Isolation Optocoupler Supporting Trigger Development Board Compatible High or Low Level DC12V 4 Channel Relay Module Shield Board

Main Specifications Connector Peak Load NO: AC 250V/10A, DC 30V/10A; Trigger Current: 5mA; Module Operating Voltage: 12V.This relay board Max load: AC 250V/10A, DC 30V/10A with power and relay action indicator. Each relay has a normally open and normally closed contact. Can be selected by jumper and TTL or ground relay.Using SMD optocoupler insulation, strong driving ability, stable performance. Fault-tolerant design, even if the command line is broken, the relay will not work; And the humanized interface design, all interfaces can be directly connected via the terminal cable, so convenient.These relay boards use photocoupler insulation which has strong driving ability and stable performance. The isolation circuit prevents damage to the I/O port by the switching current of the relay. The module has a jumper so you can set the unit state changes with a high or low signal instead. Has screw terminals for relay (NC, C, NO) and for input; Coil+, coil - and trigger.Wide Application This 12V relay board works well with ARM/PIC/AVR/MCU/Raspberry/CNC machines, etc.