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Green DIN-rail module with eight terminal blocks and three indicator LEDs

LORDWORLD

LORDWORLD 8CH PWM Modbus RTU RS485 Development Board

SKU CH-Q69H-CB7G3

Reads eight PWM channels over RS485 Modbus RTU with optocoupler isolation, 7-36 V DC supply, TVS and fuse protection, watchdog, DIN rail mounting and three status LEDs

  • Reads 8-channel PWM frequency and duty cycle via Modbus RTU
  • High-speed optocoupler isolation on all inputs for noise immunity
  • Isolated RS485 interface ensures reliable data in noisy environments
  • 7-36 V DC supply with integrated isolation needs no extra power module
  • Resettable fuse, TVS protection and watchdog in DIN rail housing

8-Channel PWM Modbus RTU Module

This LORDWORLD development board reads eight PWM pulse inputs and reports frequency and duty cycle data through an RS485 Modbus RTU interface. It targets engineers building industrial monitoring or automation systems that need reliable multi-channel signal acquisition.

Sustained Operation in Noisy Environments

High-speed optocoupler isolation on every input and an isolated RS485 port suppress electrical noise during continuous duty cycles. A 7-36V DC regulator with integrated isolation, resettable fuse, TVS transient suppression and a watchdog timer maintain stable operation without external isolated supplies.

Replaces Discrete Signal-Conditioning Hardware

The module consolidates eight isolated PWM readers, isolated communications and protection circuitry into a single DIN-rail housing that supports stacking. It is not suited for applications requiring analog voltage or current inputs, digital I/O expansion or wireless connectivity.

Highlights

  • Reads 8-channel PWM frequency and duty cycle via Modbus RTU
  • High-speed optocoupler isolation on all inputs for noise immunity
  • Isolated RS485 interface ensures reliable data in noisy environments
  • 7-36 V DC supply with integrated isolation needs no extra power module
  • Resettable fuse, TVS protection and watchdog in DIN rail housing

Specifications

BrandLORDWORLD

Questions about this item

Does the 7-36V DC supply and TVS-protected RS485 link run cool enough for continuous duty in a sealed cabinet?

The module draws little power and the DIN rail case vents passively; the on-board regulator and transient suppression handle surges without generating sustained heat, so it suits long-running installations.

What external items must I provide to read the 8-channel PWM frequency and duty-cycle registers?

A Modbus RTU master on RS485 and a 7-36V DC source are required; the board’s optocoupler-isolated PWM inputs accept the pulse signals directly, and the isolated RS485 port connects to the bus without extra converters.

Will the optocoupler-isolated PWM inputs and isolated RS485 port share a common ground with my existing 7-36V field devices?

Each PWM channel and the RS485 interface are individually isolated by high-speed optocouplers, so ground loops between legacy sensors and the module are broken while signals pass cleanly.

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