Product Name:DC 5-24V 2A Self-locking bistable Reverse Polarity Switch Controller Relay Board 
 
 
 
Package inlcuded:
1 PCS  DR55B01 DC 5V-24V Self-locking (bistable) reverse polarity controller
 
 
Description:   
Self-locking (bistable) reverse polarity Relay controller
    
1 Input Voltage: DC 5V(5V version); DC 6-24V(12V version)
2 Module working current : Forward 2ma;Reverse: 35-40ma;
3 Load voltage: Equal to input voltage
4 Load current: Maximum 2A(Motor <=1A)

5 Power indicator AND reverse polarity indicator
6 Control method : low pulse trigger
(0.2-2 seconds)
7 Size: 43mm X 21mm X 16mm
8 Weight: 13.5 g


This is a bistable (self-locking) Reverse polarity relay module,Trigger once, Output reverse polarity (and holds);Trigger again,the output=input (and holds)

Pin description: 
I+ :Power Input +;
I-  :Power Input -;
O+:Power Output +(When reversed is Power Output -);
O- :Power Output -(When reversed is Power Output +);
G:trigger signal input  ground;
T:trigger signal input terminal(0.2-2 second low pulse trigger).


Note:
1 For the module to work stably, be sure to use a power supply with sufficient current.Power supply current is greater than 2 times load current
2 The maximum load current is 2A, if it is a motor, the maximum load current is 1A
3 Can only control forward and reverse(Start and stop by power on and power off control)


How to use:
Power-on, the output=input, press the trigger button, Reverse polarity output, press again,  the output=input, the third press, Reverse polarity output, and so on.
Turn off the power and stop output