Product descriptionMaterial: Electronic materialSize: 50.5mm(length)*38.5mm(width)*18.5(height)Power supply voltage: 5VDCCurrent: more than 100mALoad: 250V 10A AC or 30V 10A DCThere are 4 fixing screw holes around the board, the hole diameter is 3.1mm, which is convenient for installation and fixingThe relay chooses Songle relay, single pole double throw. One common terminal, one normally open terminal, one normally closed terminalOptocoupler isolation, good anti-interferenceLow level pulls in and high level releases. The status indicator light is on when it is closed, and it is off when it is releasedVCC is the system power supply, and JD_VCC is the relay power supply. Just plug in the jumper capWiring instructions:VCC: system power positiveGND: system power negativeIN1--IN2: Relay control portQuantity: 1pcsPackage content: 1*5V8 relay1.5V 8-Channel Relay interface boardeach one needs 100mA Driver Current; Equiped with high-current relay, AC250V 10A ; DC30V 10A2.Each relay has normally open and normally closed contactCan be selected by jumper relay and TTL or ground.3.With power indicator8-way road has a status indicator. With a relay coil to absorb the diode protection.4.Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)5.The 8 channels are optically isolatedsafe, reliable, anti-interference. Widely used for all MCU control, industrial sector, PLC control, smart home controlFor a complete data sheet for this relay board