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- Honeywell
- 8C-TCNTA1-C
- Controller I/O Termination Assembly
- USA
- 110 × 30 × 120 mm
- 0.45kg
- Xiamen, China
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1. Product Overview – Honeywell 8C-TCNTA1-C
The 8C-TCNTA1-C is an I/O Termination Assembly (IOTA) module from the Series 8 platform designed for use with Honeywell’s C300 distributed control system (DCS). It serves as a connection interface between field devices (such as sensors and actuators) and the I/O modules (IOMs) of the control system.
The “C” suffix indicates the module is coated with a conformal protective layer, making it suitable for harsh industrial environments prone to moisture, dust, and corrosive gases. This coating improves long-term reliability and robustness in critical control applications.
Though passive in function (i.e., it does not perform processing), the 8C-TCNTA1-C plays a key role in organizing, isolating, and protecting I/O wiring between the field and the control system.
2. Brand and Series Information
3. Technical Specifications
| Specification | Details |
|---|---|
| Model | 8C-TCNTA1-C |
| Module Type | I/O Termination Assembly (IOTA) |
| Supported I/O Points | Up to 32 digital or analog channels |
| Signal Types | Analog / Digital |
| Input Voltage | Typically 24 VDC (from system backplane) |
| Wiring Method | Screw terminals or plug-in (varies by configuration) |
| Coating | Yes (Conformal coating for corrosion protection) |
| Redundancy Support | Works in redundant configurations with appropriate IOMs |
| Isolation | Signal isolation provided between field and system |
| Operating Temperature | –40°C to +85°C |
| Storage Temperature | –40°C to +85°C |
| Humidity | 0–95% RH, non-condensing |
| Vibration Resistance | 5 g RMS (10–500 Hz) |
| Shock Resistance | 15 g (20 ms half-sine) |
| Dimensions | Approx. 110 × 30 × 120 mm (or 127 × 89 × 25 mm in some variants) |
| Weight | Approx. 0.25 – 0.45 kg |
📌 Note: The actual size and weight may vary slightly depending on installation or external housing.
4. Product Applications
The 8C-TCNTA1-C is widely used in the following industries and environments:
-
Distributed Control Systems (DCS):
Key component in Honeywell C300 systems, connecting field I/O to the controller. -
Chemical & Petrochemical Plants:
Connects process instruments such as transmitters and valves in harsh environments. -
Power Generation:
Used in thermal, hydro, or renewable energy plants for critical I/O signal interfacing. -
Water & Wastewater Treatment:
Ensures organized, reliable field signal termination and protection. -
Metals & Mining Industries:
Connects sensors and actuators in high-vibration and dusty environments. -
Manufacturing Automation:
Allows streamlined field wiring for process lines and assembly systems. -
Redundant Safety Systems:
Supports systems requiring high availability and fault tolerance.
5. Product Advantages
-
Environmental Protection:
Conformal coating safeguards against dust, humidity, and chemical vapors. -
Modular Design:
Easy to install, replace, and maintain with minimal downtime. -
Thermal Optimization:
Enhanced heat dissipation as part of Series 8 architecture. -
High Compatibility:
Fully compatible with Honeywell IOMs, backplanes, and C300 controllers. -
Redundancy Support:
Can be deployed in dual I/O and redundant controller architectures. -
Signal Isolation:
Prevents fault propagation and enhances system safety. -
Clean Wiring Layout:
Centralized terminal organization improves cabinet layout and maintenance. -
Field Reliability:
Withstands harsh industrial conditions with robust construction.
6. Recommended Models
6.1 Related Models (Same Series or Function)
| Model | Description | Key Specs | Remarks |
|---|---|---|---|
| 8C-TCNTA2 | IOTA with extended capacity | Supports more I/O points | Higher density wiring |
| 8C-TCNTA3 | IOTA with redundancy support | Redundant channel configuration | For high-availability systems |
| 8C-TCNTA4 | Enhanced environmental protection | Ruggedized for extreme sites | Industrial-grade |
| 8C-TCNTA5 | Standard IOTA (non-coated) | Similar to TCNTA1 without coating | Budget applications |
| 8C-TCNTA6 | High-density IOTA module | Supports 48+ I/O channels | For dense signal systems |
6.2 Other Popular Honeywell Models
| Model | Category | Key Specs | Use Case |
|---|---|---|---|
| 8C-PCNT03 | Controller Module | Series 8 Process Controller | Pairs with C300 system |
| 8C-PCNT05 | High-Performance Controller | Faster CPU & extended memory | Advanced automation |
| 8U-TCNTA1 | Non-coated IOTA | Similar to 8C-TCNTA1 without protection | Cleaner environments |
| 7C-PCNT1 | Legacy Controller | Used in older DCS setups | System upgrades |
| 9C-PCNT01 | Next-gen Controller | High-speed processing | Future-ready systems |
7. Frequently Asked Questions (FAQ)
Q1: What is the main purpose of the 8C-TCNTA1-C module?
A1: It serves as a termination unit that connects field instruments to the control system, allowing clean, isolated signal routing to the I/O modules.
Q2: Does this module perform any signal processing?
A2: No, it is a passive device with no signal conditioning or logic processing.
Q3: Why choose the “-C” coated version?
A3: The coating protects the module against humidity, corrosive gases, and dust, extending service life in harsh environments.
Q4: How many I/O channels does it support?
A4: Typically up to 32 channels, depending on system configuration.
Q5: What is the operating temperature range?
A5: The module can operate between –40°C and +85°C.
Q6: Can it be used in a redundant control setup?
A6: Yes, it supports redundant I/O configurations when paired with compatible modules.
Q7: Will a failure in one channel affect others?
A7: No, each channel is typically isolated to prevent cascading failures.
Q8: Is it compatible with systems other than C300?
A8: It is optimized for Honeywell C300 systems; using it with other systems is not recommended.
Q9: Is the module hot-swappable?
A9: Not typically. It should be replaced during planned maintenance to avoid signal loss.
Q10: What factors should I consider when selecting this module?
A10: Evaluate your I/O count, environmental conditions, redundancy needs, and compatibility with your control architecture.
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