The PSY4001 unit has 12 inputs/outputs, mimicing an industrial conveyor system with a range of sensors. All of the input/output switches are of the latching type. This unit can be driven by a PLC, micro-computer or sequential logic system.

Connection to the unit is by Ø4mm leads (outputs : situated high on the left, inputs : situated high on the right). The control buttons are located next to the activation switches allowing manual control without any automation. Breaking capacity of the 7 outputs: 30Vcc 1A. Inputs controlled by closing a single contact. All of the power supplies necessary for operating the unit are integrated into the unit.