The board is surrounded by four fixed screw holes with a diameter of 3.1 mm, which is convenient for installation and fixing.
High quality relay, single-pole double-throw. One common end, one constant beginning, one constant closing end.
Photocoupler isolation, good anti-interferenceLow level suction, high level release. The state indicator lights up when sucking in and out when releasing.
Wiring instructions:
VCC: Positive Pole of System Power Supply
GND: Negative Electrode of System Power Supply
IN1-IN2: Relay control port
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