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- Last added
- 2026-10-01
Featured Kunhang manuals
Kunhang KHDQ Series RS485 Modbus Digital I/O and Relay Output Module User Manual
This manual introduces the Kunhang KHDQ series module, a RS485‑based Modbus digital I/O and relay output device. It details power requirements, physical dimensions, operating temperature, and typical application areas such as HVAC, switch monitoring and remote control.
The document provides a full register address table, wiring diagrams for digital inputs, transistor and relay outputs, and sample Modbus code for reading and writing channels. It also describes the provided configuration software and how to set device address, baud rate and parity. This manual is written in Chinese.
Covers: Overview · Product Images and Interfaces · Function Codes and Register Addresses · Application Areas · Wiring Methods · Code Annotations
Latest Kunhang manuals
Kunhang KHDQ Series RS485 Modbus Digital I/O and Relay Output Module User Manual
User Manual 11 pages · 1.5 MB · ZHThe Kunhang KHDQ series RS485 Modbus digital I/O and relay output module user manual explains features, wiring, register map and code examples.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in Kunhang manuals
What is the power supply voltage range for the module?
The module operates from a DC power supply of 8 V to 30 V.
From: Kunhang KHDQ Series RS485 Modbus Digital I/O and Relay Output Module User Manual
What is the default relay supply voltage and coil power consumption?
Relays are powered by 24 V DC by default, and each coil consumes 0.36 W when energized.
From: Kunhang KHDQ Series RS485 Modbus Digital I/O and Relay Output Module User Manual