SIEMENS 6EC1661-0A Description Description SIEMENS SIMATIC C1 PCB 4 OUTPUT RELAYS Related products SIEMENS 1FK7083-5AF71-1EB3 SIEMENS 1FT5072-0AC01-1-Z SIEMENS 1FK7042-5AF71-1EA0 SIEMENS 1FK7042-5AK71-1FB0 SIEMENS 1FK7063-5AF71-1FG2 SIEMENS 1FK7044-7AF71-1EG0