1 Channel Way DC 5V Relay Protector Board Module Board with Optocoupler High Low Support for Arduino Trip Level 1CH The module uses genuine high quality relay, the normally open interface maximum load: AC 250V/10A, DC 30V/10A Using patch optocoupler isolation, strong driving ability, stable performance; 5mA trigger current The module can be triggered by a jumper to set a high or low level. Fault-tolerant design, even if the control line is broken, the relay will not move; Power indicator (green), relay status indicator (red) Interface design is user-friendly, all interfaces can be directly connected through the terminal block, very convenient Module description: The module uses genuine quality relay, normally open interfaces Maximum load: AC 250V/10A, DC 30V/10A SMD optocoupler isolation, strong driving ability, stable performance; 5mA trigger current The module voltage 5V The module can be set high or low triggered by jumper Fault-tolerant design, even if the control line is broken, the relay will not work Power indicator (green), relay status indicator (red) User-friendly interface design, all interfaces are available through the wiring terminal direct connection cables, very convenient Module size: 50mm*26mm*18.5mm (L*W*H) 4 fixing holes, hole 3.1mm, spacing of 44.5mm*20.5mm Module interface DC+: positive power supply (voltage by relay , 5V.9V.12V and 24V selection) DC-: a negative IN: can be high or low level control relay Relay outputs NO: normally open relay interfaces, relay before pull-in, pull-out and COM shorted COM: relay common interface NC: relay interfaces normally closed, relay and COM shorted before, after pull-vacan Package included: 5 x 5V One Way Relay Module