4-Channel 12V Relay Module with Optocoupler H/L Level Triger for Arduino #JT1

ITEM NAME:4-Channel 12V Relay Module with Optocoupler H/L Level Triger for Arduino #JT1 Product Description Description: Module description: 1. Maximum load on normally open pin: AC 250V/10A, DC 30V/10A. 2. Trigger current 5mA; 3. Module can be set high level or low level trigger by jumper wire; 4. Power indicator light (green), relay status indicator light (red); 5. Module size: Approx. 73mm * 50mm* 18.5mm. Module interface specifications: 1. DC+ : DC power supply positive pole 2. DC- : DC power supply negative pole 3. IN1~IN4 : relay signal triggering pin Relay output: 1. Normally closed pin (NC1~NC4) : relay normally closed pin 2. Common pin (COM1~COM4) : relay common pin 3. Normally opened pin (NO1~NO4) : relay normally opened pin High or low level trigger option: 1. S1~S4:They are option switch for relay 1~4; 3. It is low level triger if COM pin connect to LOW pin; It is high level triger if COM connect to High. Included: 1 x Relay Module.S1~S4:They are option switch for relay 1~4; 3. It is low level triger if COM pin connect to LOW pin; It is high level triger if COM connect to High. Power indicator light (green), relay status indicator light (red);.