3v Relay Board Power Switch Relay Module 1 Channel Optocoupler Opto Isolation High Level Trigger for IOT ESP8266 Development Board 6Pack

Specification: Channel: 1 channel Material: Circuit board Control signal: TTL Work voltage: DC 3V/3.3V Main chip: EL817, SRD-DC03V-SL-C Compatible Load:10A 250VAC, 10A 30VDC Response time :Less than 20 milliseconds Single Socket Length: 7.5:mm Relay Size: 70mm X17mm X20mm (LxWxH) Power interface: 1. VCC: positive pole of power supply (3v/3.3v) 2. GND: connect to the negative pole of the power supply 3, IN: high level control relay suction Load interface: 1. NO: normally open interface of the relay. The relay is suspended before suction and shorted with COM after suction 2. COM: common interface of relay 3. NC: normally closed interface of relay, short connection between relay and COM before suction and suspension after suction. Note: 1. If you're switching high voltages, be very careful handling this device. The terminal block screws, in particular, are at full controlled voltages. Turn off all power off before making changes. 2.When the jumper cap connected, the relay working power supply will also as the signal power supply, when not connected, the relay and signal power supply is isolated. 100% Satisfaction Guarantee: 12-Month Warranty; No satisfied, Free reason for return; Quality problem, please contact us, we will resend your FREE Replacements or make you FULL Refund. Package include: 6 pcs x1 Channel 3v Relay Board