Meet the E24v3 Module: a high-capacity, industrial-grade RS485 Modbus relay module built for reliable, large-scale control. Powered by an ARM CPU, this 24-channel powerhouse features pluggable OMRON® relays, extendable manual override buttons (up to 500 meters), and flexible 12/24V control logic. Designed as a dependable slave device for PLCs, building automation systems, or any Modbus master, the E24v3 delivers robust 16A switching across 24 channels in a rugged DIN-rail form factor. Whether you're expanding an existing system or building a new industrial control network, the E24v3 is the reliable workhorse you need.

Why You'll Love This Controller

✔ High-Capacity Industrial Modbus Slave
Designed as the perfect team player in any automation network. With 24 channels, standard Modbus RTU protocol ensures easy integration with PLCs, SCADA systems, building management controllers, and even home automation platforms like Home Assistant (via ESPHome Modbus controller).

✔ True Redundancy with Extendable Manual Override
A standout feature for critical applications. Place physical control buttons up to 500 meters away for a genuine automation bypass—essential loads can be manually operated even if the entire control network or master controller fails.

✔ Ultimate Flexibility in Control Logic
Three ways to command your relays—Modbus for centralized automation, direct HIGH/LOW level signals for simple hardwired control, or manual buttons for local override. The E24v3 adapts to your system architecture, not the other way around.

✔ Built for Harsh Industrial Environments
With a -40°C to +55°C operating range, OMRON® relays rated for millions of operations, and robust construction, this module delivers decades of reliable service in demanding settings like factories, greenhouses, or outdoor installations.

✔ Maintenance-Friendly Pluggable Relays
When a relay eventually reaches end-of-life after years of service, replace it in seconds—no soldering, no board replacement, no extended downtime. Your system stays operational while maintenance is performed.

✔ Simple Hardware Configuration
The intuitive DIP switch system makes Modbus addressing quick and error-free. Set your address, enable communication, and you're online—no complex software setup or programming required.

Among other outstanding features are the following:

• Extendable Manual Override Buttons: All 24 onboard buttons can be extended via cable up to 500 meters, enabling centralized physical control from anywhere in your facility—a true automation bypass feature for ultimate system redundancy.

• Pluggable OMRON® Relays: High-quality 16A SPDT relays (COM/NO/NC contacts) can be individually replaced without soldering, drastically reducing downtime and simplifying long-term maintenance.

• Flexible Triple-Mode Control: Operate via RS485 Modbus commands for centralized automation, direct HIGH/LOW level signals (12/24V) for hardwired simplicity, or manual buttons for local override—choose the method that best suits your application.

• Industrial-Grade Durability: Engineered for harsh environments with an extended operating temperature range of -40~55°C and relay ratings of 5 million+ mechanical / 100,000+ electrical operations.

• Simple Addressing with DIP Switch: 4-bit DIP switch enables easy hardware configuration of Modbus address (bits 1-3) and RS485 communication control (bit 4)—no software or programming required.

• Versatile Digital Inputs: Supports two wiring methods (trigger HIGH or LOW) for connecting sensors, switches, or external control signals directly to the module.

Technical Specifications: