Overview
Manuals
Speed Protection Role
Interface Counts
IOTA and Timing
Features:
- Four active or passive speed inputs with two-out-of-three voting.
- Protection and auxiliary interfaces include eight DI, four DO, eight AI and one AO.
- Honeywell specifies CC-TSP411 redundant IOTA and an overall trip loop within 40 ms.
Honeywell's Experion Series C Turbomachinery I/O specification section 8 expressly names CC-PSP401 as the Speed Protection Module. It takes as many as four speed-probe pulse inputs, performs signal conditioning and two-out-of-three voting, and computes speed and acceleration. Configurable limits can trigger overspeed protection through relays on its associated IOTA; the voted speed can also be used by a control loop in the C300. The specification lists four speed inputs, eight digital inputs, four digital outputs, eight analog inputs and one analog output. These are interface counts, not 26 identical inputs, and the connected instrument and protection design determine which functions are configured.
The Honeywell table identifies CC-TSP411 as the redundant eighteen-inch IOTA for CC-PSP401. It lists magnetic pickup range 150 Hz to 25 kHz, active pickup range 1 Hz to 10 kHz, 2.5 ms speed-input scanning, and an overall input-change-to-protection-device loop latency within 40 ms. The document also gives speed-probe diagnostics and configurable speed and acceleration trip limits. The current website mistakenly describes CC-PSP401 as a power-system component; those power-distribution claims should be removed. Do not promise a trip response without reviewing probe wiring, IOTA relays, redundancy, voting, configuration and the complete installed safety function. The PDF does not map the site's extra 51454122-175 number, which needs physical-label or manufacturer parts-record confirmation.
The CC-PSP401 51454122-175 Honeywell Series C Speed Protection Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell CC-PSP401 51454122-175 documentation and reference links.
Direct Honeywell October 2019 Series C Turbomachinery I/O Specification, section 8 and pages 11–13. Confirm the additional 51454122-175 label separately.
CC-PSP401 is the Honeywell Series C Speed Protection Module, not a cabinet power-supply module. The reviewed OEM specification describes speed-probe conditioning, speed and acceleration calculation, two-out-of-three voting and configurable protection limits. A voted speed can feed a C300 control loop, but any trip function depends on the full engineered sensor, IOTA relay and final-element chain. Confirm the actual unit marking and approved protection architecture.
The OEM section lists four active or passive speed inputs, eight digital inputs, four digital outputs, eight analog inputs and one analog output. These distinct interface groups should not be collapsed into a generic channel count or treated as interchangeable. Magnetic pickups and active pickups have different documented frequency ranges and connection conditions. Match each configured probe, trip input, output contact and analog path to the installation drawings before a replacement is released.
The manufacturer pairs CC-PSP401 with the CC-TSP411 redundant eighteen-inch IOTA. Its table lists 2.5 ms speed input scanning and states overall input-change-to-protection-device latency within 40 ms for the specified design. Those figures do not by themselves certify the site protection loop; wiring, relay response, voting configuration and final device must be evaluated. The additional 51454122-175 number is not mapped by the cited OEM PDF.
