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Product Overview
The ABB Bailey ITCTU11 (Part No. 18231151 B) is a field signal termination unit designed for the INFI 90 Distributed Control System (DCS) used in process control environments. It provides an organized, secure interface between field devices (like transmitters, sensors, actuators) and I/O modules within ABB’s Bailey control architecture.
This passive termination unit plays a vital role in structured cable management, signal routing, and safe field connection. With its screw-type terminals and standardized layout, it enhances reliability, simplifies maintenance, and ensures long-term operational consistency in harsh industrial applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | ITCTU11 |
| Part Number | 18231151 B |
| Product Type | Termination Unit (TU) |
| Manufacturer | ABB (Bailey Controls) |
| System Compatibility | INFI 90 DCS, Symphony D / Harmony Series |
| Supported Modules | IMASI, IMDSI, IMASO, IMDSO, and related Bailey I/O cards |
| Connection Type | Screw-type field terminals, ribbon cable to controller side |
| Signal Support | Analog & Discrete I/O signal termination |
| Terminal Capacity | 32 channels |
| Power Requirement | None (passive component) |
| Mounting | Panel mount / DIN rail compatible |
| Housing Material | Flame-retardant polycarbonate plastic |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Tolerance | 5%–95% RH (non-condensing) |
| Protection Rating | IP20 |
| Dimensions (L×W×H) | 280 × 110 × 40 mm |
| Weight | 0.52 kg |
| Certifications | CE, RoHS, UL Recognized |
Product Applications
The ABB ITCTU11 Termination Unit is designed for use in a wide range of industrial process control applications:
-
Thermal Power Plants
Interfaces between turbine control instrumentation and I/O modules. -
Oil & Gas Refineries
Supports safe and organized termination of hazardous-area field signals. -
Chemical Processing Facilities
Manages analog inputs from temperature, pressure, and flow transmitters. -
Water & Wastewater Systems
Facilitates pump and valve control wiring within DCS architectures. -
Metals & Mining Operations
Enables structured field wiring in smelters, crushers, and control rooms. -
Pulp & Paper Industry
Integrates distributed process measurements and feedback loops efficiently.
Product Advantages
-
Clean and Organized Field Connection
Clear terminal labeling and screw design allow error-free installation and maintenance. -
Flexible Mounting
Can be easily installed on DIN rails or flat-mounted inside enclosures. -
Passive, Reliable Hardware
No power requirement means lower failure risk and increased uptime. -
System Compatibility
Engineered specifically for Bailey INFI 90 and Symphony systems, ensuring flawless integration. -
Durable Industrial Construction
Flame-retardant and vibration-resistant for use in high-demand environments. -
Reduces Wiring Complexity
Acts as a centralized termination hub, making cable management more efficient and error-resistant.
Frequently Asked Questions (FAQ)
-
What is the ABB ITCTU11 used for?
It’s a field signal termination unit for organizing and connecting I/O signals in Bailey DCS systems. -
Does this termination unit need a power supply?
No, it is a passive device and requires no power source. -
How many channels does the ITCTU11 support?
It supports 32 field signal channels. -
Is it compatible with current ABB systems?
It is designed for ABB Bailey legacy systems (INFI 90, Symphony), but can be integrated into hybrid setups. -
What type of signals does it handle?
It supports both analog and discrete I/O signals. -
Can it be used with IMASI and IMDSO modules?
Yes, it is fully compatible with those and other related modules. -
Is this termination unit DIN-rail mountable?
Yes, it can be mounted on DIN rails or directly to panels. -
What type of field wiring connections are used?
Screw-type terminals are used for secure and durable connections. -
Does it offer any surge or overvoltage protection?
No, it is a basic termination unit and relies on system-level protections. -
What maintenance does it require?
Occasional inspection for loose terminals or wiring wear—otherwise maintenance-free.
Related or Similar Models (Same Series / Function)
| Model Number | Description | Key Features |
|---|---|---|
| ITCTU01 | Termination Unit | 16-channel version, legacy compatibility |
| ITCTU03 | Compact Termination Unit | Ideal for smaller control panels |
| ITCTU04 | Standard Termination Unit | Popular for general-purpose DCS use |
| ITCTU13 | Extended I/O Termination Unit | Higher density field signal support |
| IMASI23 | Analog Input Module | Works directly with ITCTU11 |
| IMDSO14 | Digital Output Module | Compatible with ITCTU series |
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