Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 8C-TCNTA1 |
| Part Number | 51307125-175 |
| Manufacturer | Honeywell |
| Product Type | C300 Controller I/O Termination Assembly (IOTA) |
| System Compatibility | Honeywell Experion PKS Series 8 / C300 Controller |
| Form Factor | 6-inch or 12-inch IOTA (single or redundant configuration) |
| Network Connectivity | Dual 100 Mbps Fault-Tolerant Ethernet (FTE) ports |
| I/O Interface | Dual redundant I/O-Link ports |
| Coating Type | G3-grade conformal coating (ANSI/ISA-S71.04-1985) |
| Power Supply | 24 VDC (±20%, 18–32 VDC) |
| Current Consumption | 150 mA |
| Operating Temperature | -40°C to +70°C (coated variant) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH non-condensing |
| Isolation Voltage | 2500 VDC (channel to system/power) |
| Mounting Type | Vertical mounting in Series 8 I/O rack |
| Weight | Approx. 0.5 kg to 1.0 kg |
| Certifications | CE, UL, CSA, Class I Division 2, Zone 2 |
Main Features and Advantages
Passive Termination Architecture with Integrated Addressing: The HONEYWELL 8C-TCNTA1 is a passive IOTA that contains only passive components, ensuring high reliability and minimal points of failure . It features integrated FTE address switches for manual node configuration, simplifying network setup and maintenance . The HONEYWELL 51307125-175 provides a rugged termination platform with screw-type or spring-clamp terminals for secure field wiring connections .
Redundancy-Ready Design: The 8C-TCNTA1 supports both simplex and redundant C300 controller configurations. For high-availability applications, a second identical controller with its own IOTA can be installed, connected via a dedicated redundancy cable for automatic failover . This capability ensures maximum system uptime for mission-critical process control.
Hot-Swap Support for Minimal Downtime: The HONEYWELL 8C-TCNTA1 enables Module Removal and Insertion Under Power (RIUP), allowing the C300 controller or I/O modules to be replaced without powering down the system or disconnecting field wiring . This feature dramatically reduces maintenance downtime and improves system availability.
G3 Conformal Coating for Harsh Environments: The “8C” prefix on the HONEYWELL 51307125-175 indicates conformal coating, providing essential protection against moisture, corrosive gases, dust, and chemical exposure . This makes the module suitable for deployment in aggressive industrial environments such as petrochemical plants, offshore platforms, and pulp and paper facilities .
Vertical Mounting and Thermal Management: The Series 8 form factor employs an innovative vertical mounting design that optimizes cabinet wiring and heat dissipation . The tilted design and integrated ventilation features allow for higher cabinet density while maintaining effective thermal management .
Application Field
The HONEYWELL 8C-TCNTA1 is deployed across industries requiring reliable distributed control for continuous and batch processes. Its primary application is within the oil and gas sector, where it provides the termination interface for C300 controllers managing pipeline operations, refinery processes, and offshore production platforms . The HONEYWELL 51307125-175 is equally critical in chemical and petrochemical plants, where its conformal coating protects against corrosive atmospheres while ensuring robust communication between controllers and I/O modules .
In the power generation industry, the 8C-TCNTA1 supports C300 controllers in managing turbine control, boiler systems, and plant-wide automation . The pharmaceutical and food processing sectors leverage the HONEYWELL 8C-TCNTA1 for its modular, maintainable design that supports validated processes requiring high reliability .
The HONEYWELL 51307125-175 is also essential for system modernization projects, enabling facilities to upgrade from legacy DCS platforms to the Series 8 architecture while preserving existing field wiring infrastructure . Its dual FTE ports and redundant I/O Link interfaces make it a core component for critical infrastructure applications where system availability is paramount .
