Product Description
The EM 223 (4 DI / 4 DO Relay) is the slimmest combo module in the S7-200 line. Because its output contacts are electromechanical relays, it can drive both AC and DC field loadssuch as small contactors, solenoid valves, alarms, and indicatorswithout needing interposing relays, making it ideal for small system expansions where panel space is at a premium