Delta RTU-485 Modbus Remote I/O Communication Module Application Manual

About this manual

This manual describes the Delta RTU-485 Modbus remote I/O communication module, its features, and how to install and operate it safely. It includes safety warnings, wiring, address setting, and configuration of communication parameters.

Key sections cover hardware dimensions, LED indicator meanings, error codes, supported Modbus function codes, and example applications with DVP‑28SV PLCs. Technical specifications such as power supply, communication interface, I/O capacity, and environmental limits are also listed. This manual is written in Chinese.

What's inside

• RTU-485 Introduction
• RTU-485 Unit Components
• RTU-485 Basic Operation
• Function Area Description
• Supported Function Codes
• Application Examples
• LED Indicators and Troubleshooting
• Power and Environmental Specifications

Specifications

Frequently asked questions

How do I set the communication address on the RTU-485?

Use the address‑setting switch; valid addresses are H'01 to H'F0 (decimal 1‑240).