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Green circuit board with terminal blocks inside a compact grey DIN rail enclosure, status LEDs visible

LORDWORLD

LORDWORLD Modbus RTU IO Module 8DI 8DO RS485 DC 7-36V development board

SKU CH-0BK8-G2DSG

Industrial RS485 Modbus RTU module provides eight digital inputs with NPN/PNP support and eight 500mA open-drain outputs for PLC cabinets

  • 8 digital inputs with NPN/PNP support and debounce for reliable sensing
  • 8 open-drain outputs sink 500mA each with flyback protection for relays
  • RS485 Modbus RTU at address 1255 allows multiple modules on one bus
  • Wide DC 7-36V supply with isolation, TVS and resettable fuse
  • Compact 35mm DIN rail mount case with status LEDs for easy integration

Industrial Modbus RTU IO module

The LORDWORLD board provides eight digital inputs and eight digital outputs on a single RS485 link using the Modbus RTU protocol. It is designed for PLC cabinets and automation systems that need reliable remote I/O expansion without additional wiring complexity.

Replaces discrete wiring and basic relay boards

The module consolidates multiple sensor and actuator connections into one addressable node at address 1255, allowing several units to share the same bus. The jump is worthwhile when a project requires optocoupler isolation, built-in debounce on inputs, and 500 mA sinking outputs with flyback protection for inductive loads.

DIN rail mounting simplifies cabinet installation

The compact 35 mm rail case stacks cleanly and status LEDs give immediate visual feedback on power and communication. Common issues include incorrect RS485 termination, mismatched baud rates, and exceeding the 7–36 V supply range, which can trigger the resettable fuse.

Pontos fortes

  • 8 digital inputs with NPN/PNP support and debounce for reliable sensing
  • 8 open-drain outputs sink 500mA each with flyback protection for relays
  • RS485 Modbus RTU at address 1255 allows multiple modules on one bus
  • Wide DC 7-36V supply with isolation, TVS and resettable fuse
  • Compact 35mm DIN rail mount case with status LEDs for easy integration

Especificações

BrandLORDWORLD

Perguntas sobre este artigo

What width DIN rail does the 35 mm case clip onto?

The compact enclosure is designed for standard 35 mm DIN rail and supports stacking multiple modules side by side.

How do I set the Modbus address when cascading several modules on the same RS 485 bus?

Each unit ships with a default address of 1255; change it via the Modbus RTU registers before adding another module so every device on the bus has a unique address.

What protects the 500 mA open-drain outputs if a relay coil or inductive load is switched off?

Built-in flyback diodes on each Darlington output clamp the back-EMF, and a resettable fuse plus TVS devices guard the whole output bank against over-current and surges.

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