2 channel module with opto-coupler isolation support high and low level trigger 1 relay expansion board 5V12V

1, the module adopts high quality relay, normally open interface maximum load: AC 250V/10A, DC 30V/10A;.

2, the use of chip optocoupler isolation, drive ability, stable performance; trigger current 5mA;

3、Module working voltage has 5V12V

4, the module can be set through the jumper high level or low level trigger;

5, fault-tolerant design, even if the control line is broken, the relay will not act;

6, power indicator (green), relay status indicator (red)

7, interface design humane, all interfaces can be directly connected through the terminal leads, very convenient

8, with 4 fixed bolt holes, hole 3.1mm

Two module interface.

1、DC+：Connect the positive pole of the power supply (voltage according to the requirements of the relay)

2、DC-: connected to the negative pole of the power supply

3, IN: can be high or low level control relay suction

Relay output:

1、NO：Normally open relay interface, the relay is suspended before the relay is engaged, after the relay is engaged, it is shorted to COM.

2、COM：relay common interface

3、NC：Normally closed relay interface, shorted to COM before the relay is engaged, suspended after the relay is engaged.

High and low level trigger selection terminal:

1. Low level trigger when jumper is shorted to LOW.