IkElectro Store

This is a 8-channel LOW level trigger relay and it can be applied to Arduino and Raspberry Pi. Relays are suitable for driving high power electronic devices such as lights, electric fans and air condition. A relay can be used to control high voltages with a low voltage by connecting it to an MCU.

Principle of relay

See the picture below: A is an electromagnet, B armature, C spring, D moving contact, and E fixed contacts. There are two fixed contacts, a normally closed one and a normally open one. When the coil is not energized, the normally open contact is the one that is off, while the normally closed one is the other that is on.

Add a certain voltage to the coil and some currents will pass through the coil thus generating the electromagnetic effect. So the armature overcomes the tension of the spring and is attracted to the core, thus closing the moving contact of the armature and the normally open contact (or you may say releasing the former and the normally closed contact). After the coil is de-energized, the electromagnetic force disappears and the armature moves back to the original position, releasing the moving contact and normally closed contact. The closing and releasing of the contacts results in power on and off of the circuit.

Features

• Support control of 10A 30V DC and 10A 250V AC signals

• 5V 8-Channel Relay interface board

• LOW level trigger, equipped with indicator easy to recognize the working status

• Each relay has NO and NC ports, easier to connect and control the connected devices

• Selection of plastic material for high temperature and better chemical solution performance.

• PCB size: 5.7 x 13.8 cm

Ports Description

Input:

• VCC: Connected to positive supply voltage (supply power according to relay voltage)
• GND: Connected to negative supply voltage
• IN1: Signal(LOW Level) triggering terminal 1 of relay module
• IN2: Signal(LOW Level) triggering terminal 2 of relay module
• IN3: Signal(LOW Level) triggering terminal 3 of relay module
• IN4: Signal(LOW Level) triggering terminal 4 of relay module
• IN5: Signal(LOW Level) triggering terminal 5 of relay module
• IN6: Signal(LOW Level) triggering terminal 6 of relay module
• IN7: Signal(LOW Level) triggering terminal 7 of relay module
• IN8: Signal(LOW Level) triggering terminal 8 of relay module