Package included: 1 x 12V 2 channel relay driver module for arduino Features: Description: 1. The module uses genuine quality relay , normally open interfaces Maximum load : AC 250V/10A, DC 30V/10A 2. Using SMD OPTOCOUPLER isolation , driving ability , stable performance ; trigger current 5mA 3. The module voltage is 5V, 9,12 V, 24V are available 4. The module can be set to high or low triggered by jumper 5. Fault-tolerant design , even if the control line is broken , the relay will not operate 6. The power indicator ( green ) , relay status indicator ( red ) 7. Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient 8. Module size : 50mm * 40mm * 16mm ( L * W * H ) 9. Has four mounting bolts holes , hole 3.1mm Interface : 1. DC +: positive power supply ( voltage required by the relay , there 5V.9V.12V and 24V choice ) 2. DC-: negative power connection 3. IN1: 1 channel signal to trigger the end , you can set a high or low level control relay 3. IN2: 2 -channel signal to trigger the end , you can set a high or low level control relay Outputs : 1. NO1: After a relay normally open interfaces , relay before floating, shorted pull with COM1 2. COM1: 1 relay common interface 3. NC1: 1 relay normally closed port, COM1 relay shorted before and after the pull- vacant 4. NO2: 2 -way normally open relay interface, the relay before floating , pull back and COM2 short 5. COM2: 2 Common Interface relay 6. NC2: 2 -way normally closed relay interface relay short front and COM2 , pull vacant post High and low trigger selection : 1.S1 as a relay trigger selection of high and low ; 2.S2 high and low for the two -way relay trigger selection ; 3.com with low short circuit, triggering the corresponding relay is low , while the high end of the short com high trigger High and low trigger selection : 1.Short jumper with LOW triggered when connected

2 When the jumper is high with high short trigger