ABB Communications Supplement - AWT420 Universal 4-Wire, Dual-Input Transmitter MODBUS Connection Configuration and Reference Tables
Summary
The AWT420 is a versatile, dual-input transmitter designed for monitoring crucial parameters—such as pH and conductivity—in municipal and industrial water/wastewater treatment facilities. This communications supplement provides essential technical guidance for integrating your unit using the MODBUS protocol. It covers detailed connection configurations, signal status registers, and comprehensive troubleshooting information, making it an indispensable resource for automation engineers and technicians who require reliable system connectivity within their facility infrastructure.
Manual Details
| Brand | Dual |
|---|---|
| Pages | 32 |
| File Size | 1.47 MB |
| Published | June 06, 2026 |
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Frequently Asked Questions
How many sensors can the AWT420 transmitter monitor simultaneously?
The AWT420 is a dual-input transmitter that enables it to control and display information from up to 2 sensors.
Which communication protocol should I use for configuring the AWT420?
It supports MODBUS connections, which are detailed in the communications supplement. RS485 is listed as one primary connection method.
Where can I find instructions for installing or maintaining attached sensors?
For sensor-specific details including commissioning and maintenance procedures, you must refer to the respective specific sensor manual.
What compliance information is provided regarding disposal and safety?
The document covers product recycling and disposal (Europe only), as well as guidelines concerning potential safety hazards and ROHS requirements.