5V Two 2 Channel Relay Module w/ Optocoupler

Description

5V Two 2 Channel Relay Module  w/ Optocoupler

This is a 5V, 10A 2-Channel Relay interface board. It can be used to control various appliances, and other equipments with large current. It can be controlled directly with 3.3V or 5V logic signals from a microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).

It has a 1×4 (2.54mm pitch) pin header for connecting power (5V and 0V), and for controlling the 2 relays. The pins are marked on the PCB:

• GND – Connect 0V to this pin.
• IN1 – Controls relay 1, active Low! Relay will turn on when this input goes below about 2.0V
• IN2 – Controls relay 2, active Low! Relay will turn on when this input goes below about 2.0V
• VCC – Connect 5V to this pin. Is used to power the opto couplers

There is a second 1×3 (2.54mm pitch) pin header for supplying the “relay side” of the board with 5V. At delivery, a jumper is present on this header selecting the 5V signal from the 1×4 pin header to power the relays.