Description
The ABB GJR5252300R3101 07AC91 is an Analog Input/Output Module designed for the ABB Advant Controller 31 (AC31) PLC system. It functions as a remote I/O module connected through the CS31 system bus, providing flexible analog signal acquisition and output control for industrial automation applications.
The 07AC91 module provides 16 configurable analog channels and supports multiple operating modes, including 8 analog inputs plus 8 analog outputs with 12-bit resolution, or 16 configurable analog channels in 8-bit mode. It is suitable for processing industrial voltage and current signals such as ±10 V and 0…20 mA in distributed control systems.
This module is commonly used in ABB AC31 automation systems for applications requiring remote analog measurement, actuator control, process monitoring, and machine automation. The GJR5252300R3101 version is equivalent to the standard 07AC91 module with KBA labeling.

ABB GJR5252300R3101 07AC91H AC31
Product Specifications
| Specification | Details |
|---|---|
| Brand | ABB |
| Model | GJR5252300R3101 |
| Series | Advant Controller 31 (AC31) |
| Product Name | 07AC91 Analog Input/Output Module |
| Module Type | Remote Analog I/O Module |
| Communication Interface | CS31 System Bus (RS-485) |
| Analog Channels | 16 Configurable Analog I/O Channels |
| Analog Input Mode | 8 AI, ±10 V / 0…20 mA, 12-bit resolution |
| Analog Output Mode | 8 AO, ±10 V / 0…20 mA, 12-bit resolution |
| Alternative Mode | 16 Analog Channels, Configurable in Pairs, 8-bit Resolution |
| Power Supply | 24 VDC |
| Mounting Type | DIN Rail Mounting |
| Terminal Type | Removable Screw Terminal Blocks |
| Place of Manufacture / Origin | Germany |
| Product Status | New Surplus / Tested PLC Spare Part |
| Dimensions | Approx. 120 × 140 × 85 mm |
| Weight | Approx. 0.45–0.8 kg |
| Country of Origin | Germany |
| Discontinued | Yes (AC31 series replaced by newer ABB AC500 platform) |
Key Features
⚙️ Flexible Analog Signal Processing
Supports industrial analog voltage and current signals for measurement and control applications.
⚙️ CS31 Remote I/O Communication
Connects to ABB AC31 controllers through the CS31 serial bus for distributed automation architectures.
⚙️ Configurable Channel Operation
Channels can be configured according to application requirements using hardware settings.
⚙️ Industrial Automation Compatibility
Designed for process control, factory automation, machine control, and legacy ABB PLC systems.
⚙️ Replacement & Maintenance Use
Ideal for maintaining existing ABB Advant Controller 31 installations where original AC31 modules are still required.
Typical Applications
• Industrial process automation
• Distributed PLC control systems
• Analog sensor monitoring
• Valve and actuator control
• Machine automation equipment
• Power and utility control systems
• Legacy ABB AC31 PLC installations
Frequently Asked Questions
❓ Q: What is the function of ABB GJR5252300R3101 07AC91?
A: It is an analog input/output expansion module used with ABB AC31 PLC systems for collecting analog signals and controlling analog outputs.
❓ Q: Which PLC system does the 07AC91 support?
A: The module is designed for ABB Advant Controller 31 (AC31) systems using the CS31 bus communication interface.
❓ Q: How many analog channels does this module have?
A: It provides 16 configurable analog channels, supporting 8 AI + 8 AO operation or 16-channel configurable operation depending on configuration.
❓ Q: What power supply does the module require?
A: The 07AC91 operates with a 24 VDC supply.
❓ Q: Can it replace other ABB 07AC91 modules?
A: Compatibility should be checked according to the exact AC31 system configuration, wiring, and application requirements.
❓ Q: Is this module still manufactured by ABB?
A: The AC31 product family is a legacy ABB platform and has been replaced by newer ABB PLC platforms such as AC500.
Recommended ABB Related Models
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Analog input module used in ABB industrial automation systems.



