Description: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: 12VModule size: 73 x 50 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:10 x 4 Channel H/L Level Trigger Optocoupler Relay Module