The model 621-9934 I/O Power Supply Module provides 8 A of +5 Vdc power. It also provides 600 mA of ?15 Vdc power for operation of some special function I/O and analog I/O modules. The module is selectable for 115/230 Vac operation, 46 to 63 Hz.

A terminal block at the top of the module front coverplate is labeled with an A (L1 or Line), a B (L2 or Common), and a ground symbol for AC input wiring connection.