Terminal block interface module products serve an interconnect function in a branching or breakout capacity, providing a convenient means of transitioning from a high density interconnect format such as a D-sub or rectangular connector to one of lower density that is more easily serviced, such as a set of terminal blocks. This can simplify installation and maintenance tasks in industrial control systems by allowing the use of high density cabling between a control device and the point at which the signals need to be made accessible for service or installation.