SIEMENS 6EC1661-0A Description Description SIEMENS SIMATIC C1 PCB 4 OUTPUT RELAYS Related products SIEMENS 1FK7011-5AK71-1TG3 SIEMENS 1FN3050-4SA00-0AA0 SIEMENS 1FN3150-4SA00-0AA0 SIEMENS 1790L811A SIEMENS 1FT5072-0AC01-0-Z SIEMENS 1FK7042-5AF71-1EA0