Description

This is a 4 Channel 3-24V Solid State Relay Module. A solid-state relay (SSR) is just what it sounds like; an IC that acts like a mechanical relay. They allow you to control high-voltage DC loads from lower voltage DC control circuitry. They accomplish this by using infrared light as the ??contact,?? a solid-state relay?is really just an IR LED and a photo Triac sealed up into a little box. Solid-state relays have several advantages over mechanical relays.
A?Solid State Relay?is similar to a mechanic relay where it can be controlled through a digital signal.?Solid State Relay?generates no noise and has a much longer lifespan compared to the traditional?mechanic relay.
One such advantage is that they can be switched by a much lower voltage and at a much lower current than most mechanical relays. Also, because there are no moving contacts,?solid-state relays?can be switched much faster and for much longer periods without wearing out.
Input Parts :

DC+: connected to VCC (Supply power according to relay voltage)
DC-: connected to GND
IN1: CH1 Signal triggering the end of 1-channel relay module (active at the high level)
IN2: CH2 Signal triggering the end of 2-channel relay module (active at the high level)
IN3: CH3 Signal triggering the end of 3-channel relay module (active at the high level)
IN4: CH4 Signal triggering the end of 4-channel relay module (active at the high level)

Features:

4-channel 2 AMP Solid State Relay board.
Control 4 loads of up to 2 amps each at 50 V DC.
Good for lighting, Holiday displays, etc.
Has been assembled, and the electrical test passed.
Led indicator for each relay.
Use it to control various appliances and other equipment with a large current.
It can be controlled directly by a Microcontroller

Package Includes:
1 x 4 Channel 3-24V Relay Module Solid State High-Level SSR DC Control DC with Resistive Fuse