NI PS-15 User Manual Datasheet

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NATIONAL INSTRUMENTS

Power Supply

NI PS-15 Power Supply User Manual

June 2011

372911B-01

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Warranty

The NI PS-15 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by

receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the

warranty period. This warranty includes parts and labor.

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during the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted or error free.

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failures caused by owner’s failure to follow the National Instruments installation, operation, or maintenance instructions; owner’s modification of the

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Compliance

Electromagnetic Compatibility Information

This hardware has been tested and found to comply with the applicable regulatory requirements and limits for electromagnetic

compatibility (EMC) as indicated in the hardware’s Declaration of Conformity (DoC)1. These requirements and limits are

designed to provide reasonable protection against harmful interference when the hardware is operated in the intended

electromagnetic environment. In special cases, for example when either highly sensitive or noisy hardware is being used in close

proximity, additional mitigation measures may have to be employed to minimize the potential for electromagnetic interference.

While this hardware is compliant with the applicable regulatory EMC requirements, there is no guarantee that interference will

not occur in a particular installation. To minimize the potential for the hardware to cause interference to radio and television

reception or to experience unacceptable performance degradation, install and use this hardware in strict accordance with the

instructions in the hardware documentation and the DoC1.

If this hardware does cause interference with licensed radio communications services or other nearby electronics, which can be

determined by turning the hardware off and on, you are encouraged to try to correct the interference by one or more of the

following measures:

• Reorient the antenna of the receiver (the device suffering interference).

• Relocate the transmitter (the device generating interference) with respect to the receiver.

• Plug the transmitter into a different outlet so that the transmitter and the receiver are on different branch circuits.

Some hardware may require the use of a metal, shielded enclosure (windowless version) to meet the EMC requirements for

special EMC environments such as, for marine use or in heavy industrial areas. Refer to the hardware’s user documentation and

the DoC1 for product installation requirements.

When the hardware is connected to a test object or to test leads, the system may become more sensitive to disturbances or may

cause interference in the local electromagnetic environment.

Operation of this hardware in a residential area is likely to cause harmful interference. Users are required to correct the

interference at their own expense or cease operation of the hardware.

Changes or modifications not expressly approved by National Instruments could void the user’s right to operate the hardware

under the local regulatory rules.

1 The Declaration of Conformity (DoC) contains important EMC compliance information and instructions for the user or

installer. To obtain the DoC for this product, visit ni.com/certification, search by model number or product line,

and click the appropriate link in the Certification column.

Contents

About This Manual

Conventions ...................................................................................................................viii

Related Documentation..................................................................................................ix

Chapter 1

Getting Started

Unpacking......................................................................................................................1-1

What You Need to Get Started ......................................................................................1-1

Key Features ..................................................................................................................1-1

Power Supply Description .............................................................................................1-2

Output Terminals.............................................................................................1-3

Output Voltage Potentiometer.........................................................................1-4

DC OK LED....................................................................................................1-4

Input Terminals ...............................................................................................1-4

Mounting Equipment .....................................................................................................1-5

Side Mounting Kit ...........................................................................................1-5

Panel Mounting Kit .........................................................................................1-5

Chapter 2

Installation and Configuration

Mounting Orientation and Installation...........................................................................2-1

Wiring The Terminals....................................................................................................2-3

Operating the NI PS-15..................................................................................................2-5

Serial Operation...............................................................................................2-5

Parallel Operation............................................................................................2-6

Two-Phase Power Operation...........................................................................2-6

External Input Protection.................................................................................2-7

Operation in a Sealed Enclosure......................................................................2-7

Cooling ............................................................................................................2-8

Hazardous Risks ..............................................................................................2-8

Service Parts ....................................................................................................2-8

Peak Current Capability ..................................................................................2-9

Charging Batteries ...........................................................................................2-9

Back Feeding Loads ........................................................................................2-10

Output Circuit Breakers...................................................................................2-10

Inductive and Capacitive Loads ......................................................................2-12

Contents

NI PS-15 Power Supply User Manual vii ni.com

Appendix A

Specifications

Dimensions and Weight ................................................................................................ A-1

AC Input ........................................................................................................................A-3

Input Current Inrush Surge............................................................................................ A-5

Hold-up Time ................................................................................................................ A-6

Output ............................................................................................................................ A-7

Peak Current Capability .................................................................................. A-8

Efficiency and Power Losses......................................................................................... A-8

Reliability ...................................................................................................................... A-9

Dielectric Strength......................................................................................................... A-10

Used Substances ............................................................................................................ A-11

Environment .................................................................................................................. A-12

Protection Features ........................................................................................................ A-13

Appendix B

Technical Support and Professional Services

Index

About This Manual

The NI PS-15 Power Supply User Manual describes the features and

specifications of the NI PS-15 power supply and contains information

about installing the power supply.

Conventions

The following conventions are used in this manual:

»The » symbol leads you through nested menu items and dialog box options

to a final action. The sequence Options»Settings»General directs you to

pull down the Options menu, select the Settings item, and select General

from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to

avoid injury, data loss, or a system crash.

When this symbol is marked on a product, it denotes a warning advising

you to take precautions to avoid electrical shock.

bold Bold text denotes items that you must select or click in the software, such

as menu items and dialog box options. Bold text also denotes parameter

names.

italic Italic text denotes variables, emphasis, a cross-reference, or an introduction

to a key concept. Italic text also denotes text that is a placeholder for a word

or value that you must supply.

monospace Text in this font denotes text or characters that you should enter from the

keyboard, sections of code, programming examples, and syntax examples.

This font is also used for the proper names of disk drives, paths, directories,

programs, subprograms, subroutines, device names, functions, operations,

variables, filenames, and extensions.

Related Documentation

The following documents contain information that you might find helpful

as you read this manual:

• NI PS-15/16/17 Side Mount Brackets Installation Guide

• NI PS-15/16/17 Panel Mount Brackets Installation Guide

• NI PS-15/16/17 Instruction Manual

Getting Started

This chapter describes the key features of the NI PS-15 power supply

and lists the kit contents and mounting equipment you can order from

National Instruments.

Unpacking

Carefully inspect the shipping container and the power supply for damage.

Check for visible damage to the metal work. If damage appears to have

been caused during shipment, file a claim with the carrier. Retain the

packing material for possible inspection and/or reshipment.

What You Need to Get Started

The NI PS-15 power supply kit contains the following items:

❑NI PS-15 power supply

❑Printed NI PS-15/16/17 Instruction Manual

Key Features

The NI PS-15 includes a power reserve of 20%. This extra current may

be used continuously at temperatures up to +45 °C. Additionally, the

AC 100–120 V/200–240 V Auto-select input makes worldwide installation

and usage very simple.

The key features of the NI PS-15 power supply include the following:

• Small size—power supply width of only 32 mm

• High efficiency—efficiency up to 90.2%

• Wide temperature range—full output power between –25 °C and +60 °C

• AC 100–120/200–240 V Auto-select input

• 20% output power reserves

• Minimal inrush current surge

Chapter 1 Getting Started

NI PS-15 Power Supply User Manual 1-2 ni.com

Hazardous Voltages Must be mounted in an enclosure by qualified personnel.

This power supply is designed for installation in an enclosure and is intended for general

use, such as in industrial control, office, communication, and instrumentation equipment.

Do not use this device in aircraft, trains and nuclear equipment, where malfunctioning of

the power supply may cause severe personal injury or threaten human life. For more

information, refer to Appendix A, Specifications.

Power Supply Description

Figures 1-1 and 1-2 show the functional description and front panel

features of the NI PS-15 power supply.

Figure 1-1 provides the functional diagram for the NI PS-15.

Figure 1-1. Functional Diagram for the NI PS-15 Power Supply

–

Power

Converter

Output

Filter

Input Fuse

And

Input Filter

Input

Rectifier

And Inrush

Limiter

115/230 V

Auto Select

Output

Over-Voltage

Protection

Output

Voltage

Regulator

OUT

NATIONAL "7INSTRUMENTS \O (9 C%HWH LLLLL

Chapter 1 Getting Started

Figure 1-2 provides the front panel features of the NI PS-15.

Figure 1-2. Front View of the NI PS-15 Power Supply

Output Terminals

The NI PS-15 has a total of four output terminals, providing two

positive (+) output terminals and two negative (–) output terminals. Both

positive terminals are wired together internally, and both negative

terminals are wired together internally, as shown in Figure 1-1. The output

terminals provide 24 VDC with 5 A of current.

1Output Terminals

2Output Voltage Potentiometer

3DC OK LED

4Input Terminals

DC 24 V 10 A

DC OK

AC 100-120 / 200-240 V

28V

Power Supply

NI PS-16

Chapter 1 Getting Started

NI PS-15 Power Supply User Manual 1-4 ni.com

Output Voltage Potentiometer

Note You must open the protective flap to turn the potentiometer.

Output voltage from the NI PS-15 is set by the output voltage

potentiometer, shown in Figure 1-2. The factory setting output voltage

is 24.1 V ±0.2% (at full load when the power supply is cold), and the

potentiometer allows the output voltage to be adjusted from 24–28 V

on any unit. The output voltage may be adjusted above 28 V by the

potentiometer, but voltages beyond 28 V are not guaranteed.

Note Output voltages greater than 28 V are not supported on an NI PS-15 unit.

DC OK LED

This green LED indicates the status of available DC power through the

output terminals. If the LED is lit, DC output of greater than 21 V is

available for use through the output terminals. If the LED is not lit, DC is

not currently available. The DC OK LED is wired internally to the power

conversion circuitry prior to the output filtering stage, as shown in

Figure 1-1.

If the DC OK LED does not light when power is provided through the input

terminals, it may indicate a problem with the power supply. Contact

National Instruments for more details.

Input Terminals

Caution National Instruments recommends that you wire all three input terminals for

proper operation of the NI PS-15.

The NI PS-15 power supply derives power through the input terminals

on the front panel, shown in Figure 1-2. There are three terminals

corresponding to the Neutral input, the Line (or hot) input, and the

Protective Earth (PE) input. The NI PS-15 rectifies both single-phase and

two-phase AC input. The Neutral input terminal provides a MAINS return

path for the input circuitry. The Line input is the primary power input for

the supply. The PE input corresponds to an earth ground. As shown in

Figure 1-1, the power supply case itself is grounded to the PE input.

Chapter 1 Getting Started

Mounting Equipment

Contact National Instruments to order the following mounting options for

the NI PS-15 power supply. Refer to Table 1-1 for part numbers.

Side Mounting Kit

The Side Mounting Kit (199429-01) allows you to mount the NI PS-15 on

its side to a wall, panel surface, or a DIN-Rail for reduced installation

depth. Refer to the NI PS-15/16/17 Side Mount Brackets Installation Guide

at ni.com for more information.

Panel Mounting Kit

The Panel Mounting Kit (199432-01) allows you to mount the NI PS-15

to a wall or panel surface without using a DIN-Rail. Refer to the

NI PS-15/16/17 Panel Mount Brackets Installation Guide at ni.com

for more information.

Table 1-1. Mounting Equipment

Part Number Mounting Kit

199429-01 SIDE MOUNTING KIT FOR NI PS-15

199432-01 PANEL MOUNTING KIT FOR NI PS-15/16/17

Installation and Configuration

This chapter describes how to prepare and operate the NI PS-15 power

supply.

Mounting Orientation and Installation

This section describes the different mounting orientations, and the effect

that mounting orientation has on power supply performance.

Mounting orientations other than input terminals on the bottom and output

on the top require a reduction in continuous output power or a limitation in

the maximum allowed ambient temperature. The amount of reduction

influences the lifetime expectancy of the power supply. Therefore,

two different derating curves for continuous operation are referenced in

Figure 2-1:

•Curve A1—Recommended output current.

•Curve A2—Maximum allowed output current (which results in

approximately half the lifetime expectancy for the power supply when

following curve A1).

Note National Instruments recommends that the power supply be oriented such that the

output terminals are located on top and the input terminals located on bottom. Figure 2-1

refers to this as the Standard Orientation.

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-2 ni.com

Figure 2-1. NI PS-15 Mounting Orientations

Mount the NI PS-15 power supply according to the installation instructions

included with your mounting kit. For details on the mounting options available,

refer to the Mounting Equipment section of Chapter 1, Getting Started.

Output Current

10 20 30 40 60°C

12 A

Ambient Temperature

Mounting

Orientation A

(Standard

Orientation)

Mounting

Orientation E

(Horizontal ccw)

Power

Supply

OUTPUT

INPUT

Output Current

10 20 30 40 60°C

12 A

Ambient Temperature

Mounting

Orientation D

(Horizontal ccw)

Mounting

Orientation C

(Table-top

Mounting)

Mounting

Orientation B

(Upside Down)

Power

Supply

OUTPUT

INPUT

Power

Supply

OUTPUT

INPUT

Power

Supply

OUTPUT

INPUT

Output Current

10 20 30 40 60°C

12 A

Ambient Temperature

Output Current

10 20 30 40 60°C

12 A

Ambient Temperature

Output Current

10 20 30 40 60°C

12 A

Ambient Temperature

Chapter 2 Installation and Configuration

Wiring The Terminals

This section describes wiring for the NI PS-15 power supply. Table 2-1

provides a list of basic requirements for wiring.

Consider the following when wiring the NI PS-15.

• Use appropriate copper cables that are designed for an operating

temperature of:

– 60 °C for ambient up to 45 °C.

– 75 °C for ambient up to 60 °C minimum.

• Follow national installation codes and installation regulations.

• Up to two stranded wires with the same cross section are permitted in

one connection point (except PE wire).

• Do not use the unit without the PE connection being wired.

Complete the following steps to connect wires to the input and output

terminals.

1. Ensure that none of the wires are connected to live power.

2. Strip the ends of the wires according to the recommendations in

Table 2-1.

Table 2-1. Wiring Requirements

Type Spring-Clamp Terminals

Solid wire 0.5–6 mm

Stranded wire 0.5–4 mm

American wire gauge 20–10 AWG

Ferrules Allowed, but not required

Wire stripping length 7 mm (0.275 in.)

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-4 ni.com

3. Ensure that the terminal lever is in an open position as shown in

Figure 2-2.

Figure 2-2. Connecting a Wire

4. Insert the end of the wire into the terminal until the exposed portion of

the wire is completely inside of the terminal connection as shown in

Figure 2-2. If you are using stranded wire, ensure that all strands of the

wire enter the terminal connection.

5. Move the lever until the lever snaps into the closed position, as shown

in Figure 2-2.

6. Repeat steps 4–5 for each of the other terminals.

7. Ensure that all wires are properly seated and not loose.

8. Ensure that the rest of your equipment is ready to be powered without

creating a hazard.

9. Apply MAINS voltage to the NI PS-15 power supply.

Inserting The Wire Closing The Lever

UUUUU UUUUU

Chapter 2 Installation and Configuration

Operating the NI PS-15

This section provides general information on the operation of the NI PS-15

power supply.

Serial Operation

The NI PS-15 can operate in series to increase the output voltage.

Figure 2-3 shows the NI PS-15 in a serial configuration.

Figure 2-3. NI PS-15 in Serial Operation

Before operating the NI PS-15 in a serial configuration, consider the

following:

• It is possible to connect as many units in series as needed, providing

the sum of the output voltage does not exceed 150 VDC.

• Voltages with a potential above 60 VDC are not SELV-compliant any

more and can be dangerous. Such voltages must be installed with a

protection against touching.

• Use power supplies of the same type for serial operation.

• Earthing of the output is required when the sum of the output voltage

is above 60 VDC.

• Keep an installation clearance of 15 mm (left/right) between two

power supplies and avoid installing the power supplies on top of each

other.

Caution Avoid return voltage (for example, from a decelerating motor or battery) which is

applied to the output terminals.

Earth

Unit A

Unit B

–

Load

–

<3>

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-6 ni.com

Parallel Operation

Caution The power supply must not be used in parallel for the purpose of increasing the

output power.

Power supplies can be paralleled for 1+1 redundancy to gain a higher

system availability. Redundant systems require a certain amount of extra

power to support the load in case one power supply unit fails. The simplest

way is to put two NI PS-15 power supplies in parallel. If one power supply

unit fails, the other one is automatically able to support the load current

without any interruption. When using this method of building a redundant

system consider the following:

• The faulty power supply can not be recognized. The green LED will

still be on since it is reverse-powered from the other power supply.

• It does not cover failures such as an internal short circuit in the

secondary side of the power supply. In such a case (nearly impossible),

the defective unit becomes a load for the other power supplies and the

output voltage can not be maintained.

Recommendations for building redundant power systems:

• Use separate input fuses for each power supply.

• When possible, connect each power supply to different phases or

circuits.

Two-Phase Power Operation

The NI PS-15 power supply can operate with two-phase power, as shown

in Figure 2-4.

Figure 2-4. NI PS-15 in Two-Phase Operation

Before operating the NI PS-15 in this configuration, consider the following:

internal

fused

240 V +10% max.

Fuse

Power Supply

Chapter 2 Installation and Configuration

• A phase-to-phase connection is allowed as long as the supplying

voltage is below 240 V +10%.

• Use a fuse or a circuit breaker to protect the N (Neutral) input. The

N input is not protected internally and in two-phase configuration

would be connected to a hot wire.

Appropriate fuses and circuit breakers are specified in the External Input

Protection section.

External Input Protection

The NI PS-15 power supply is tested and approved for branch circuits up

to 20 A. External protection is only required if the supplying branch has an

ampacity greater than 20 A. In some countries local regulations might

apply, so check local codes and local requirements.

If an external fuse is utilized, a minimum value is required to avoid

undesired tripping of the fuse, shown in Table 2-2.

Operation in a Sealed Enclosure

When the power supply is installed in a tightly sealed enclosure, the

temperature inside the enclosure will be higher than outside. The inside

temperature defines the ambient temperature for the power supply.

The following is the result of such an installation, where the NI PS-15

power supply was placed in the middle of a sealed enclosure, and no other

heat producer was present:

Enclosure................................................ Rittal Type IP66 Box PK 9516

100, plastic, 110 mm × 180 mm ×

165 mm

Load ....................................................... 24 V, 4 A; (= 80%) load is placed

outside the box

Input ....................................................... 230 VAC

Table 2-2. Maximum and Minimum Ampacities for External Fuses

Ampacity B-Characteristic C-Characteristic

Minimum 10 A 6 A

Maximum 20 A 20 A

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-8 ni.com

Temperature inside the box ....................44.3 °C (in the middle of the right

side of the power supply with a

distance of 2 cm)

Temperature outside the box ..................23.3 °C

Temperature rise .....................................21 °C

Cooling

The NI PS-15 is convection cooled, and direct cooling is not required.

However, you must not cover the ventilation grid (for example, with cable

conduits) by more than 30%.

Proper installation clearance for the NI PS-15 is 40 mm on top, 20 mm on

the bottom, 5 mm on the left and right side when loaded permanently with

full power. If the adjacent device is a heat source, 15 mm clearance is

recommended between the NI PS-15 and the adjacent device.

Hazardous Risks

Cautions Do not use the unit without the proper earth connection (Protective Earth).

Use the PE pin on the front panel terminal block for earth connection instead of one of the

screws on the housing.

Turn the power off before working on the power supply. Protect against inadvertent

re-powering.

Make sure the wiring is correct by following all local and national codes.

Do not open, modify, or repair the unit.

Use caution to prevent any foreign objects from entering into the housing.

Do not use in wet locations or in areas where moisture or condensation can be expected.

Service Parts

The NI PS-15 power supply does not contain any serviceable parts.

If an internal fuse trips, it is caused by an internal defect. If damage or

malfunction occurs during operation, immediately turn the power off

and send the NI PS-15 to National Instruments for inspection.

Note Attempting to repair or modify the NI PS-15 power supply will void your warranty.

Chapter 2 Installation and Configuration

Peak Current Capability

Solenoids, contactors and pneumatic modules often have a steady state coil

and a pick-up coil. The inrush current demand of the pick-up coil is several

times higher than the steady state current and usually exceeds the nominal

output current (including the PowerBoost). The same situation applies

when starting a capacitive load.

Branch circuits are often protected with circuit breakers or fuses. In case of

a short or an overload in the branch circuit, the fuse needs a certain amount

of over-current to trip or to blow. The peak current capability ensures the

safe operation of subsequent circuit breakers.

Assuming the input voltage is turned on before such an event, the built-in

large sized output capacitors inside the power supply can deliver extra

current. Discharging this capacitor causes a voltage dip on the output.

Figure 2-5 illustrates two typical voltage dips.

Figure 2-5. Peak Current Capacity Output Voltage Dips

Charging Batteries

The NI PS-15 power supply should not be used to charge batteries.

Peak load 10 A (resistive) for 50 ms

Output voltage dips from 24 V to 18.5 V.

Peak load 25 A (resistive) for 5 ms

Output voltage dips from 24 V to 12 V.

Output

Current

10 A

24 V

Output

Voltage

18.5 V

10 ms/DIV

Output

Current

25 A

24 V

Output

Voltage

20 V

0 A

1 ms/DIV

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-10 ni.com

Back Feeding Loads

Loads such as decelerating motors and inductors can feed voltage back to

the power supply. This feature is also called return voltage immunity or

resistance against back-EMF (Electro Magnetic Force). The NI PS-15

power supply is resistant to this and does not malfunction when a load feeds

back voltage to the power supply, regardless of whether the power supply

itself is on or off.

The maximum allowed feed back voltage is 35 VDC. The absorbing energy

can be calculated according to the built-in large sized output capacitor,

which is specified in the Output section of Appendix A, Specifications.

Output Circuit Breakers

Standard miniature circuit breakers (MCBs) can be used for branch

protection. Ensure that the MCB is also rated for DC voltage. The

following tests show which circuit breakers the power supply typically

trips.

Note Circuit breakers have huge tolerances in their tripping behavior. Therefore, these

typical tests can only be used as a recommendation or for comparing two different power

supplies. Furthermore, the loop impedance has a major influence on whether a breaker trips

or not.

Test 1: Short circuit with S1 on the power supply end of the cable (loop

impedance approximately 20 mΩ). The input voltage was 230 VAC and the

load current was 0 A.

Figure 2-6. Breaker Trip Test 1

–

Load

–

Circuit

Breaker

Power

Supply

Chapter 2 Installation and Configuration

The following circuit breaker tripped during the test:

A or Z-Characteristic ............................. ≤ 8 A

B-Characteristic ..................................... No tripping ≥6 A

No breaker available <6 A

C-Characteristic ..................................... ≤ 4 A

Test 2: Short circuit with S1 on the load end (additional impedance is

included in the form of longer load wire length). The input voltage was

230 VAC and the load current was 0 A.

Figure 2-7. Breaker Trip Test 2

The following circuit breaker tripped during the test:

A or Z-Characteristic ............................. ≤ 6 A and R = 180 mΩ

B-Characteristic ..................................... No tripping ≥6 A

No breaker available <6 A

C-Characteristic ..................................... ≤ 3 A and R = 270 mΩ

Table 2-3 provides a comparison of resistances in terms of wire gauge and

length.

Table 2-3. Resistances for Wire Gauges and Lengths

Resistance 0.5 mm20.7 mm21.0 mm21.5 mm22.5 mm24.0 mm2

180 mΩ5.0 m 7.0 m 10 m 15 m 25 m 40 m

270 mΩ7.5 m 10.5 m 15 m 23 m 38 m 60 m

Circuit

Breaker

Power

Supply

–

Load

–

Chapter 2 Installation and Configuration

NI PS-15 Power Supply User Manual 2-12 ni.com

For example: Which wire gauge must be used to trip a C-Characteristic

circuit breaker with a rating of 3 A? The load wire length is 21 m.

Answer: A 3 A C-Characteristic circuit breaker requires a loop impedance

of less than 270 mΩ (test results). Table 2-3 shows that up to 23 m of wire

with a cross section of 1.5 mm2 is below 270 mΩ. You should not use a

wire smaller than 1.5 mm2.

Inductive and Capacitive Loads

The NI PS-15 is designed to supply any kind of load, including unlimited

capacitive and inductive loads.

9&7

Specifications

This appendix contains specifications for the NI PS-15 power supply.

Note Specifications are subject to change without notice.

Hazardous Voltages Must be mounted in an enclosure by qualified personnel. Refer to

Figure A-1 for more information.

This power supply is designed for installation in an enclosure and is intended for general

use, such as in industrial control, office, communication, and instrumentation equipment.

Do not use this device in aircraft, trains and nuclear equipment, where malfunctioning of

the power supply may cause severe personal injury or threaten human life.

Dimensions and Weight

Dimensions

Width .............................................. 32 mm

Height.............................................. 124 mm

Depth............................................... 117 mm

Weight.................................................... 500 g (1.1 lb)

Appendix A Specifications

NI PS-15 Power Supply User Manual A-2 ni.com

Figure A-1. NI PS-15 Power Supply

Figure A-2. NI PS-15 Dimensions

1Suitably rated NEMA or IP enclosure that requires tool access 2NI PS-15 Power Supply

DIN-Rail Depth

Depth: 117 mm (4.61 in.)

Height: 124 mm (4.88 in.)

19.14.7

25.43

24–28 V

DC OK

+ + – –

N L

Width: 32 mm

(1.26 in.)

AC 100-120 / 200-240 V

DC 24 V 5 A

Appendix A Specifications

AC Input

AC input Nominal AC 100 –120 V/200 –240 V Auto-select input, TN-, TT-, IT-Mains, refer to Figure A-3

AC input range 90–132 VAC

180–264 VAC

85–90 VAC

264–300 VAC

100–120 V range, continuous operation

200–240 V range, continuous operation

Short term or with output derating

<0.5 s

Input frequency Nominal 50–60 Hz ±6%

DC input Not allowed —

Typical/

Maximum

100 V

120 V

230 V

Input current Typical 2.34 A 2.05 A 1.23 A At 24 V, 5 A refer to Figure A-3

Power factor*Typical 0.58 0.56 0.47 At 24 V, 5 A refer to Figure A-3

Crest factor** Typical 2.9 3.1 3.7 At 24 V, 5 A

Start-up delay Typical 740 ms 900 ms 720 ms Refer to Figure A-4

Rise time Typical

Typical

8 ms

25 ms

8 ms

25 ms

8 ms

25 ms

0 mF, 24 V, 5 A, refer to Figure A-4

5 mF, 24 V, 5 A, refer to Figure A-4

Turn-on

overshoot

Maximum 400 mV 400 mV 400 mV Refer to Figure A-4

Turn-on voltage Typical 75 VAC 75 VAC —Steady-state value, refer to Figure A-3

Shut-down

voltage

Typical 55 VAC 55 VAC —Steady-state value, refer to Figure A-3

* The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.

** The crest factor is the mathematical ratio of the peak value to the RMS value of the input current waveform.

Outpu‘ Cunard

Appendix A Specifications

NI PS-15 Power Supply User Manual A-4 ni.com

Figure A-3. Input Voltage Range

Figure A-4. Turn On Behavior, Definitions

Figure A-5. Input Current Vs. Output Load

Turn-on

90 V

Rated Input Ranges

OUT

264 Vac180 V

Shut-down

132 V

Harm

From

132 to

180 V

Range

100-

120 V

Range

200-

240 V

Start-up

Delay

Rise

Time

Overshoot

–5%

Output

Voltage

Intput

Voltage

2.5

0.5

1.5

Input

Current, Typ.

Output Current

230 Vac

120 Vac

100 Vac

6A13452.5 3.5 4.5 5.51.5 2

“WWW ywywwij w mm wuuzw‘ “Wm H“ Mi, mmu m ‘ m mm mm m m de‘ay

Appendix A Specifications

Figure A-6. Power Factor Vs. Output Load

Input Current Inrush Surge

An active inrush limitation circuit limits the input inrush current after input

voltage is applied. The charging current into EMI suppression capacitors is

disregarded in the first milliseconds after power up.

Figure A-7. Input Inrush Current, Typical Behavior

Typical/

Maximum AC 100 V AC 120 V AC 230 V

Inrush current Maximum

Typical

10 Apeak

3 Apeak

10 Apeak

3 Apeak

10 Apeak

3 Apeak

–25 °C to +70 °C

Inrush energy Typical 1 A2s1 A2s1 A2s–25 °C to +70 °C

0.35

0.4

Output Current

0.45

0.5

0.55

0.6

0.65

Power Factor, Typ.

230 Vac

120 Vac

100 Vac

6 A13452.5 3.5 4.5 5.51.5 2

Input Current

Input Voltage

Output Voltage

Input:

Output:

Ambient:

Upper curve:

Medium curve:

Lower curve:

Time scale:

Start-up delay = Inrush delay

230 Vac

24 V, 10 A

25 °C

Input current 10 A / DIV

Input voltage 500 V / DIV

Output voltage 20 V / DIV

100 ms / DIV

Appendix A Specifications

NI PS-15 Power Supply User Manual A-6 ni.com

Hold-up Time

Figure A-8. Hold-Up Time Vs. Input Voltage

Figure A-9. Shutdown Behavior, Definitions

Note At no load, the hold-up time can be up to several seconds. The green DC OK LED

is lit during this time.

Typical/

Maximum

100V

120V

230V

Hold-up Time Typical 109 ms 165 ms 161 ms 2.5 A, 24 V, refer to Figure A-8

Typical 50 ms 80 ms 78 ms 5 A, 24 V, refer to Figure A-8

Typical 37 ms 62 ms 63 ms 6 A, 24 V, refer to Figure A-8

150 ms

Hold-up Time

100

125

Input Voltage

a) 24 V 2,5 A typ.

b) 24 V 2,5 A min.

c) 24 V 5 A typ.

d) 24 V 5 A min.

e) 24 V 6 A min.

aab

180 230 Vac100 120

– 5%

Hold-up Time

Zero Transition

Output

Voltage

Intput

Voltage

Appendix A Specifications

Output

Figure A-10. Output Voltage Vs. Output Current, Typical

Output voltage Nominal 24 V —

Adjustment range Minimum

Maximum

24–28 V

30 V

Guaranteed

At clockwise end position of potentiometer

Factory setting —24.1 V ±0.2%, at full load, cold unit

Line regulation Maximum 70 mV 90 VAC to 132 VAC or 180 VAC to 264 VAC

Load regulation Maximum 100 mV Static value, 0A → 5A → 0A

Ripple and noise voltage Maximum 50 mVpp 20 Hz to 20 MHz, 50 Ω

Output capacitance Typical 1,800 µF —

Output current Nominal

Nominal

6 A*

5 A

5.1 A*

4.3 A

At 24 V, ambient < 45 °C, refer to Figure A-10

At 24 V, ambient < 60 °C, refer to Figure A-10

At 28 V, ambient < 45 °C, refer to Figure A-10

At 28 V, ambient < 60 °C, refer to Figure A-10

Output power Nominal

Nominal

144 W*

120 W

Ambient < 45 °C

Ambient < 60 °C

Short-circuit current Minimum

Maximum

10 A

14 A

Load impedance 200 mΩ, refer to Figure A-10

* The NI PS-15 may respond with a thermal shut-down when continuously loaded with more than 120 W and operated with

a MAINS voltage of 100 V or below.

Output Voltage

28 V

12 A1062

Adjustment

Range

Output Current

Appendix A Specifications

NI PS-15 Power Supply User Manual A-8 ni.com

Peak Current Capability

The power supply can deliver a peak current which is higher than the

specified short term current. This helps to start current-demanding loads or

to safely operate subsequent circuit breakers.

The extra current is supplied by the output capacitors inside the power

supply. During this event, the capacitors will be discharged and cause a

voltage dip on the output. Detailed curves can be found in the Peak Current

Capability section of Chapter 2, Installation and Configuration.

Efficiency and Power Losses

Peak current voltage dips Typical From 24 V to 18.5 V At 10 A for 50 ms, resistive load

Typical From 24 V to 22 V At 25 A for 2 ms, resistive load

Typical From 24 V to 20 V At 25 A for 5 ms, resistive load

100V

120V

230V

Efficiency Typical 88.8% 89.4% 90.2% 5 A, 24 V

Power losses Typical 1.9 W 2.0 W 1.7 W 0 A

Typical 9.1 W 8.8 W 8.2 W 2.5 A, 24 V

Typical 15.3 W 14.5 W 13.2 W 5 A, 24 V

Typical 19.4 W 18.2 W 16.1 W 6 A, 24 V

Appendix A Specifications

Figure A-11. NI PS-15 Efficiency and Losses

Reliability

The lifetime expectancy shown in Table A-1 indicates the service life of the

NI PS-15, and is determined by the lifetime expectancy of the built-in

electrolytic capacitors. Lifetime expectancy is specified in operational

hours. Lifetime expectancy is calculated according to the capacitor’s

manufacturer specification. The prediction model allows a calculation of up

to 15 years from the date of shipment.

MTBF (Mean Time Between Failure) is calculated according to statistical

device failures and indicates reliability of a device. It is the statistical

representation of the likelihood of a unit to fail and does not necessarily

represent the life of a product.

Efficiency vs. output current at 24 V Losses vs. output current at 24 V

Efficiency

91%

100 Vac

120 Vac

230 Vac

6 A2 3

Power Losses

18 W

120 Vac

100 Vac

230 Vac

Output CurrentOutput Current

3012 456

Efficiency vs. input voltage, 24 V, 5 A Losses vs. input voltage, 24 V, 5 A

Efficiency

260

Vac

Input Voltage Input Voltage

91%

88.5

89.5

90.5

90.0

89.0

88.0

Power Losses

18 W

260

Vac

85 120 155 190 225 85 120 155 190 225

Appendix A Specifications

NI PS-15 Power Supply User Manual A-10 ni.com

Dielectric Strength

Notes The output voltage is floating and has no ohmic connection to ground.

To fulfill the PELV requirements according to EN60204-1 § 6.4.1, we recommend that

either the + pole, the – pole or any other part of the output circuit should be connected

to the protective earth system. This helps to avoid situations in which a load starts

unexpectedly or can not be switched off when unnoticed earth faults occur.

Table A-1. Reliability Specifications

Minimum/

Maximum

100V

120V

230V

Lifetime expectancy Minimum 52,000 hours 58,000 hours 72,000 hours 40 °C, 24 V, 5 A

Minimum 27,000 hours 34,000 hours 42,000 hours 40 °C, 24 V, 6 A

Minimum 135,000 hours 128,000 hours 144,000 hours 40 °C, 24 V, 2.5A

Minimum 142,000 hours 15 years 15 years 25 °C, 24 V, 5 A

MTBF SN 29500,

IEC 61709

—638,000 hours 661,000 hours 869,000 hours 40 °C, 24 V, 5 A

542,000 hours 562,000 hours 739,000 hours 40 °C, 24 V, 6 A

1,077,000 hours 1,111,000 hours 1,495,000 hours 25 °C, 24 V, 5 A

MTBF MIL HDBK 217F —552,000 hours 546,000 hours 574,000 hours 40 °C, 24 V, 5 A,

Ground Benign

GB40

497,000 hours 491,000 hours 517,000 hours 40 °C, 24 V, 6 A,

Ground Benign

GB40

788,000 hours 775,000 hours 800,000 hours 25 °C, 24 V, 5 A,

Ground Benign

GB25

Appendix A Specifications

Figure A-12. Dielectric Strength

Table A-2 lists the tests that have been run to determine the NI PS-15

dielectric strength, and the results of each test.

Type tests and factory tests

Conducted by the manufacturer. Do not repeat test in field.

Rules for field test

Use appropriate test equipment which applies the voltage with a slow ramp.

Connect L and N together as well as all output poles.

Used Substances

• The unit does not release any silicone and is suitable for the use in paint

shops.

• Electrolytic capacitors included in this unit do not use electrolytes such

as Quaternary Ammonium Salt Systems.

• Plastic housings and other molded plastic materials are free of

halogens, wires and cables are not PVC insulated.

Table A-2. Dielectric Strength Test Results

Tes t Duration A B C

Type test 60 s 2500 VAC 3000 VAC 500 VAC

Factory test 5 s 2500 VAC 2500 VAC 500 VAC

Field test 5 s 2000 VAC 2000 VAC 500 VAC

Input

Earth, PE

Output

–

Appendix A Specifications

NI PS-15 Power Supply User Manual A-12 ni.com

• The production material within our production does not include

following toxic chemicals: Polychlorized Biphenyl (PCB),

Polychlorized Terphenyl (PCT), Pentachlorophenol (PCP),

Polychlorinated naphthalene (PCN), Polybrom Biphenyl (PBB),

Polybrom Bipheny-oxyd (PBO), Polybrominated Diphenylether

(PBDE), Polychlorinated Diphenylether (PCDE), Polydibromphenyl

Oxyd (PBDO), Cadmium, Asbest, Mercury, Silicia.

Environment

Operational temperature –25 °C to +70 °C

(–13 °F to 158 °F)

Reduce output power according to

Figure A-13

Output de-rating 1.6 W/°C 45–60 °C (113 °F to 140 °F)

3 W/°C 60–70 °C (140 °F to 158 °F)

Storage temperature –40 to +85 °C (–40 °F to 185 °F) Storage and transportation

Humidity 5 to 95% r.H. IEC 60068-2-30

Do not energize while condensation is

present

Vibration sinusoidal 2–17.8 Hz: ±1.6 mm;

17.8–500 Hz: 2 g 2 hours / axis

IEC 60068-2-6

Shock 30 g 6 ms, 20 g 11 ms

3 bumps/direction, 18 bumps total

IEC 60068-2-27

Altitude 0 to 6000 m (0 to 20,000 ft) Reduce output power or ambient

temperature above 2000 m sea level

Output de-rating (for altitude) 7.5 W/1000 m or 5 °C/1000 m Above 2000 m (6500 ft), refer to

Figure A-14

Over-voltage category III EN 50178, altitudes up to 2000 m

II Altitudes from 2000 m to 6000 m

Degree of pollution 2EN 50178, not conductive

Appendix A Specifications

Figure A-13. Output Current Vs. Ambient Temperature

Figure A-14. Output Current Vs. Altitude

Note The ambient temperature is defined as the temperature 2 cm below the NI PS-15.

Protection Features

Output protection Electronically protected against overload, no-load and short-circuits

Output over-voltage

protection

Typical 35 VDC

Maximum 39 VDC

In case of an internal power supply defect, a redundant

circuitry limits the maximum output voltage. The output

shuts down and automatically attempts to restart.

Output over-current

protection

Electronically limited Refer to Figure A-10.

Degree of protection IP 20 EN/IEC 60529

Penetration protection >3.5 mm From screws, small parts, and so on

6 A

–25 0 20 40 60 70 °C

Short

Term

Allowable Output

Current at 24a V

Ambient Temperature

Continuous

Altitude

Short

Term

6 A

Allowable Output

Current at 24 V

0 2000 4000 6000 m

A... Tamb < 60

B... Tamb < 50

C... Tamb < 40

Appendix A Specifications

NI PS-15 Power Supply User Manual A-14 ni.com

Note In case of a protection event, audible noise may occur.

Safety

This product is designed to meet the requirements of the following

standards of safety for industrial control and information technology

equipment:

• IEC/EN 60950-1, UL 508

Note For UL and other safety certifications, refer to the product label or the Online

Product Certification section.

Electromagnetic Compatibility

This product is designed to meet the requirements of the following

standards of EMC for industrial control and information technology

equipment:

Over-temperature

protection

Yes Output shut-down with automatic restart

Input transient protection MOV Metal Oxide Varistor

Internal input fuse T4A H.B.C. Not user replaceable

EMC Immunity EN 61000-6-2

EN 61000-6-1

Generic standards

Electrostatic discharge EN 61000-4-2 Contact discharge

Air discharge

8 kV

15 kV

Criterion A

Electromagnetic RF field EN 61000-4-3 80 MHz–1 GHz 10 V/m Criterion A

Fast transients (Burst) EN 61000-4-4 Input lines

Output lines

4 kV

2 kV

Criterion A

Surge voltage on input EN 61000-4-5 L → N

N/L → PE

2 kV

4 kV

Criterion A

Surge voltage on output EN 61000-4-5 + → –

+/– → PE

500 V

Criterion A

Conducted disturbance EN 61000-4-6 0.15–80 MHz 10 V Criterion A

Appendix A Specifications

Switching Frequency

175 kHz to 225 kHz ........................ input voltage dependent 24 V,

2.5 A

100 kHz to 130 kHz ........................ input voltage dependent 24 V, 5 A

Notes This device complies with FCC Part 15 rules.

Operation is subjected to following two conditions: (1) this device may not cause harmful

interference, and (2) this device must accept any interference received, including

interference that may cause undesired operation.

Above an average output current of 2.7 A, the harmonic current standard EN 61000-3-2 is

not fulfilled.

Mains voltage dips EN 61000-4-11 0% of 100 VAC 0 VAC, 20 ms Criterion A

40% of 100 VAC 40 VAC, 200 ms Criterion C

70% of 100 VAC 70 VAC, 500 ms Criterion A

0% of 200 VAC 0 VAC, 20 ms Criterion A

40% of 200 VAC 80 VAC, 200 ms Criterion C

70% of 200 VAC 140 VAC, 500 ms Criterion A

Voltage interruptions EN 61000-4-11 0 VAC, 5000 ms Criterion C

Powerful transients VDE 0160 Over entire load range 750 V, 1.3 ms Criterion A

Criterions:

A: Power supply shows normal operation behavior within the defined limits.

C: Temporary loss of function is possible. Power supply might shut-down and restarts by itself. No damages or hazards for

the power supply occur.

EMC Emission EN 61000-6-4 Generic standards

Conducted emission EN 55011, EN 55022, FCC Part 15,

CISPR 11, CISPR 22

Class B, input lines

EN 55022 Class A, output lines

Radiated emission EN 55011, EN 55022 Class B

Harmonic input current EN 61000-3-2 >2.7 A output current not fulfilled

Voltage fluctuations, flicker EN 61000-3-3 fulfilled

Appendix A Specifications

NI PS-15 Power Supply User Manual A-16 ni.com

A power supply has to comply with EN 61000-3-2 (Standard for harmonic

input current) when:

• the end-device is used within the European Union and

• the end-device is connected to a public mains supply with a nominal

voltage greater than or equal to 220 VAC and

• the power supply is:

– fitted in an end-device with an average input power

in excess of 75 W

– fitted in an end-device with a continuous input power

in excess of 75 W

– part of a lighting system.

Exceptions

End-devices for professional applications with an input power > 1000 W

do not need to fulfill EN 61000-3-2.

Comments

• The average input power must be determined in accordance with

EN 61000-3-2.

• Industrial MAINS supplies with their own transformer are considered

to be non-public.

• Where individual self-contained items of equipment are installed in a

rack or case (for example, devices connected in parallel), they are

regarded as being individually connected to the MAINS supply. The

rack or case need not be tested as a whole. Alternatively, it is also

permitted to assess the whole rack or case. This is recommended for

devices used in professional applications with an input power greater

than 1000 W.

Notes For the standards applied to assess the EMC of this product, refer to the Online

Product Certification section.

For EMC compliance, operate this device with shielded cabling.

CE Compliance

This product meets the essential requirements of applicable European

Directives as follows:

• 2006/95/EC; Low-Voltage Directive (safety)

• 2004/108/EC; Electromagnetic Compatibility Directive (EMC)

M @®

Appendix A Specifications

Certifications

Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional

regulatory compliance information. To obtain product certifications and the

DoC for this product, visit ni.com/certification, search by model

number or product line, and click the appropriate link in the Certification

column.

Environmental Management

NI is committed to designing and manufacturing products in an

environmentally responsible manner. NI recognizes that eliminating

certain hazardous substances from our products is beneficial to the

environment and to NI customers.

For additional environmental information, refer to the NI and the

Environment Web page at ni.com/environment. This page contains the

environmental regulations and directives with which NI complies, as well

as other environmental information not included in this document.

Waste Electrical and Electronic Equipment (WEEE)

EU Customers At the end of the product life cycle, all products must be sent to a WEEE

recycling center. For more information about WEEE recycling centers, National

Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on

Waste and Electronic Equipment, visit ni.com/environment/weee.

IND. CONT. EQ.

18WM

LISTED

LISTED as Industrial Control Equipment (UL 508)

RECOGNIZED as Information Technology Equipment (UL 60950-1)

GL (Germanischer Lloyd) classified for marine and

offshore applications. Environmental category: C, EMC2

⬉ᄤֵᙃѻક∵ᶧ᥻ࠊㅵ⧚ࡲ⊩ ˄Ё೑

RoHS

Ё೑ᅶ᠋ National Instruments ヺড়Ё೑⬉ᄤֵᙃѻકЁ䰤ࠊՓ⫼ᶤѯ᳝ᆇ⠽䋼ᣛҸ (RoHS)Ǆ

݇Ѣ National Instruments Ё೑ RoHS ড়㾘ᗻֵᙃˈ䇋ⱏᔩ ni.com/environment/rohs_chinaǄ

(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

Technical Support and

Professional Services

Visit the following sections of the award-winning National Instruments

Web site at ni.com for technical support and professional services:

•Support—Technical support at ni.com/support includes the

following resources:

–Self-Help Technical Resources—For answers and solutions,

visit ni.com/support for software drivers and updates,

a searchable KnowledgeBase, product manuals, step-by-step

troubleshooting wizards, thousands of example programs,

tutorials, application notes, instrument drivers, and so on.

Registered users also receive access to the NI Discussion Forums

at ni.com/forums. NI Applications Engineers make sure every

question submitted online receives an answer.

–Standard Service Program Membership—This program

entitles members to direct access to NI Applications Engineers

via phone and email for one-to-one technical support as well as

exclusive access to on demand training modules via the Services

Resource Center. NI offers complementary membership for a full

year after purchase, after which you may renew to continue your

benefits.

For information about other technical support options in your

area, visit ni.com/services, or contact your local office at

ni.com/contact.

•Training and Certification—Visit ni.com/training for

self-paced training, eLearning virtual classrooms, interactive CDs,

and Certification program information. You also can register for

instructor-led, hands-on courses at locations around the world.

•System Integration—If you have time constraints, limited in-house

technical resources, or other project challenges, National Instruments

Alliance Partner members can help. To learn more, call your local

NI office or visit ni.com/alliance.

Appendix B Technical Support and Professional Services

NI PS-15 Power Supply User Manual B-2 ni.com

•Declaration of Conformity (DoC)—A DoC is our claim of

compliance with the Council of the European Communities using

the manufacturer’s declaration of conformity. This system affords

the user protection for electromagnetic compatibility (EMC) and

product safety. You can obtain the DoC for your product by visiting

ni.com/certification.

•Calibration Certificate—If your product supports calibration,

you can obtain the calibration certificate for your product at

ni.com/calibration.

You also can visit the Worldwide Offices section of ni.com/niglobal

to access the branch office Web sites, which provide up-to-date contact

information, support phone numbers, email addresses, and current events.

Index

AC input specifications, A-3

back feeding loads, 2-10

calibration certificate (NI resources), B-2

capacitive loads, 2-12

CE compliance, specifications, A-16

certification specifications, A-17

charging batteries, use, 2-9

circuit breakers, output, 2-10

conventions used in the manual, viii

cooling the NI PS-15, 2-8

current capability, peak, 2-9

figure, 2-9

Declaration of Conformity (NI resources), B-2

diagnostic tools (NI resources), B-1

dielectric strength specifications, A-10

dimension specifications, A-1

documentation

conventions used in manual, viii

NI resources, B-1

NI PS-15 User Manual Datasheet

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