Description
Overview
The ABB NTDI02 Digital I/O Termination Unit is a field interface module developed for Harmony Rack I/O architectures used within ABB Symphony and Bailey INFI 90 distributed control systems. The unit is designed to provide reliable digital signal termination and structured connectivity between field devices and process control I/O modules.
The NTDI02 serves as a centralized termination platform for digital input, digital output, pulse input, and frequency counting applications. Its compact construction and standardized field wiring layout simplify system integration, cabinet organization, and long-term maintenance in industrial automation environments.
Key Features
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Supports digital signal termination for Harmony Rack I/O systems
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Interfaces with multiple ABB digital and analog I/O modules
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Handles up to 16 field input signals
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Compatible with Symphony Enterprise Management and Control platforms
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Designed for Bailey Net 90 and INFI 90 systems
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Provides organized field wiring termination
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Supports pulse monitoring and frequency counting applications
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Compact rack-compatible form factor
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Suitable for system modernization and replacement projects
Technical Specifications
| Parameter |
Specification |
| Brand |
ABB |
| Model |
NTDI02 |
| Product Type |
Digital I/O Termination Unit |
| Product Series |
Harmony Rack I/O |
| Compatible Systems |
Bailey Net 90, INFI 90, Symphony Enterprise |
| Function |
Digital signal termination and field interface |
| Maximum Input Capacity |
16 Digital Signals |
| Supported I/O Types |
Digital Input, Digital Output, Pulse Input |
| Installation Type |
Rack I/O System Integration |
| Field Wiring Method |
Terminal-Based Connection |
| Controller Communication |
Rack Interface Architecture |
| Compatible Input Modules |
IMDSI13, IMDSI14, IMDSI22 |
| Compatible Output Modules |
IMDSO14, IMDSO15, IMASO11 |
| Additional Compatible Modules |
IMDSM04, IMFCS01 |
| System Role |
Field Device to Controller Interface |
| Product Status |
Active |
| Condition |
Brand New |
| Country of Origin |
Sweden |
| HS Code |
8537101190 |
| Dimensions |
18 × 17.6 × 2.2 cm |
| Weight |
0.36 kg |
Functional Characteristics
The ABB NTDI02 operates as an interface termination assembly linking field instrumentation with Harmony control modules. It routes digital process signals through the rack I/O infrastructure while maintaining signal stability and organized cabinet wiring.
Compared with older termination assemblies, the NTDI02 offers broader module compatibility for upgraded ABB system configurations while preserving integration with legacy control architectures.
Application Areas
The NTDI02 termination unit is commonly installed in:
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Distributed control systems
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Process automation plants
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Power generation facilities
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Petrochemical processing systems
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Industrial manufacturing lines
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Water treatment operations
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Legacy ABB Harmony migration projects
FAQ
What is the primary function of the NTDI02?
The NTDI02 is used to terminate and route digital field signals between process devices and ABB Harmony or INFI 90 control modules.
How many signals can the NTDI02 support?
The unit supports up to 16 digital field input channels.
Is the NTDI02 compatible with older ABB systems?
Yes. The module is compatible with Bailey Net 90 and INFI 90 system architectures while also supporting Harmony-based configurations.
Can the NTDI02 replace the NTDI01?
The NTDI02 is commonly used as a functional alternative in systems requiring compatibility with updated ABB module arrangements.
