2 Channel 5V Relay Module with 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).

Relays are important part of any electrical and electronic circuits. We use relays in control applications, switching applications, circuit protection applications and load transfer applications. Relays are also used to provide electrical isolation between two circuits. This 2-channel Relay module comes with Optocoupler protection is an active low relay module which means that the relay will conduct when the input signal falls below 2V and if it is above 2V then the relay is turned off you can also make it an active module by changing the jumper position on the power module. It can be controlled directly with both 3.3V and 5V microcontrollers easily and dual channel enables you to control two applications at a same time which can come very handy if you want to control the direction of rotation of DC motor with your relay.

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

Product Description:-

Specification:-

• High current relay, AC250V 10A, DC5V 10A
• 2 LEDs to indicate when relays are on
• Works with logic level signals from 3.3V or 5V devices
• Opto isolation circuitry

Features :

1. 2 LEDs to indicate when relays are ON.
2. Module with diode current protection, short response time
3. Around the board with 4 mounting holes, hole diameter 3. 1 mm, easy installation and fixing

About high level and low level-triggered mode:

1. High-level trigger refers to the signal voltage between input and trigger, can be understood as a signal input with VCC cathode short-circuit triggered a way;
2. Low-level trigger refers to the signal voltage between the input terminal and Earth OV trigger, can be understood as the signal input terminal and the GND negative electrode short circuit triggered away  1-channel relay module connection