Beijing Juying Aoxiang Electronics JY-RTU-6640 RTU Quick User Manual

This quick user manual provides hardware connection, configuration, and communication setup instructions for the JY-RTU-6640 remote terminal unit.

Brand: Beijing聚英翱翔电子
Document type: Quick Start Guide
Language: Chinese
Pages: 13
File format: PDF
File size: 441 KB
Published: 10 April, 2012
Updated: 28 September, 2026
MD5 checksum: 1249F10463CABDA9E2A2D4B69BC43656
PDF: Beijing Juying Aoxiang Electronics JY-RTU-6640 RTU Quick User Manual PDF

About this manual

The manual describes how to install and configure the JY-RTU-6640 RTU. It covers hardware wiring, power requirements, digital and analog I/O pin assignments, and the communication interfaces (RS232, RS485, Modbus).\n\nKey sections include analog signal wiring (4‑20 mA and 0‑30 V), telephone/SMS alarm setup, GPRS network configuration, and remote parameter management. The document also lists Modbus register addresses for monitoring and control. This manual is written in Chinese.

What's inside

Hardware Connection
Function Structure
Communication Interface
Analog Input Configuration
Digital Output Configuration
Current and Voltage Measurement
Phone and SMS Configuration
GPRS Configuration
Remote Parameter Configuration

Specifications

Supply voltage range	5‑37 V
Analog input voltage range	0‑30 V
Current loop input range	4‑20 mA
RS485 termination resistor	200 Ω
Communication interfaces	RS232, RS485 (Modbus)

Frequently asked questions

How do I connect the RTU to an RS485 network?

You need an external RS485 converter, which must be purchased separately.

What is the allowed supply voltage for the JY-RTU-6640?

The device operates with a supply voltage between 5 V and 37 V.

How do I enable SMS alerts for alarms?

Enable the “短信使能” option in the basic settings; if GPRS mode is also enabled, SMS alerts will be sent to the configured server.

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