4-Channel Digital Weight Transmitter RS485 Modbus RTU Load Cell Signal Converter 10-28VDC for PLC Industrial Control

Specifications

Brand Name

YANJIUKEJI

High-concerned chemical

None

Origin

Mainland China

Output

Digital Sensor

Theory

Resistance Sensor

Type

Optical-Electronics Sensor

is_customized

Yes

Use

Pressure Sensor

Material

Polymer

Power Supply

10-28V DC

Power Consumption

< 2W

Operating Current

Depends on sensors; drive capacity 500 mA

Operating Temperature

-40~85°C

Humidity

0-95% RH, non-condensing

Protection Level

IP65

Excitation Voltage

5VDC ±3%

Channels

2-4 load cell inputs

Resolution

1/500,000

Sampling Rates

10Hz, 40Hz, 640Hz, 1280Hz

Communication Interface

RS485, Modbus RTU, Function Codes 03/06/16

Baud Rates

2400*600000 bps (configurable via DIP or software)

Addresses

1-255, broadcast = 254

Sensor Drive

Up to 4 X 350Ω sensors per channel

ADC Type

Sigma-Delta

Isolation & Protection

Optical isolation, power isolation, surge protection

Mounting

DIN rail or fixed mounting

Product Description

Parameter	Specification
Power Supply	10–28V DC, <2W
Operating Current	Depends on connected sensors, max drive 500mA
Channels	2–4 load cell inputs
Sensor Excitation	5V DC ±3%
Sensor Drive	Up to 4 × 350Ω sensors per channel
Input Signal Range	0 to ±30 mV
Resolution	1/500000
Sampling Rates	10Hz, 40Hz, 640Hz, 1280Hz (selectable)
ADC Type	Sigma-Delta
Communication	RS485, Modbus RTU, Function Codes 03/06/16
Baud Rates	2400–600000 bps (configurable via DIP or software)
Slave Address	1–255, broadcast = 254
Isolation & Protection	Optical isolation, power isolation, surge protection
Operating Temp	–40 to +85°C
Humidity	0–95% RH (non-condensing)
Protection Level	IP65
Mounting	DIN rail or fixed mounting
Weight	~250g

Communication Interface

The transmitter provides RS485 communication with standard Modbus RTU protocol, ensuring compatibility with PLCs, DCS, and industrial PCs.

Specifications:

Item	Specification
Interface	RS485 (2-wire differential)
Protocol	Modbus RTU
Supported Function Codes	03 (Read), 06 (Write Single Register), 16 (Write Multiple Registers)
Baud Rate Options	2400, 4800, 9600, 19200, 28800, 38400, 57600, 115200, 128000, 230400, 256000, 460800, 500000, 512000, 600000 bps
Slave Address (software)	1–255 (default = 1), broadcast = 254
Slave Address (DIP)	0–15 (DIP switch configuration)
Default Settings	Baud rate: 115200, Data bits: 8, Stop bit: 1, Parity: None, Address: 1, Byte order: Little-endian (2143)

RS485 Cabling:

Maximum distance: up to 1200 m at 9600 bps.

For short-distance debugging, ordinary cables are acceptable. For longer runs, use shielded twisted pair cables.

For multi-drop connections, connect a 120Ω termination resistor across A and B at the end of the line.

Indicators & Reset:

P (Power): Always ON when powered.

G (Comm): Blinks during communication (frequency depends on baud rate).

T (TX): Blinks when transmitting.

R (RX): Blinks when receiving.

Reset button: Hold >3s to restore factory defaults (⚠ clears calibration data).

Common Questions

What power supply for this 4-Channel Digital Weight Transmitter?

10-28VDC, <2W consumption, IP65 protection.

How many load cells per channel on this RS485 Modbus converter?

Up to 4 x 350Ω sensors per channel, 2-4 channels total.

Compatible communication for PLC industrial control?

RS485 Modbus RTU, baud 2400-600000bps, addresses 1-255.

What resolution and sampling rates for weight signals?

1/500,000 resolution, rates 10Hz to 1280Hz.

Mounting and temperature range for this load cell converter?

DIN rail mount, -40~85°C operating temp.

Specifications

Product Description

Communication Interface

Pros & Cons

Pros

Cons

Common Questions