SIMATIC S7-400, DIGITAL OUTPUT SM 422, POTENTIALLY ISOLATED 16 DA AC 5..230V, 5A RELAY SIMATIC S7-400, DIGITAL OUTPUT SM 422, POTENTIALLY ISOLATED 16 DA, AC 5..230V, 5A RELAY SIMATIC S7-400 digital module output SM 422, DO 16xUC 30/230 V/relay/5 A