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Electronics-Salon DIN Rail Mount 4 DPDT Signal Relay Interface Module, DC 5V Version. auspowers_batchone Premium high tack 34-Inch maskingElectronics Salon DIN Rail Mount 4 DPDT Signal Relay Interface Module, DC 5V Version. August 24, 2018, upgrade to version 2. 04 DPDT signal relay module. TAKAMISAWA RY5W K high quality relays, switch contact material gold overlay silver palladium. Darlington transistor circuits drive relay coil, LED indicator for each relay channel. High quality screw terminal block. FR 4 fiber glass PCB, dual copper layers. Taiwan DINKLE fireproof nylon material DIN