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- ABB Bailey
- NTAI05
- Analog Input Terminal Unit
- Sweden (SE)
- 78.74 x 215.9 x 233.68 mm 0.54 kg
- 0.54 kg
- Xiamen, China
- New & In Stock
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Product Overview
The ABB Bailey NTAI05 Analog Input Terminal Unit is a field termination module used in ABB Bailey INFI 90 / Net 90 Distributed Control Systems (DCS). It provides a structured interface for connecting multiple analog input signals from field instruments such as transmitters, sensors, and industrial measurement devices.
It functions as the front-end wiring termination layer between field devices and analog input modules, ensuring stable and organized signal routing into the control system.
Technical Specifications
| Item | Details |
|---|---|
| Manufacturer | ABB (Bailey) |
| Model | NTAI05 |
| Product Type | Analog Input Terminal Unit |
| System Compatibility | INFI 90 / Net 90 DCS |
| Function | Analog signal termination and routing |
| Dimensions | 78.74 × 215.9 × 233.68 mm |
| Weight | 0.54 kg |
| Input Channels | Multi-channel analog inputs (system dependent) |
| Signal Types | 4–20 mA, voltage, RTD, thermocouple (depending on system configuration) |
| Installation Type | Control cabinet / termination assembly |
Function Description
The NTAI05 is used to terminate and organize analog field wiring signals before they are processed by the DCS system.
Its main functions include:
- Providing termination points for analog input signals
- Supporting multiple field instrument connections
- Routing signals to analog input slave modules
- Organizing complex field wiring inside control cabinets
- Improving maintenance and troubleshooting efficiency
It does not perform signal conversion or processing; it serves strictly as a termination interface unit.
Working Principle
The module operates within the analog input signal chain:
- Field instruments generate analog signals (such as process measurements)
- Signals are wired into the NTAI05 terminal points
- The unit routes signals to analog input slave modules
- Slave modules perform signal conditioning and analog-to-digital conversion
- Controller modules use processed data for monitoring and control
This ensures reliable and structured signal handling across the system.
System Role
Within ABB Bailey DCS architecture, the NTAI05 performs:
- Analog signal termination
- Field wiring organization
- Signal routing to I/O modules
- Support for multi-channel analog acquisition
- Front-end interface for process instrumentation
It is part of the input interface layer of the control system.
Industrial Applications
The ABB NTAI05 is used in:
- Power generation plants
- Oil and gas facilities
- Petrochemical industries
- Water treatment systems
- Industrial automation systems
- Process monitoring and control systems
- ABB Bailey INFI 90 / Net 90 installations
Installation and Integration
- Installed in control cabinets or termination racks
- Connected directly to field instrumentation wiring
- Interfaces with analog input slave modules (e.g., IMASI/IMASM series)
- Requires proper grounding and shielding practices
- Installed by qualified instrumentation engineers
- Integrated into system I/O architecture
Compatible System Components
- ABB Bailey IMASI / IMASM analog input modules
- ABB Bailey NMFC / NMFP controller modules
- ABB Bailey NLIM loop interface modules
- ABB Bailey NPTM point table modules
- ABB Bailey NRDI / NRAI termination modules
- INFI 90 / Net 90 system backplane architecture
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| NTAI05 | Analog input terminal unit | Multi-channel termination | Field signal interface |
| NTAI04 | Analog input terminal unit | Similar structure | Standard analog I/O |
| IMASI05 | Analog input slave module | Signal conversion & processing | Control system input layer |
| NIAI05 | Analog input module | Direct data acquisition | DCS processing layer |
| NTDI05 | Digital input terminal unit | Digital signal termination | On/off field signals |
Key Advantages
- Structured multi-channel analog wiring
- Improves signal reliability and stability
- Reduces control cabinet wiring complexity
- Strong compatibility with ABB Bailey systems
- Suitable for large-scale industrial processes
- Supports long-term operation in harsh environments
- Simplifies maintenance and fault diagnosis
Technical FAQs
Q1: What is the main function of NTAI05?
It provides termination and routing for analog input signals from field devices.
Q2: Does it process or convert signals?
No. Signal conversion is performed by analog input modules, not the terminal unit.
Q3: What systems use it?
It is used in ABB Bailey INFI 90 and Net 90 distributed control systems.
Q4: Why is it important?
Because it ensures organized and reliable analog signal connections into the control system.
Conclusion
The ABB Bailey NTAI05 Analog Input Terminal Unit is a key interface component in ABB Bailey distributed control systems. It provides structured termination and routing for multiple analog signals, ensuring stable and reliable data transmission to system I/O modules.
It is widely used in industrial environments such as power plants, petrochemical facilities, and process automation systems where accurate analog signal acquisition is essential for safe and efficient operation.