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The power indicator (green), the relay status indicator ;. NO: Relay normally open. COM: Relay Common Pin. NC: Relay normally closed. Module size: 50mm x 26mm x 18.5mm (L x W x H). When ' °IN ' ± input High Level Signal, the ' °NO ' ± connect with ' ±COM ' ± When ' °IN ' ± input Low Level Signal, the ' °NC ' ± connect with ' °COM ' ±.
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