5V 4-Channel Relay Module with Optocoupler H/L Level Triger for Arduino
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: 73mm * 50mm* 18.5mm. Module interface specifications:1. DC+ : DC power supply positive pole2. DC- : DC power supply negative pole3. IN1~IN4 : relay signal triggering pin Relay output:1. Normally closed pin (NC1~NC4) : relay normally closed pin2. Common pin (COM1~COM4) : relay common pin3. 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: 1x relay module