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Green ABS plastic case with eight relay modules and RS485 terminals

LORDWORLD

LORDWORLD 8-Channel Modbus RTU Relay Module RS485 10A development board

SKU CH-2ZP0-EJZRF

An 8-channel Modbus RTU relay module with RS485 communication, configurable addresses up to 255, 10A relay rating, and isolation protection for industrial control

  • Control 8 relays via Modbus RTU over RS485
  • Set device address 1-255 and cascade multiple modules
  • Power and magnetic isolation with TVS diode and resettable fuse
  • Timed flash-on/flash-off relay functions for automation
  • Rugged ABS case with 10A relays and optocoupler isolation

8-Channel Modbus RTU Relay Module

The LORDWORLD module provides eight independently addressable relays controlled over an RS485 bus using the Modbus RTU protocol. Each relay handles loads up to 10A, making the board suitable for switching industrial actuators, lighting circuits or small motors. A configurable device address from 1 to 255 allows many modules to share a single bus.

RS485 bus constraints and cascading

RS485 defines the electrical layer, so cable length, termination and baud rate must be planned by the installer; the module itself does not set those limits. Cascading multiple units is supported through address assignment, but total node count and bus loading remain the responsibility of the system designer. No Ethernet, Wi-Fi or other network interfaces are present on this board.

Rugged enclosure and rail mounting

The board is housed in a rugged ABS plastic case designed for DIN-rail installation inside control cabinets. High-quality relays and bi-directional optocoupler isolation protect the logic side from high-voltage transients on the field side. Power and magnetic isolation, a TVS diode and a resettable fuse add over-current and over-voltage protection. Multiple status LEDs show MCU and signal activity for quick diagnostics.

Highlights

  • Control 8 relays via Modbus RTU over RS485
  • Set device address 1-255 and cascade multiple modules
  • Power and magnetic isolation with TVS diode and resettable fuse
  • Timed flash-on/flash-off relay functions for automation
  • Rugged ABS case with 10A relays and optocoupler isolation

Specifications

BrandLORDWORLD

Questions about this item

How many relays does this module provide for my application?

The board includes eight relay channels, each rated for up to 10 A, giving you eight independently switchable circuits in a single rail-mounted unit.

What does the 10 A relay rating mean when the module is installed in a cabinet?

Each channel can switch resistive loads up to 10 A at the rated voltage, so you can directly control heaters, motors or lighting circuits without an external contactor.

How does the RS485 Modbus RTU link limit the number of modules I can daisy-chain?

The protocol supports device addresses from 1 to 255, allowing up to 255 modules on one bus segment while the RS485 electrical layer handles the multi-drop wiring.

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