2 Channel Relay Module Relay Board Expansion Board with Optocoupler Isolation High and Low Level Triggerfor Arduino 5V/12V/24V(24V)

2 Channel Relay Module Relay Board with Optocoupler Low Level Trigger Expansion Board for Arduino 5V/12V/24VSpecification: Working voltage: 5V, 12V, 24V(Optional) Max load: AC 250V/10A; DC 30V/10A Channel: 2 Product dimension: 50*41*18.5mm / 2*1.6*0.7in Power light: Green Relay light: Red Board color: RedPackage list: 1 * Relay ModuleNote: Module interface: 1. DC+: Connect the positive pole of the power supply 2. DC-: Connect power supply negative pole 3. IN1:1 signal trigger terminal, can set high or low level control relay suction 4. IN2:2 signal trigger terminal, can set high or low level control relay suctionRelay output: 1. NO1: 1 channel relay usually opens the interface. The relay is suspended before suction and short-connected with COM1 after suction. 2. COM1: 1 channel relay common Interface 3. NC1: 1 channel relay normally closed interface, short connection with COM1 before relay suction, suspension after suction 4. NO2: 2 channel relay often opens interface. The relay is suspended before suction, and is short-connected with COM2 after suction. 5. COM2: 2 channel relay common interface 6. NC2: 2 channel relay normally closed interface, short Connection with COM2 before relay suction, suspension after suction and low level trigger selector: 1. S1 is the trigger selection of high and low level relay. 2. S2 is the trigger selection of 2-way relay at high and low levels. 3 and low short connection, the corresponding relay is low-level trigger, com and high short connection is high-level trigger.