3Pcs 5V 1 Channel Level Trigger Optocoupler Relay Module ForDescription The module uses genuine quality relay normally open interfacesUsing SMD optocoupler isolation driving ability stable performanceThe module can be high or low by a jumper setting triggerFault tolerant design even if the control line is broken the relay will not operateThe power indicator green the relay status indicator red The interface design of human nature all interfaces are available through a direct connection terminal leads very convenientSpecification Maximum load AC 250V 10A DC 30V 10ATrigger current 5mAWorking voltage 5VModule size 50 x 26 x 18 5mm L x W x H Four mounting bolts holes diameter 3 1mmModule interface DC positive power supply VCC DC negative power supply GND IN can be high or low level control relayRelay outputs NO normally open relay interfaceCOM Common Interface RelaysNC normally closed relay interfaceHigh and low level trigger options It is low level trigger when jumper connect to LOW pinIt is high level trigger when jumper connect to HIGH pinPackage included 3 x 1 Channel H L level trigger optocoupler relay module