Product Overview
The ABB AI931S Industrial Automation Module (article number 3KDE175511L9310) is a 4-channel analog input module designed for the S900 I/O system. This ABB AI931S module accepts passive 0/4...20 mA signals and provides intrinsic safety for field devices installed in hazardous areas. With ATEX Zone 1 certification, the AI931S allows direct installation in explosive atmospheres, eliminating the need for separate marshalling cabinets and significantly reducing wiring costs.
Part of the S900 I/O type S family, the ABB AI931S communicates via PROFIBUS DP, enabling seamless integration into existing control systems. Its rugged construction and hot-swap capability ensure minimal downtime during maintenance, making it a reliable choice for continuous process operations.
Key Features & Benefits
- ATEX certification for Zone 1 hazardous locations
- 4 channels for 0/4...20 mA passive inputs
- HART protocol support for smart device communication
- Hot swap functionality – replace modules without interrupting power
- Hot configuration in run – adjust parameters on the fly
- Extended diagnostics and auto-diagnostics for simplified maintenance
- Electrical isolation between input/bus and input/power
- Short and break detection for reliable signal monitoring
- G3 coating for corrosion resistance in harsh environments
- Common return for all inputs
Technical Specifications
| Specification |
Value |
| Article Number |
3KDE175511L9310 |
| Type |
Analog Input |
| Number of Channels |
4 |
| Signal Type |
4...20 mA (passive) |
| HART |
Yes |
| Intrinsic Safety |
Yes |
| Redundancy |
No |
| Mechanics |
S900 |
| CE Mark |
Yes |
| Hazardous Location |
ATEX Zone 1 |
| Corrosive Atmosphere |
ISA-S71.04 G3 |
| Relative Humidity |
Max. 93 % +/- 3 % at 40°C |
| Max Ambient Temperature |
-20 °C...60 °C |
| RoHS Compliance |
DIRECTIVE/2011/65/EU (EN 50581:2012) |
| WEEE Compliance |
DIRECTIVE/2012/19/EU |
| WEEE Category |
Small Equipment (No External Dimension More Than 50 cm) |
| Width |
20 mm (0.79 in.) |
| Depth |
104 mm (4.09 in.) |
| Height |
104 mm (4.09 in.) |
| Weight |
0.13 kg (0.28 lbs.) |
Industry Applications
The ABB AI931S is ideal for process industries where hazardous area classification is critical. Typical applications include:
-
Oil & Gas: Monitoring pressure and flow transmitters in Zone 1 areas.
-
Chemical Processing: Connecting intrinsically safe sensors for temperature and level measurement.
-
Pharmaceutical Manufacturing: Ensuring safe operation in potentially explosive atmospheres.
Because the AI931S supports HART, it enables remote calibration and diagnostics of smart transmitters, reducing manual intervention and improving overall plant efficiency.
Installation & Setup Guidance
Mount the AI931S on a standard S900 I/O rail. Ensure that the module is correctly oriented and that the bus connector is securely engaged. For hazardous area installations, verify that the enclosure meets the required IP rating and that all cable glands are properly sealed. Connect passive field devices to the input terminals, observing the specified polarity. Use the PROFIBUS DP interface for communication with the control system. The module supports hot swap, so you can replace it without powering down the system.
Maintenance & Reliability
Routine inspection of the AI931S should focus on:
- Checking for physical damage or corrosion on the terminals.
- Verifying that the ambient temperature remains within the -20 °C to 60 °C range.
- Ensuring that relative humidity does not exceed 93 % at 40 °C.
- Cleaning dust accumulation from the module surface using a dry, anti-static cloth.
The module's auto-diagnostics and extended diagnostics simplify troubleshooting, helping to minimize unplanned downtime and reduce maintenance costs over the long term.
Compatibility & Integration
The ABB AI931S is designed for the S900 I/O system and communicates via PROFIBUS DP. It is compatible with ABB control systems that support PROFIBUS DP, as well as third-party systems using the same protocol. The module can be installed in non-hazardous areas or directly in Zone 1/Zone 2 hazardous areas, depending on the system variant. Its intrinsic safety features allow connection to field devices located in Zone 0, Zone 1, or Zone 2.
Selection Guide & Purchasing Advice
Before purchasing the ABB AI931S, verify that your control system supports PROFIBUS DP and that the S900 I/O infrastructure is in place. Confirm the required number of channels and signal types (0/4...20 mA). If you need redundancy, note that this module does not support redundancy; consider alternative models if that is a requirement. For a reliable supply and competitive pricing, PLC Source PRO offers the ABB AI931S with full technical support and fast delivery.