Module 8 relays 5V with optocoupler for ARDUINO

The five-volt eight-channel relay module is designed to control up to eight power loads via Arduino or other controllers.

To use a relay module, you need to connect a controlled device to it. Then you need to connect 5V power to the Vcc and Gnd pins of the module. After that, you can connect a microcontroller, computer or other control device to the control terminals IN1-IN8 of the relay module and start working.

The relay module has two interfaces - for connecting the control microcontroller and for connecting controlled devices to the relay. A 10-pin connector is used to connect the relay module to the control device. Contacts GND and VCC for connecting the supply voltage 5V, outputs IN1-IN8 for connecting the control signal.

To connect the load to the relay, there are 24 screw contacts on the board, 3 for each relay.
The relay module can be powered both from the control controller and from external power sources. If full galvanic isolation is required, connect Vcc to the Arduino's +5V output, but do not connect GND. Remove the Vcc-JDVcc jumper. Connect separate +5V to the JDVcc and GND pins on the board to power the transistors and relay coil.

Specifications:
relay operating current: 10 - 15mA (each)
relay supply voltage 5V
relay SRD-05VDC-SL-C AC250V 10A
overall size: 138 x 56 x 18 mm.