ABB Bailey NRAI01 L700783C1 Analog Input Termination Assembly

The ABB Bailey NRAI01 L700783C1 is an Analog Input Termination Assembly designed for use within the Bailey INFI 90 Distributed Control System (DCS). This module serves as the critical interface point between analog field devices and the control system’s input modules, ensuring accurate signal transmission, proper termination, and electrical noise reduction.

The NRAI01 plays a vital role in maintaining signal integrity for analog inputs, including current and voltage signals. It features high reliability and ruggedness suited for industrial environments, delivering stable performance to support precise process monitoring and control.

Its robust design and compatibility with Bailey’s legacy and current control systems make it a trusted component in critical process automation industries worldwide.

Product Specifications

Applications

The NRAI01 Analog Input Termination Assembly is widely used in diverse industrial sectors requiring precise analog signal acquisition and stable input termination. Typical applications include:

• Oil & Gas Refining and Processing

• Power Generation Plants (Thermal, Hydro, Nuclear)

• Petrochemical Manufacturing

• Water and Wastewater Treatment Facilities

• Pharmaceutical and Chemical Production

• Pulp and Paper Industry

• Food and Beverage Processing Plants

• Metals and Mining Operations

In all these environments, the NRAI01 ensures clean and accurate analog signal delivery to the control system, minimizing signal degradation and interference.

Advantages

• High Signal Integrity: Proper termination and isolation ensure accurate analog signal transmission with minimal noise interference.

• Robust Build Quality: Designed to withstand industrial environmental stresses such as temperature fluctuations and humidity.

• Legacy System Compatibility: Seamlessly integrates with Bailey INFI 90 systems and supports long-term plant automation projects.

• Easy Installation and Maintenance: Screw terminal design simplifies wiring and servicing.

• Compact Size: Space-efficient design for installation in crowded control cabinets.

• Electromagnetic Compatibility: Complies with strict EMC standards for industrial use.

• Wide Operating Range: Supports various analog input types, including voltage, current, and thermocouples.

Frequently Asked Questions (FAQ)

1. What is the primary function of the NRAI01 module?

   It acts as an analog input termination assembly to ensure clean, stable connections between field sensors and the control system.

2. Which types of analog signals does the NRAI01 support?

   It supports standard current signals (4-20 mA), voltage signals (0-10 V), and, in some variants, thermocouple inputs.

3. Is the NRAI01 compatible with other ABB DCS systems outside INFI 90?

   It is primarily designed for INFI 90 but may be adaptable with other ABB legacy systems with proper interfacing.

4. What environmental conditions can it withstand?

   The module operates reliably between 0°C and +60°C and can be stored between -40°C and +85°C, with high humidity tolerance.

5. Does the NRAI01 provide electrical isolation?

   Yes, it provides galvanic isolation to prevent noise and interference between input channels and the control system.

6. How many channels does one NRAI01 assembly support?

   Typically, it supports 16 analog input channels per assembly.

7. What is the physical size and weight of the NRAI01?

   The unit measures 125 × 140 × 35 mm, and weighs 0.82 kg.

8. Can the NRAI01 be serviced while the system is running?

   For safety and signal integrity, servicing is recommended during scheduled maintenance or system downtime.

9. What kind of wiring connection does it use?

   Screw terminals are used for secure and reliable wiring connections.

10. How does the NRAI01 improve system reliability?

    By reducing signal noise, providing proper terminations, and ensuring stable connections, it enhances overall system performance and reduces errors.