DC 5V 4 Channel Relay Module Board with Optocoupler Isolation,Support Development Board Compatible High or Low Level,Trigger

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.Main Specifications Connector Peak Load NO: AC 250V/10A, DC 30V/10A; Trigger Current: 5mA; Module Operating Voltage: 5V.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.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.Wide Application This 5V relay board works well with ARM/PIC/AVR/MCU/Raspberry/CNC machines, etc.