Product description: 1 channel relay module Maximum load: AC 250V/10A, DC 30V/10A Trigger current: 5mA Working voltage: 5V Module size: 50 x 26 x 18.5mm (L x W x H) Four mounting bolts holes, diameter 3.1mm DC+: positive power supply (VCC) DC-: negative power supply (GND) IN: can be high or low level control relay NO: normally open relay interface COM: Common Interface Relays NC: normally closed relay interface 2 channel relay module 1 Dimensions: 50.5mm (length) * 38.5mm (W) * 18.5 (H) 2 Weight:. 31g 3.PCB Color: Black 4 board four weeks with four screws holes, hole diameter 3.1mm, easy to install and fixed 5 relay of high quality loose music relays SPDT. A common terminal, a normally open, one normally closed terminal 6 optocoupler isolation, good anti-jamming 7 low pull, high release. Energisation status indicator light, release status LED is off 8.VCC of system power, JD_VCC relay power. You can plug in jumpers Electrical parameters: Supply voltage: 5VDC, 12VDC Current: more than 100mA Load: 250V 10A AC or 30V 10A DC Wiring: VCC: positive power supply system GND: System power negative IN1 - IN2: relay control ports 4-channel relay output modules, relay output contacts 250A 10A. Input IN1, IN2, IN3, IN4, the signal line LOW effective. VCC, GND power input, can relay a separate power supply relay power input of JD-VCC. Uses: 1, support all MCU control. 2, the industrial sector; 3, PLC control; 4, smart home control 8 channel relay module Features Using high-current relay , AC250V 10A DC30V 10A Contact some independent wiring , safe and reliable Standard interface , can be extended in a variety of development board With fixed screw holes for easy installation Suitable for a variety of platforms such as 51/AVR/AVR/ARM Module Description : 1 , the module complies with international safety standards , the load control area and regional isolation tank ; 2, using double-sided FR-4 circuit board design, high-end chip production process ; 3, using loose music authentic relay control ; 4, with the relay instructions , pull off, disconnect does not shine ; 5, the signal input has a low signal , often beginning with a common terminal will be turned on ; 6 , the relay can control the various devices and the load ; 7 , 8 and 8 normally open normally closed contact ; 8 , blue KF301 terminals to the control line is more convenient. 9 , Module size : 138m * 56mm * 18.5mm ( L * W * H ) , Weight : 120g 10 with 4 fixing bolt holes , hole 3.1mm, pitch 131mm * 49.5mm 11 , finished by 100% functional testing and stability testing Two module interface : 1, VCC: 5V power supply connected to the positive 2, GND: 5V power supply connected to the negative 3, IN1-IN8: trigger signal , active low Relay outputs : a 12- line interface, the interface can be directly connected to all leads , user-friendly 1, NO1 - NO8: normally open relay interfaces , relay before the vacant after the pull shorted with COM