ABB AI931S

Operating Parameters

Input Signal Types:4-20 mA,0-20 mA,0-10 V

Operating Temperature:-25°C to +70°C

Accuracy: The module offers high accuracy ±0.1%

Input Channels:four input channels, each capable of processing 0/4–20 mA signals.

Signal Processing: Each channel is equipped with a 16-bit analog-to-digital converter.

Power Supply: The module provides power to 4–20 mA loop-powered 2-wire transmitters.

Product Features

Digitizing Input Signal: The ABB AI931S digitizes the input analog signals at 0/4 - 20 mA into readable digital values for control systems including Programmable Logic Controllers or Distributed Control Systems.

Short and Break Detection:Supports short and break detection functions. Thus it quickly detects any segment of the input signal lines that are short and broken. It ensures early detection of such issues to avoid any breakdowns in systems and timely maintenance for minimum downtime.

HART Communication: Enables communication of HART frames over fieldbus. HART communication enables bi-directional communication between ABB AI931S and HART enabled field devices. This allows the module to receive analog signals but also communicate digital data in both directions, including device status, calibration data, and diagnostic messages, enhancing the overall control and monitoring capabilities.

Analog Signal Acquisition : The ABB AI931S module receives analog signals from field-device and converts them into digital format for processing in the control system.

Power for Transmitters: It provides power for 4–20 mA loop-powered 2-wire transmitters, thus simplifying system design and reducing wiring.

Isolation Isolation: The module can electrically isolate the input, bus, and power, further protecting the system, as well as signals.

Installation

Mounting: The module is also easy to install. It can be installed in a standard industrial enclosure, often on a DIN rail.

Wiring to Field devices and control system: The ABB AI931S wiring to both Field devices and control system is simple. The terminals are labeled; facilitate connecting the 0/4 - 20 mA signal wires from sensors or transmitters.

Config: The AI931S must be configured in the control system after the physical installation is completed. As part of this process, you may need to configure parameters such as the input signal range, channel assignments, and communication settings.

Application range

Process Control:Chemical, Petrochemical and Pharmaceutical industries

Energy Management : The process of measuring and managing the energy consumption.

Automotive Safety Systems: Working in safety systems that involve precise analog signal processing in challenging environments.

Manufacturing: Used to monitor process variables like temperature, pressure, flow, and level.

Energy and Utilities: Equipment monitoring and control in power plants and substations.

Oil and Gas: For process control in the oil and gas industry, Production management in Oil field, Safety systems including monitoring of pressure and temperature in pipelines.

Troubleshooting

Signal Related Problems: If signals are false or different from what they should be, check the wiring connections from field devices to ABB AI931S. Make sure wires are connected correctly and not damaged, and that the correct signal range is used.

Communication Issues: If the problem is communication related, inspect the communication cables for damage or loose connection. Check that the baud rate, parity, and address settings of the ABB AI931S and the control system are consistent.

Module specific Faults: If some part of the module seems to be not functioning, check the power supply on the module to make sure it is providing the proper voltage.

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