Description

The Honeywell CC-TCNT01 is a dedicated Control Network Terminator module designed for use within the Honeywell Experion® Process Knowledge System (PKS), specifically as an integral component of the C300 Controller chassis. As part of Honeywell’s high-availability distributed control architecture, the Honeywell CC-TCNT01 serves as the physical and electrical termination point for the Fault Tolerant Ethernet (FTE) network at the end of a daisy-chained controller or I/O segment. Without proper termination, signal reflections on the FTE backbone can cause data corruption, packet loss, or network instability—making the Honeywell CC-TCNT01 essential for maintaining deterministic communication between controllers, I/O modules, and operator stations.

Positioned in the last slot of a C300 controller rack, the Honeywell CC-TCNT01 ensures impedance matching across the FTE network medium (whether copper or fiber), thereby preserving signal integrity at speeds up to 1 Gbps. It requires no configuration or firmware and operates passively, yet its role is critical in achieving the “five-nines” (99.999%) availability that Experion PKS systems are known for in oil & gas, refining, chemical, and power generation applications. The Honeywell CC-TCNT01 supports both standard and redundant FTE topologies and is engineered for seamless hot-swap maintenance—allowing replacement without powering down the entire controller chassis.

Technical Specifications

Main Features and Advantages

Essential for FTE network integrity: The Honeywell CC-TCNT01 is not an active processor but a precision-engineered passive terminator that matches the characteristic impedance of the FTE cabling (typically 100 Ω for twisted-pair). This prevents signal reflections that could otherwise distort Ethernet frames, especially at gigabit speeds over long cable runs. In redundant FTE rings used in Experion PKS, each physical chain must be properly terminated at both ends—making the Honeywell CC-TCNT01 a non-negotiable component for stable network operation.

Seamless integration with C300 architecture: Designed exclusively for the C300 controller family, the Honeywell CC-TCNT01 plugs directly into the standardized backplane without requiring jumpers, dip switches, or software setup. Its mechanical keying ensures it can only be installed in the correct orientation and slot, reducing human error during commissioning or maintenance. The module occupies the final slot in the chassis, clearly indicating the end of the local FTE segment.

Robust industrial design and serviceability: Encased in a metal-reinforced housing with conformal-coated circuitry, the Honeywell CC-TCNT01 withstands vibration, humidity, and electrical noise typical of process plants. Despite being a passive unit, it features robust connectors and thermal management to ensure decades of reliable service. Its hot-swappable nature means technicians can replace a damaged or outdated Honeywell CC-TCNT01 during normal operations—critical in continuous-process facilities where shutdowns cost millions per hour.

Support for future-proof network topologies: Whether deploying copper-based FTE for short links or fiber-optic FTE for EMI-prone or long-distance runs (up to 2 km), the Honeywell CC-TCNT01 works in conjunction with appropriate FTE interface modules (e.g., CC-TFITE) to maintain end-to-end signal quality. This flexibility allows plants to evolve their network infrastructure while retaining core control hardware.

Application Field

The Honeywell CC-TCNT01 is deployed wherever Honeywell Experion PKS C300 controllers are used to manage mission-critical processes. In oil refineries, it terminates FTE networks connecting C300 controllers that regulate crude distillation columns, hydrotreaters, and fluid catalytic crackers—ensuring uninterrupted communication between safety systems and basic process control. In LNG terminals, the Honeywell CC-TCNT01 helps maintain network stability across cryogenic loading arms and storage tank farms, where fiber-optic FTE links span hundreds of meters through electrically noisy environments.

In chemical plants producing polymers or specialty chemicals, precise batch sequencing relies on millisecond-level coordination between C300 controllers; any network jitter caused by improper termination could result in off-spec product or reactor runaway. The Honeywell CC-TCNT01 eliminates this risk by guaranteeing clean signal transmission. Similarly, in combined-cycle power plants, where C300 controllers manage HRSG drum level, turbine bypass, and emissions controls, the redundancy and determinism enabled by proper FTE termination—including the Honeywell CC-TCNT01—are vital for grid compliance and equipment protection.

During system expansions or brownfield upgrades, engineers often add new C300 racks to existing FTE rings. Each new chain must be correctly terminated, making the Honeywell CC-TCNT01 a frequently required spare part. Its presence may seem minor, but in the Experion PKS ecosystem, the Honeywell CC-TCNT01 is the silent guardian of network reliability—ensuring that data flows flawlessly from sensor to actuator, even under the most demanding conditions.

Related Products

Honeywell CC-TFITE: FTE Interface Module for C300—provides dual redundant Ethernet ports (copper or fiber); works in tandem with CC-TCNT01 for complete network connectivity.
Honeywell CC-TCLK01: Clock Synchronization Module for C300—enables time-stamping accuracy across the PKS system; installed in same chassis as CC-TCNT01.
Honeywell CC-TCON01: Controller Power Supply Module—powers the C300 chassis where CC-TCNT01 is installed.
Honeywell C300 Controller Baseplate: Backplane assembly that hosts CC-TCNT01, I/O modules, and controller CPUs.
Honeywell CC-TAI01 / CC-TDI01: Analog and digital I/O modules used alongside CC-TCNT01 in C300 racks for field signal acquisition.
Honeywell FTE Switch (e.g., H01-TSW01): Managed Ethernet switch designed for Experion PKS FTE networks—forms the backbone that CC-TCNT01-terminated segments connect to.
Honeywell Experion R510/R520 Workstation: Engineering and operator stations that communicate with C300 controllers via the FTE network terminated by CC-TCNT01.

Installation and Maintenance

Pre-installation preparation: Before installing the Honeywell CC-TCNT01, confirm that it is intended for the last physical slot in a C300 controller chassis within an Experion PKS FTE segment. Ensure the system is in a safe state—while the module is hot-swappable, best practice is to install during planned maintenance windows. Verify that the adjacent FTE interface module (e.g., CC-TFITE) is properly seated and that network cabling follows Honeywell’s FTE topology guidelines (no stubs, max segment lengths observed). Handle the Honeywell CC-TCNT01 with ESD precautions, as static discharge can damage internal termination resistors.

Maintenance recommendations: The Honeywell CC-TCNT01 contains no moving parts or consumables and typically requires no routine maintenance. However, if network diagnostics indicate excessive CRC errors or intermittent link drops on a C300 FTE segment, inspect the Honeywell CC-TCNT01 for physical damage, loose seating, or corrosion on backplane contacts. Clean connector pins with isopropyl alcohol if oxidation is suspected. Replace the Honeywell CC-TCNT01 immediately if the module housing is cracked or if it has been exposed to moisture ingress. Although passive, a faulty terminator can destabilize an entire FTE ring—so treat it as a critical spare. Always keep a verified spare Honeywell CC-TCNT01 in inventory for rapid recovery.