Product Overview
The ABB 07 AC 91 is an analog input/output module designed for use as a remote module on the CS31 system bus. This terminal block module provides 16 configurable analog channels, supporting both voltage and current signals with selectable resolution. It is ideal for applications requiring flexible signal conditioning and remote I/O capabilities in industrial automation systems.
Technical Specifications
The ABB 07 AC 91 operates with a rated supply voltage of 24 V DC and has a maximum current consumption of 0.2 A. Its maximum power dissipation is 5 W. The module offers 8 or 16 analog input channels and 8 or 16 analog output channels, depending on the selected operating mode. Conversion error is typically 0.5% (max 1%). The module uses removable screw-type terminal blocks for wiring and mounts on a DIN rail. Dimensions are 120 x 140 x 85 mm, weight 450 g.
Industry Applications
The ABB 07 AC 91 is well-suited for process control, manufacturing automation, and building management systems. In a typical setup, it connects to sensors and actuators via the CS31 bus, enabling remote monitoring and control. Its configurable input ranges (±10 V, 0…10 V, 0…20 mA) make it compatible with a wide variety of industrial transmitters and PLC systems.
Installation & Setup Guidance
Mount the ABB 07 AC 91 on a DIN rail according to DIN EN 50022-35 (15 mm deep). Use the included terminal blocks for wiring: supply and CS31 bus terminals accept up to 1 x 2.5 mm² or 2 x 1.5 mm²; other terminals accept up to 1 x 1.5 mm². Set the operating mode and channel configuration using the DIL switches located under the cover on the right side of the housing. Ensure the enabling input (binary 1 signal at terminals 25 and 26) is active for analog outputs to function.
Maintenance & Reliability
The ABB 07 AC 91 features protection against reversed polarity and includes self-protecting current inputs that automatically reset after an overcurrent condition. Regular inspection of terminal connections and LED diagnostics (17 LEDs total) helps maintain reliable operation. The module operates within a temperature range of 0 to 55 °C, and natural convection cooling should not be obstructed.
Compatibility & Integration
The ABB 07 AC 91 communicates via the CS31 system bus using the EIA RS-485 interface standard. It is electrically isolated from the rest of the module. The module uses up to eight input words and eight output words on the CS31 bus. In 8-bit mode, two analog values are packed into one word. It is compatible with ABB Advant Controller 31 systems.
Selection Guide & Purchasing Advice
Before purchasing the ABB 07 AC 91, verify your system’s bus protocol and power supply requirements. The module requires 24 V DC and a CS31 bus connection. Included in the scope of delivery are the module itself plus terminal blocks (1x 2-pole, 1x 3-pole, 1x 5-pole, 4x 8-pole). For reliable supply, choose PLC Source PRO. We stock genuine ABB spares and can assist with compatibility questions.