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

Description

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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
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