25821 - Waveshare 8-Channel 0-20mA Modbus Analog Input
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25821 - Waveshare 8-Channel 0-20mA Modbus Analog Input
Modbus RTU Acquisition Module with 8 Analog 0-20 mA Inputs
The Waveshare 25821 is an 8-channel Modbus RTU analog acquisition module, designed for 0-20 mA current measurements. It allows current analog sensors to be connected to an RS485 bus for supervision or data acquisition.
0-20 mA Current Analog Inputs
This version is designed for 0-20 mA current. It differs from the 25767 version, which is dedicated to 0-10 V voltage signals. It is suitable for industrial sensors using a current output.
Interfaces / Protocols / Integration
The module communicates via RS485 with the Modbus RTU protocol. It allows simultaneous acquisition of 8 analog channels with a 12-bit resolution.
Industrial Design
The 25821 supports 7-36 VDC power supply and DIN rail mounting. It integrates protection and isolation circuits for use in industrial environments.
Applications
It is suitable for 0-20 mA sensors, process measurements, industrial instrumentation, supervision, data acquisition, and connecting analog equipment to a Modbus system.
Highlights
- 8 analog 0-20 mA current inputs
- 12-bit resolution
- RS485 Modbus RTU interface
- Simultaneous acquisition of 8 channels
- 7-36 VDC power supply
- DIN rail mounting
| Specifications | |
|---|---|
External I/O |
8 analog inputs 0-20 mA, RS485, and Modbus RTU
|
Power Supply |
7-36 VDC
|
Mounting Type |
DIN rail
|
|
|
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Number of Serial Ports |
|
Supported Protocols |
Modbus RTU and RS485
|