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Dc 5v Single Channel No Nc Output Low Level Trigger Relay Module Plc For Arduino - Relays - AliExpress
Power relay - 4 contacts NO/C/NC - Coil 12VDC - delivered with Dinrail support Relais RD 12VDC : createlonline.com : Door phone IP SIP, on bus, on mobile network, on telecom line
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