Module description:
1. Power indicator light (green), relay status indicator light (red);
2. Module Size:45x40x18.5mm;

Module interface specifications:
1. VCC : DC power supply positive pole
2. GND :DC power supply negative pole
3. IN1 : channel 1 signal triggering pin
4. IN2 : channel 2 signal triggering pin
5. VCC1 : Relay power supply side alone
If VCC connect to VCC1, relay and trigger pin use same power supply.

Relay output:
1. Normally closed pin (NC1) : channel 1 relay normally closed pin
2. Common pin (COM1) : channel 1 relay common pin
3. Normally opened pin (NO1) : channel 1 relay normally opened pin
4. Normally closed pin (NC2) : channel 2 relay normally closed pin
5. Common pin (COM2) : channel 2 relay common pin
6. Normally opened pin (NO2) : channel 2 relay normally opened pin