Siemens Simatic ET 200SP Signal relay module, 4 c/o contactsProduct Overview SIMATIC ET 200SP Signal relay module featuring 4 changeover contacts with 24V DC 2A ST rating. This compact module provides isolated contacts with substitute value output capability and comprehensive module diagnostics for supply voltage monitoring. Designed for BU type A0 with Colour Code CC00. Key Features 4 changeover contacts (CO) with galvanic isolation 24V DC operation with 2A switching capacity Substitute value output