Honeywell CC-TSP411 51306669-175 Rev A SPM IOTA

Honeywell CC-TSP411 51306669-175 Rev A Speed Protection Module (SPM) IOTA

The Honeywell CC-TSP411 (Part Number: 51306669-175, Revision A) is an 18-inch redundant Input/Output Termination Assembly (IOTA) purpose-built for the Honeywell Experion® PKS Series C architecture. Engineered specifically to interface with redundant CC-PSP401 Speed Protection Modules (SPM), this termination base routes critical pulse and electromagnetic pickup (MPU) signals from rotating machinery into the control environment while maintaining hardware-enforced electrical separation and fail-safe trip paths.

From a marine systems and turbomachinery perspective, overspeed protection is a non-negotiable safety barrier. The CC-TSP411 IOTA provides the physical infrastructure to accept passive (variable reluctance) and active (eddy-current/Hall effect) speed probes, auxiliary analog inputs (e.g., valve position, shaft thrust), and dedicated trip interlocking circuits. Designated by the “CC” prefix, this assembly features military-grade conformal coating, making it impervious to the corrosive, high-humidity, and saline environments encountered in marine engine control rooms (ECR), offshore Floating Production Storage and Offloading (FPSO) units, and marine boil-off gas (BOG) compressor skids.

Technical Specifications

Key Features

1. 18-Inch Dual Carrier Redundancy: Accommodates two CC-PSP401 Speed Protection Modules in parallel, guaranteeing zero-downtime, bump-free switchover without tripping mission-critical marine prime movers.
2. Conformal Coated Circuit Board (ISA G3 Rated): Sealed against harsh, salt-laden sea air, airborne particulate sulfides, and relative humidity reaching 95% non-condensing.
3. High-Bandwidth Frequency Conditioning: Interfaces seamlessly with active and passive variable reluctance sensors (0.5 Vpk to 42 Vpk) across a 1 Hz to 25 kHz frequency spectrum.
4. Sub-40ms Hardware Trip Latency: Guarantees deterministic, ultra-fast trip execution during runaway speed or severe load-rejection scenarios, fulfilling API 670 machinery protection requirements.
5. Comprehensive Auxiliary I/O Matrix: Incorporates onboard termination for 8 digital inputs, 4 high-capacity form-c trip relays, 8 analog process monitoring inputs, and 1 analog tracking output.

Applications

• Marine Main Propulsion Turbines & Generators: High-speed emergency trip management on LNG carriers, naval combatants, and steam-driven tankers.
• Floating Production Storage & Offloading (FPSO) Compressors: Surge, overspeed, and reverse-rotation mitigation on export and flash-gas compressor trains.
• Power Generation Gas & Steam Turbine Sets: Direct 2-out-of-3 (2oo3) voting overspeed interlocking on Frame 6/7/9 turbines and utility-scale steam sets.
• Refinery & Chemical Process Expanders: Protection against severe catastrophic mechanical decoupling on hot-gas expanders and critical hydrocarbon booster pumps.

Compatible Hardware Modules & Carriers

• Active Processing Module: Honeywell CC-PSP401 / 51454122-175 Speed Protection Module (Slot A & Slot B)
• Controller Infrastructure: Honeywell Experion PKS Series C C300 Controller (CC-PCNT01 / CC-PCNT04 / CC-PCNT05)
• Interface Gateway: Honeywell Series C I/O Link Interface Cabling (Redundant Link A & Link B)
• Mounting Assembly: Standard Experion Series C 18-inch Vertical/Horizontal DIN Rail Channels

Part Number Cross-References

• Honeywell Model Number: CC-TSP411
• Honeywell Assembly Number: 51306669-175
• Hardware Revision Code: Rev A
• Non-Coated Equivalent Base: CU-TSP411 / 51306669-125 (Standard Commercial Version)
• Related Redundant Pulse Base: CC-TPIX11 / 51306544-175 (Pulse Input IOTA)

Frequently Asked Questions

What is the functional difference between the CC-TSP411 and the CU-TSP411?

The “CC” prefix designates a factory-applied conformal coating over the printed circuit assembly, offering protection against corrosive ambient contaminants like airborne sulfur, saltwater moisture, and extreme humidity. The “CU” designation is the uncoated commercial model meant for standard, fully climate-controlled computer room environments.

Does the CC-TSP411 termination assembly include the processing modules?

No. The CC-TSP411 (51306669-175) is the 18-inch redundant passive termination assembly (IOTA). The active processing brains—the CC-PSP401 modules—mount directly into the dedicated guide slots on this base and must be sourced separately or as part of a complete subsystem kit.

What probe types are compatible with the CC-TSP411 inputs?

The unit accommodates both passive magnetic pickup sensors (MPUs) and active digital speed probes (including Hall-effect and Eddy current proximity sensors) operating within a 1 Hz to 25 kHz input frequency range.

Can this IOTA execute an emergency trip without controller intervention?

Yes. When paired with CC-PSP401 modules, the assembly supports autonomous hardware-level overspeed trip logic (such as 2-out-of-3 voting). The trip relays drop out locally in under 40 milliseconds, ensuring equipment protection even if supervisory communication with the C300 controller experiences a temporary interruption.

How do I confirm compatibility with my existing Experion software release?

Check the hardware revision of the IOTA (Revision A) and pair it with the corresponding CC-PSP401 firmware blocks. The CC-TSP411 is supported across Experion PKS releases from R400 up through current releases; always confirm your engineering repository database includes the appropriate SPM equipment block definitions.