8-Channel 24V Relay Module Active Low
The 8-Channel 24V Relay Module (Active Low) provides eight independent relay channels for controlling multiple devices using 24V DC low-level trigger signals. Each relay activates when its input pin receives a low logic signal, making it compatible with systems configured for active low control. It works seamlessly with Arduino, Raspberry Pi, ESP32, STM32, and PLC systems, making it a reliable solution for large-scale home automation, industrial control, robotics, and IoT projects requiring multiple loads to be managed simultaneously.
This module supports AC loads up to 250V/10A and DC loads up to 30V/10A per channel, enabling safe and efficient operation of appliances, pumps, motors, solenoids, and industrial devices. Built-in opto-isolators enhance safety by separating control logic from high-power circuits, while flyback diodes protect microcontrollers and PLCs from harmful voltage spikes generated by relay coils.
Key Features
Provides eight relay channels with 24V DC active low inputs.
Supports AC loads up to 250V and 10A per channel.
Handles DC loads up to 30V and 10A per channel.
Opto-isolators ensure safe separation of control and load circuits.
Flyback diodes protect controllers from voltage spikes and surges.
Works with Arduino, Raspberry Pi, ESP32, PLCs, and more.
Screw terminals allow stable wiring for multiple load connections.
Applications
Controls multiple appliances such as lamps, fans, and AC devices.
Interfaces microcontrollers with higher voltage circuits for automation.
Drives motors, pumps, and solenoids in industrial environments.
Supports IoT projects with large-scale load management needs.
Enables smart home automation with multiple controllable channels.
Provides automation in robotics requiring coordinated multi-load switching.
Integrates into factory or workshop automation for reliable control.
Specifications Table
| Parameter | Value |
|---|---|
| Module Type | 8-Channel Relay Module |
| Operating Voltage | 24V DC |
| Input Trigger | Active Low |
| Relay Coil Voltage | 24V DC ‘ |
| Isolation | Opto-isolators included |
| Maximum Load (AC) | 250V AC / 10A per channel |
| Maximum Load (DC) | 30V DC / 10A per channel |
| Input Control Current | ~15–20 mA per channel |
| Terminals | Screw type for secure wiring |
| Dimensions | ~140 × 90 × 18 mm |
| Weight | ~120–140 g |

























