SOLID STATE RELAYS - SSRS 1-POLE PANEL MOUNT SSR, ZERO-CROSS SWITCHING WITH SYSTEM MONITORING AND NORMALLY CLOSED PNP ALARM OUTPUT, OPERATING VOLTAGE (UE): 180 - 530 VAC (1200 VP), RATED CURRENT (IE): 25 AAC, CONTROL VOLTAGE (UC): 7 - 32 VDC, EXTERNAL SUPPLY: 20 - 32 VDC