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Jtron 1 Channel Opto-isolated Relay Module / Isolation Module - Black
1. Four weeks of the board with four screws holes£¬ hole diameter 3.1mm£¬ easy to install and fixed 2. Relay made of high quality loose music relays SPDT. A common terminal£¬ a normally open£¬ one normally closed terminal 3. Optocoupler isolation£¬ good anti-jamming 4. Low pull£¬ high release. Energisation status indicator lights D1£¬ D1 status lights off when you release 5. VCC of system power£¬ JD_VCC relay power. Default hair 5V relay£¬ you can plug in jumpers 6. Relay Maximum output: DC 30V/10A£¬ AC 250V/10A Wiring: VCC: positive power supply system GND: System power negative IN1: relay control ports