485 interface Modbus protocol Open Type DC Voltage and Current Transmitte

 

1 Product Overview

DAQ-GP-DCHS485 transmitter and acquisition device is an industrial-grade compact, portable, fast, stable, and high-precision DC intelligent power transmitter launched by Shanghai Shucai Internet of Things Technology Co., Ltd. 

Application areas: Widely used in power, communication, transportation, environmental protection, petrochemical, steel and other fields to monitor the current or voltage consumption of AC and DC equipment. Standard RS-485 digital interface output to achieve interconnection with computers, PLCs, industrial gateways, touch screens and other host computers .

2 Ordering specifications and selection

Support special customization of three parameters: input range, output type, and working power supply

3 Service Concept

Our company solemnly promises:

You buy not only the product, but also the meticulous and thoughtful technical support service ! ! ! ( =^_^= )

This product only needs ordinary workers to connect the power and install it on site! No debugging is required!

We provide free remote guidance, remote configuration and debugging services, and send data to the user's designated cloud platform.

As an expert in industrial data collection, Shucai IoT provides free IoT solution consulting services!

4 Product characteristic parameters

4.1 Communication characteristics

Serial communication uses RS485. The default address is 1, the baud rate is 9600, 8, 1, and no checksum.

4.2 Terminal Definition

Facing 4p terminal : GND, 485 B , 485 A , + 12V (+E)

Terminal diagram:

4.3 Features

Adopt new electromagnetic isolation technology, photoelectric isolation technology, low power consumption

Industrial-grade imported chips, professional algorithms, high precision

With automatic thermal switch and ESD protection function

4.4 Electrical Characteristics

Working power supply: DC12- DC24V, DC

Power consumption: less than 5W

4.5 Work Environment

Working temperature: -20°~ 80°C

4.6 Installation

Standard rail installation, flat screw fixing, detachable split structure, PCB welding installation, etc.

5 Core advantages of products

u Simple installation and quick deployment help IoT projects to be implemented quickly

u Support external multi-channel sensors

u Non-intrusive collection, does not affect the normal operation of the equipment

 

6 Register Description

Register Address	Register contents	Number of registers	Register Status	Data Range
0056H	Single channel power	1	Read-only	0~10000
0010H	First circuit power	1	Read-only	0~10000
001 1 H	Second power supply	1	Read-only	0~10000
001 2 H	The third way power	1	Read-only	0~10000
00 57 H	address	1	Read/Write	00H - FFH
00 20 H	Baud rate	1	Read/Write	03H – 0BH

Note: 1. When the transmitter input is dual-channel, take the first channel power and the second channel power. 2. For the transmitter input is a dual-channel input of current and voltage combination, the first channel is voltage data and the second channel is current data. 3. For transmitters with two or three channels and other multi-channel inputs, if you need to read a certain channel power separately, you only need to read the register corresponding to that channel separately, and set the number of registers to 1. (For example: Now you only need to read the third channel power, and do not want to read the first and second channels, send the download command: 01H 03H 00H 12H 00H 01H

6.1 Single input transmitter read data command example

Slave Address	Function code	Starting register address		Number of registers		CRC	CRC
01H	03H	00H	56H	00H	01H	64H	1AH

 

return:

Slave Address	Function code	Starting register address	A/DH	A/DL	CRC	CRC
01H	03H	02H	24H	F6H	23H	02H

6.2 Dual Input Transmitter

From the machine	Function code	Number of starting registers		Number of registers		CRC	CRC
01H	03H	00H	10H	00H	02H	C5H	CEH

return

Slave Address	Function code	Number of bytes in the data area	D		Second power supply		CRC	CRC
			A/D-H1	A/D-L1	A/D-H2	A/D-L2
01H	03H	04H	1FH	3FH	0AH	74H	CBH	6CH

 

6.3 Three-way input transmitter

Slave Address	Function code	Starting register address		Number of registers		CRC	CRC
01H	03H	00H	10H	00H	03H	04H	0E

return:

Slave Address	Function code	Number of bytes in the data interval	First circuit power		Second channel power		The third way power		CRC	CRC
			A/D-H1	A/D-L1	A/D-H2	A/D-L2	A/D-H3	A/D-L3
01H	03H	06H	1EH	AFH	1EH	1CH	1EH	B1H	F8H	E9H

 

6.4 Modify address

Slave Address	Function code	Starting register address		Number of registers		Number of data bytes	Data written to the register		CRC	CRC
01H	10H	00H	57H	00H	01H	02H	00H	02H	2AH	76H

return:

02H

10H

00H

57H

00H

01H

B0H

2AH

 

6.5 Modify the baud rate

Slave Address	Function code	Starting register address		Number of registers		Number of bytes	Data to be written to the register		CRC	CRC
01H	10H	00H	20H	00H	01H	02H	00H	05H	61H	33H

6.6 Baud rate encoding

03H	1200 bps
04H	2400 bps
05H	4800 bps
06H	9600 bps
07H	19200 bps
08H	28800 bps
09H	57600 bps
0A	38400 bps
0B	115200bps
Broadcast Address	FA

7  Application Cases