Yokogawa B9901AX00 Communication Unit | for UT35A, RS-485, Modbus RTU

Yokogawa B9901AX00 Communication Unit | for UT35A, RS-485, Modbus RTU

Yokogawa B9901AX00 specifications. Communication unit for UT35A controller, RS-485 port, Modbus RTU protocol.

Product Overview

The Yokogawa B9901AX00 is a communication interface unit for the UT35A series indicating controller. It adds an RS-485 serial communication port to the controller, enabling data exchange with external systems such as PLCs, SCADA, or other master devices using the Modbus RTU protocol. This allows for remote monitoring, configuration, and data acquisition from the UT35A controller.

Technical Specifications

Key Features

• Modbus RTU Connectivity:​ Enables integration into standard industrial networks

• Remote Access:​ Allows reading of process values (PV), setpoints (SV), and alarms

• Easy Installation:​ Module installs internally within the controller housing

• Configurable Parameters:​ Baud rate, parity, and station address are selectable via DIP switches

• Electrical Isolation:​ Provides noise immunity for reliable communication

• Compact Design:​ Does not increase the external footprint of the controller

Applications

• Connecting a UT35A temperature or process controller to a PLC or DCS system

• Centralized data logging and monitoring of multiple UT35A controllers

• Remote configuration and setpoint changes from a SCADA system

• Integration into small to medium automation systems using Modbus RTU

Important Notes

1. Compatible only with the Yokogawa UT35A series indicating controllers

2. Requires configuration of DIP switches inside the module for address and communication parameters

3. The UT35A controller operates as a Modbus Slave device only

4. Proper termination and wiring practices for RS-485 networks must be followed

5. The module must be installed by a qualified technician, requiring opening of the controller case

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL and EMERSON to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

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We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.