ABB AI950N Analog Input Module for Non-Hazardous Areas
The ABB AI950N analog input module delivers accurate temperature measurement for safe area installations. This S900 series unit works perfectly in control rooms and standard industrial environments. It connects directly to field devices without complex wiring. Many engineers choose this AI950N because it reduces marshalling costs. Additionally, the module supports both RTD and thermocouple sensors.
Key Technical Specifications of AI950N
This ABB AI950N 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 signal interference. HART communication passes through the module. Therefore, you can use existing HART instruments without extra hardware.
Mechanical and Environmental Ratings
The AI950N measures only 20 mm wide, 104 mm deep, and 104 mm high. It weighs just 0.13 kg. This compact size saves valuable cabinet space. The module operates between -20°C and +60°C. Relative humidity tolerance reaches 93% at 40°C. Moreover, it carries CE, RoHS, and WEEE certifications.
All components receive G3 coating per ISA-S71.04. This protects against corrosive atmospheres. The unit is designed for non-hazardous (safe) areas only. Consequently, it works well in chemical plants, power generation, and manufacturing facilities.
Frequently Asked Questions (FAQ)
1. Can I use the ABB AI950N with existing Pt100 sensors?
Yes. The AI950N 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?
Absolutely. The ABB AI950N includes hot swap functionality. You can replace it during operation without powering down the system.
3. What is the difference between AI950N and AI950B?
The AI950N is designed for non-hazardous (safe) areas. The AI950B is certified for Zone 2 hazardous locations. Both share the same electrical specifications.
4. Is the AI950N compatible with PROFIBUS DP networks?
Yes. The S900 system communicates via PROFIBUS DP to the control level. The ABB AI950N 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.
