Honeywell CC-TCNT01 51308307-175 Retrofit I/O Termination

Honeywell CC-TCNT01 51308307-175 Retrofit I/O Termination Module: Legacy System Compatibility & Smooth Upgrade

The Honeywell CC-TCNT01 (Part No. 51308307-175) is a ruggedized I/O termination module engineered for the Honeywell Experion PKS C300 controller platform. Designed to serve as a direct retrofit-compatible replacement for aging or discontinued termination assemblies in legacy distributed control system (DCS) installations, this module enables plant engineers and automation integrators to extend the operational life of existing control cabinets without requiring a full system overhaul. Whether you are managing a brownfield upgrade, replacing end-of-life spare parts, or migrating from an older Honeywell TDC 3000 or PlantScape architecture, the CC-TCNT01 provides a reliable, field-proven termination solution that minimizes engineering rework and reduces total retrofit cost.

The module interfaces directly with the C300 controller backplane and supports the standard CHARM I/O architecture, allowing seamless integration with existing field wiring without re-termination. Its ruggedized construction makes it suitable for harsh industrial environments including petrochemical plants, power generation facilities, pulp and paper mills, and offshore platforms where vibration, humidity, and temperature extremes are common operating conditions.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the CC-TCNT01 into an existing control system begins well before the module arrives on site. During the pre-engineering phase, the project team must audit the existing cabinet layout to confirm available rack slots, backplane revision compatibility, and whether the installed CC-PCNT01 power conditioner module can support the additional load introduced by the new termination assembly. Power budget calculations should account for all active CHARM I/O modules sharing the same backplane segment, including any CC-IP0101 PROFIBUS interface modules or CC-PAIH01 analog input CHARM modules already installed in adjacent slots.

Terminal block wiring is one of the most critical steps in any termination module replacement. Engineers should photograph and document all existing field wiring connections before removal, paying close attention to signal type (4–20 mA, discrete, thermocouple, RTD), wire gauge, and shield grounding practices. The CC-TCNT01 uses a standard screw-type terminal block pitch; however, if the legacy installation used a different pitch or a marshalling cabinet with intermediate junction blocks, an adapter plate or re-termination may be required. Cross-referencing the existing I/O schedule against the new module’s channel map will prevent signal inversion or address conflicts during commissioning.

For sites migrating from older Honeywell PM I/O or HPM (High-Performance Process Manager) hardware, the retrofit path typically involves installing a new CC-TCNT01 termination module alongside a compatible CC-PAOH01 analog output CHARM or CC-PDOB01 digital output CHARM, depending on the field device type. The CHARM I/O architecture allows individual channel-level replacement, which means only the affected I/O points need to be taken offline during the swap — a significant advantage over legacy card-based systems where an entire 16-channel card had to be removed to replace a single faulty channel.

Communication link verification is equally important. The C300 controller communicates over FTE (Fault Tolerant Ethernet), and any changes to the CHARM I/O configuration must be reflected in the Experion PKS Control Builder project. Before going live, the engineering team should perform a full I/O checkout using the Experion Station HMI to confirm that all field signals are correctly mapped, alarm limits are intact, and PID loop parameters have been preserved from the original configuration. If the site uses a Honeywell HC900 hybrid controller in a parallel loop, ensure that the communication link between the HC900 and the C300 network is not disrupted during the termination module swap.

Installation space confirmation is a frequently overlooked step. The CC-TCNT01 requires adequate clearance for cable management on both the field wiring side and the backplane connector side. In congested control cabinets, this may require temporary relocation of adjacent CC-SCMB02 system cabinet mounting brackets or rerouting of existing cable trays before the new module can be seated correctly.

Downtime Control During System Migration

Minimizing production downtime during a termination module replacement requires a structured hot-swap or controlled-outage strategy. For non-critical I/O loops, the CC-TCNT01 can often be installed during a planned maintenance window of four to eight hours, provided that all pre-engineering work — wiring documentation, spare parts staging, Experion Builder backup, and HMI screen verification — has been completed in advance.

Before initiating the physical swap, the control engineer should place all affected PID loops into manual mode at the Experion operator station and confirm with the field operator that the associated final control elements (control valves, motor starters) are in a safe state. The original Experion PKS project file should be backed up to a secure network location, and a printed copy of the I/O assignment table should be available at the cabinet for reference during wiring reconnection.

Once the CC-TCNT01 is physically installed and field wiring is reconnected, the CHARM modules must be re-assigned in Control Builder and downloaded to the C300 controller. This process typically takes 15–30 minutes per controller segment, depending on the number of CHARM I/O points being reconfigured. After download, perform a point-by-point I/O verification at the Experion Station before returning loops to automatic mode. For sites with redundant C300 controllers, the switchover can be performed without interrupting the process by migrating one controller at a time while the redundant unit maintains control.

NINERMAS supplies the CC-TCNT01 (51308307-175) with a pre-shipment functional test report, confirming that the module has been bench-tested against Honeywell factory specifications before dispatch. This reduces the risk of receiving a defective unit and shortens on-site commissioning time. All units are covered by a 12-month warranty from the date of shipment, with technical support available throughout the warranty period.

Retrofit Support FAQ

Q1: Is the CC-TCNT01 (51308307-175) a direct replacement for my existing Honeywell termination module?
A: The CC-TCNT01 is designed for use within the Honeywell Experion PKS C300 CHARM I/O architecture. Before confirming compatibility, verify your existing module part number, backplane revision, and CHARM module type. NINERMAS technical staff can assist with cross-referencing your existing BOM against the CC-TCNT01 specification sheet.

Q2: What commissioning steps are required after installing the CC-TCNT01?
A: After physical installation and field wiring reconnection, you must re-assign the CHARM I/O modules in Experion Control Builder, download the updated configuration to the C300 controller, and perform a full I/O checkout at the Experion operator station. Verify all signal values, alarm limits, and loop modes before returning to automatic control.

Q3: Does NINERMAS provide pre-shipment testing for the CC-TCNT01?
A: Yes. Every CC-TCNT01 unit supplied by NINERMAS undergoes a functional bench test prior to shipment. A test report is included with the delivery documentation. All units carry a 12-month warranty from the date of shipment.

Q4: What is the typical lead time and stock availability for the CC-TCNT01 51308307-175?
A: NINERMAS maintains inventory of the CC-TCNT01 to support urgent retrofit and breakdown replacement requirements. Standard lead time for in-stock units is 3–7 business days for international shipment. Contact our sales team for real-time stock confirmation and expedited shipping options.