Honeywell CC-PDIS01 Digital Input Module 24VDC SOE

Honeywell CC-PDIS01 Digital Input Module – 32-Channel 24VDC SOE Monitoring

The Honeywell CC-PDIS01 (Manufacturer Part Number: 51405042-176 / 51405042-175) is an industrial-grade, 32-channel discrete sequence of events (DISOE) module engineered for the Honeywell Experion® Process Knowledge System (PKS) Series C architecture. Designed to meet the stringent demands of high-reliability process automation, offshore machinery spaces, and marine power plants, the CC-PDIS01 captures discrete field contact states with hardware-level 1-millisecond resolution time-stamping.

Operating natively at nominal 24VDC, this module eliminates ambiguity during complex plant trip sequences, turbine emergency shutdowns (ESD), and generator switchgear operations. By logging digital state transitions directly at the I/O bus interface rather than relying on standard controller cycle scans, the CC-PDIS01 prevents root-cause obfuscation during cascading alarms. It mounts onto specialized Series C Input/Output Termination Assemblies (IOTAs), featuring conformal coating to protect sensitive logic arrays from corrosive salt mist, hydrogen sulfide, thermal shock, and high-vibration maritime environments.

Model Details

• Model Number: CC-PDIS01
• Base MPN / Hardware Part Numbers:
  • 51405042-176 (Standard coated production revision)
  • 51405042-175 (Functional equivalent hardware revision)
• Related Functional Siblings:
  • CC-PDIL01 / 51405040-175 (Standard 24VDC Digital Input Module without 1ms SOE tagging)
  • 8C-PDISA1 (Series 8 equivalent form-factor DISOE module)
• Matching Termination Assemblies (IOTA):
  • CC-TDIS01 / 51308365-175 (Non-redundant 32-channel IOTA, 9-inch)
  • CC-TDIS11 / 51308365-275 (Redundant 32-channel IOTA, 12-inch)

Technical Specifications

Key Features

1. Sub-Millisecond Event Attribution: Provides true 1 ms hardware-clock time-stamping on all 32 channels simultaneously, enabling unambiguous post-trip root cause analysis across complex interlocks.
2. Configurable Operational Scanning Modes: Supports three software-selectable execution modes: Normal Mode (20 ms process variable scan), SOE Mode (1 ms event capture resolution with 20 ms scan), and Low Latency Mode (5 ms deterministic scan).
3. Advanced Open-Wire & PV Diagnostics: Features comprehensive line integrity monitoring that detects severed field loops and flags process variables as “Invalid” to prevent unintended control actions.
4. Flexible Excitation Architecture: Field loop interrogation voltage can be routed from onboard Series C filtered power distribution or driven via galvanically separated external non-incendive power networks.

Compatibility

• Controllers: C300 Controller, C300-CNI, and Embedded Simulation Processors.
• Compatible IOTA Carrier Bases:
  • Non-Redundant: CC-TDIS01
  • Redundant: CC-TDIS11
• System Engineering Software: Experion Control Builder (Engineering Studio) R300, R400, R430, R500, and R510+ series.
• Cabinet Power Systems: Integrates with Honeywell standard power distribution units (e.g., CC-PWRR01, CC-PWRN01).

Applications

• Marine Dynamic Positioning (DP2/DP3) Thruster Trips: Capturing synchronous trip feedback from electric propulsion drives, hydraulic valves, and steering gear systems to detect failure propagation.
• Turbomachinery & Gas Compressor Protection: High-speed monitoring of turbine overspeed trips, lube-oil pressure collapse, and flame detection interlocks.
• Marine Emergency Shutdown (ESD) Systems: Real-time logging of bridge pushbuttons, gas release valves, bulk-cargo vapor alarms, and machinery-space water ingress switches.
• High-Voltage Marine Switchgear Trip Coordination: Sequence-of-events recording across medium-voltage vacuum circuit breakers (VCB), generator reverse-power relays, and bus-tie tiebreakers.
• Boiler & Burner Management Systems (BMS): Microsecond-accurate tracking of purge verification, fuel shut-off valving, and draught fan pressure failures.

Frequently Asked Questions

What is the functional difference between the Honeywell CC-PDIS01 and CC-PDIL01?

The CC-PDIS01 is designed for Sequence of Events (SOE) logging with dedicated hardware-level 1-millisecond resolution time-stamping. The CC-PDIL01 is a standard discrete input module that updates states on the standard 20ms controller cycle without sub-millisecond event tags.

Can the CC-PDIS01 run in redundant configurations?

Yes. When paired with the redundant 12-inch IOTA carrier (CC-TDIS11), two CC-PDIS01 modules operate in a redundant pair. The secondary module tracks active field transitions and can execute bumpless failover without losing event sequence history.

Does the CC-PDIS01 provide loop power for dry contacts?

Yes. The module supports internally wetted power topologies from the Series C internal power rail, as well as externally marshalled 24VDC supplies. This eliminates the need for external interposing relays on low-power dry contact loops.

What causes an “Invalid PV” alarm state on a CC-PDIS01 channel?

An “Invalid PV” status indicates that internal diagnostics detected an open-wire field loop fault or out-of-spec sense current, causing the module to lock the channel’s process variable to prevent downstream logic errors.

Are CC-PDIS01 modules interchangeable between Series C and Series 8 racks?

No. The CC-PDIS01 is built for Honeywell Experion Series C racks and IOTA bases. Series 8 systems utilize the alternate form-factor module part number 8C-PDISA1.