1. DC 12V power supply (voltage range 9-13V) 3. RS232 DB9 female interface 2. Standby current (all relays closed) 18MA, 1-way relay "open" 50MA, 2-way relay "open" 81MA, 3-way relay "open" 110MA, 4-way relay "open" 141MA Four-channel serial relay: 4. Read, open, close, self-lock, jog, interlock 6 instructions, can meet most industrial control occasions, Weight: 0.14770971554 pounds, Manufacturer: Aboiled
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