KNACRO 4-Channel Relay Module DC 12V with Optocoupler Isolation H/L high/Low Level Triger for Arduino

Description

1. the module uses genuine quality relay, normally open interfaces Maximum load: AC 250V/10A, DC 30V/10A; 2. using SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA; 3. the module Operating voltage 12V; 4. the module can be high or low by a jumper setting trigger; 5. fault-tolerant design, even if the control line is broken, the relay will not operate; 6. the power indicator (green), the relay status indicator (red) 7. the interface design of human nature, all interfaces are available through a direct connection terminal leads, very convenient 8. module size: 73mm*50mm*17mm (L*W*H) Module interface: 1. DC+: positive power supply (VCC) 2. DC-: negative power supply (GND) 3. IN1,IN2,IN3,IN4: can be high or low level control relay S1,S2,S3,S4, HIGHT OR LOW LEVER Relay outputs: 1. NO1,2,3,4: normally open relay interface 2. COM1,2,3,4: Common Interface Relays 3. NC1,2,3,4: normally closed relay interface High and low level trigger options: It is low level trigger when jumper connect to LOW pin It is high level trigger when jumper connect to HIGH pin Package: 1*12V 4CH relay module