The ABB AI950B analog input module delivers reliable temperature measurement in hazardous areas. This S900 series unit works perfectly for Zone 2 installations. It connects directly to field devices without complex wiring. Many engineers choose this AI950B because it reduces installation costs. Additionally, the module supports both RTD and thermocouple sensors.
This ABB AI950B includes four isolated input channels. Each channel supports Pt100, Pt1000, and Ni100 in 2-, 3-, or 4-wire technology. For thermocouples, it handles types B, E, J, K, L, N, R, S, T, U, and raw mV signals. The module provides both internal and external cold junction compensation.
Furthermore, it features short circuit and wire break detection. Electrical isolation exists between input/bus and input/power. Channel-to-channel isolation prevents crosstalk. HART communication passes through the module. Therefore, you can use existing HART instruments without extra hardware.
The AI950B measures only 20 mm wide, 104 mm deep, and 104 mm high. It weighs just 0.135 kg. This compact size saves space in your cabinet. The module operates between -20°C and +60°C. Relative humidity tolerance reaches 93% at 40°C. Moreover, it carries ATEX Zone 2 certification for hazardous locations.
All components receive G3 coating per ISA-S71.04. This protects against corrosive atmospheres. The unit also meets CE, RoHS, and WEEE standards. Consequently, it works in chemical plants, oil refineries, and offshore platforms.
You can install the ABB AI950B directly in Zone 2 hazardous areas. The S900 system mounts on a DIN rail. Integrated disconnection mechanisms allow module replacement during operation. This means no need to shut down primary voltage. Hot swap functionality lets you exchange the AI950B while the system runs.
For wiring, use shielded cables for thermocouple inputs. Connect RTDs in 2-, 3-, or 4-wire configurations. The module auto-detects sensor types. Ensure you follow the terminal assignment diagram from the user manual. Then tighten each screw terminal to 0.5 Nm maximum.
Extended diagnostics help you find faults quickly. The AI950B supports FDT/DTM for excellent configuration and monitoring. Auto-diagnostics simplify routine maintenance. Redundant power and communication options increase system availability. Besides that, hot configuration in run allows parameter changes without stopping production.
Each channel independently indicates status via LEDs. You can see open circuit, short circuit, or normal operation at a glance. This reduces troubleshooting time significantly.
ABB AI950B analog input module (1 unit)
S900 base plate (pre-assembled)
Terminal block for field wiring
Module labeling sticker
Quick start guide (printed)
Note: No certificates or warranty documents are included in this package.
Shipping: FedEx, UPS, DHL
1. Can I use the ABB AI950B with existing Pt100 sensors?
Yes. The AI950B supports Pt100, Pt1000, and Ni100 in 2-, 3-, or 4-wire technology. It works with most standard RTD sensors.
2. Does this module support hot swapping in Zone 2?
Absolutely. The ABB AI950B includes hot swap functionality. You can replace it during operation without powering down the system.
3. What is the maximum cable length for thermocouple inputs?
We recommend keeping thermocouple cables under 200 meters. Use shielded twisted-pair cables to minimize noise interference.
4. Is the AI950B compatible with PROFIBUS DP networks?
Yes. The S900 system communicates via PROFIBUS DP to the control level. The ABB AI950B works seamlessly within this architecture.
5. How do I check if a channel has a wire break?
The module provides short and break detection for each channel. An LED indicator and diagnostic message will alert you immediately.
| Brand Name | ABB |
| Model No. | AI950B |
| Product Type | Analog Input Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
