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CC-TCF901 (Part No. 51308301-175) is a 9‑port Control Firewall Input/Output Termination Assembly (IOTA) for the Honeywell Experion PKS Series C architecture. It provides the physical mounting interface, electrical connection, and power distribution for the CC-PCF901 Control Firewall module, which is designed to shield C300 controllers and Series C Fieldbus Interface Modules (FIMs) from disruptive network traffic at the supervisory level.
The CC-TCF901 features 9 RJ‑45 Ethernet ports: 8 downlink ports for local FTE (Fault Tolerant Ethernet) connections to in‑cabinet controllers, and 1 dedicated uplink port to the supervisory FTE network. It integrates 24 VDC power distribution directly through the backplane, eliminating the need for separate terminal strips. The module is built with an industrial‑grade form factor and supports G3 conformal coating for corrosion protection in harsh environments.
| Manufacturer | Honeywell Process Solutions |
| Model | CC-TCF901 |
| Part Number | 51308301-175 |
| Product type | Control Firewall IOTA (CF9) |
| Total ports | 9 × RJ-45 Ethernet |
| Port allocation | 8 downlink + 1 uplink |
| Network protocol | Fault Tolerant Ethernet (FTE) |
| Supply voltage | 24 VDC |
| Current draw | 0.112 A (typical) [citation:10] |
| Fiber optic support | CC-FSMX01 (single-mode), CC-FMMX01 (multi-mode) |
| Operating temperature | -40°C to +70°C |
| Storage temperature | -40°C to +85°C |
| Relative humidity | 5% – 95% RH (non-condensing) |
| Environmental protection | G3 conformal coating (standard) |
| Certifications | CE, UL, CSA |
| Downlink ports | 8 × RJ-45 (FTE for C300 controllers / FIMs) |
| Uplink port | 1 × RJ-45 (supervisory FTE network) |
| Fiber module slots | Optional SFP support |
| Single-mode fiber | CC-FSMX01 (LC connector, 1300 nm) |
| Multi-mode fiber | CC-FMMX01 (MT-RJ connector, 1300 nm) |
| Fiber module current | 0.30 mA @ 24 VDC (additional) |
| Power distribution | Integrated 24V DC backplane bus |
| Mounting | Series C carrier or backplane |
| Hot‑swap | Supported (with ESD precautions) |
| Coating | G3 conformal coating |
The CC-TCF901 serves as the physical foundation for the Control Firewall function within the Experion PKS architecture. It is a passive IOTA (Input/Output Termination Assembly) that provides the electrical and mechanical interface for the active CC-PCF901 firewall module.
The IOTA functions as a traffic arbiter on the Fault Tolerant Ethernet (FTE) network, ensuring critical control messages are prioritized over non‑essential broadcast or multicast traffic. By isolating the C300 controller network from higher‑level supervisory traffic, it prevents "broadcast storms" and other network anomalies from impacting deterministic process execution.
The 9th port is intentionally designed with internal queue prioritization that gives precedence to downlink traffic if the network fabric becomes saturated. This ensures that controller telemetry using ports 1‑8 is not disrupted by uplink congestion.
The CC-TCF901 is designed to integrate with the following Honeywell Experion PKS components and modules.
| Control Firewall Module | CC-PCF901 (plugs directly into this IOTA) |
| Mark II variant | DC-TCF901 (for Series C Mark II cabinets) |
| Single-mode fiber module | CC-FSMX01 (LC connector, 1300 nm) |
| Multi-mode fiber module | CC-FMMX01 (MT-RJ connector, 1300 nm) |
| C300 Controllers | CC-PCNT01, CC-PCNT02 |
| Series C I/O modules | CC-PFB401, CC-PAIH01, etc. |
| FTE Bridge Module | CC-TFB401, CC-FIMB01 |
| Horizontal 9-port IOTA | CC-HCN911 (alternative FTE IOTA) |
The CC-TCF901 is deployed in critical industrial control environments where network security and high availability are essential.
CC-TCF901 is the IOTA/baseplate that provides the physical mounting and electrical interface. CC-PCF901 is the active Control Firewall module that plugs into it. Both are required for firewall protection.
No. 8 ports are downlink ports for local devices (C300 controllers and FIMs). 1 port is reserved as the uplink to the supervisory FTE network.
Standard ports are RJ‑45 copper. Fiber is supported via optional SFP modules: CC-FSMX01 for single‑mode and CC‑FMMX01 for multi‑mode fiber.
The -175 suffix indicates G3 conformal coating, providing protection against corrosion from sulfur, salt, and other airborne contaminants in harsh industrial atmospheres.
No. It is a specialized Control Firewall IOTA designed for Honeywell's proprietary FTE protocol. It uses embedded logic to prioritize control data, which a standard commercial switch cannot replicate.
In a standard Experion PKS setup, two CC-TCF901 IOTAs are installed (Yellow and Green networks) to provide a fully Fault Tolerant Ethernet environment, ensuring no single point of network failure.
| No. | Model | No. | Model | No. | Model |
|---|---|---|---|---|---|
| 1 | CC-PCF901 | 11 | CC-PAOH11 | 21 | CC-PFB401 |
| 2 | DC-TCF901 | 12 | CC-PAIH01 | 22 | CC-TFB401 |
| 3 | CC-FSMX01 | 13 | CC-PAIX01 | 23 | CC-FIMB01 |
| 4 | CC-FMMX01 | 14 | CC-PDIL01 | 24 | CC-HCN911 |
| 5 | CC-PCNT01 | 15 | CC-PDOH01 | 25 | TC-IAOH61 |
| 6 | CC-PCNT02 | 16 | CC-PDIX01 | 26 | TC-IAIH61 |
| 7 | CC-PAOH01 | 17 | CC-PDOX01 | 27 | 51304380-100 |
| 8 | CC-PAOX01 | 18 | CC-PTNT01 | 28 | 51304380-200 |
| 9 | CC-PAIX01 | 19 | CC-PTNT02 | 29 | 51402573-250 |
| 10 | CC-PAIH01 | 20 | CC-PUIO01 | 30 | CC-TAOX01 |