CC-PDIS01 51405042-176 HONEYWELL

The CC-PDIS01 is part of the Series C I/O family. It functions by monitoring discrete field signals—such as contact closures or voltage changes—and stamping each state change with a highly accurate microsecond-resolution time. Unlike standard digital input modules that are limited by controller scan cycles, the SOE module processes events locally. This ensures that even if several events occur within a few milliseconds, the system can reconstruct the exact "first-out" sequence of a trip or failure. It is typically mounted on an Input/Output Termination Assembly (IOTA) in a C300 control cabinet.

Product Parameters

The technical specifications for the CC-PDIS01 51405042-176 include:

• Channel Count: 32 channels per module.

• Input Type: Digital Input, 24 VDC (Sink/Source configuration depending on IOTA).

• Resolution: 1 millisecond (1ms) Sequence of Events time-stamping accuracy.

• Power Requirements: Typically $140 \text{ mA}$ at $24 \text{ VDC}$.

• Input Voltage Range: 18 VDC to 30 VDC.

• ON Voltage Threshold: Minimum 15 VDC.

• OFF Voltage Threshold: Maximum 5 VDC.

• Galvanic Isolation: 1500 VDC between field wiring and internal logic.

• Operating Temperature: $0^{\circ}\text{C}$ to $60^{\circ}\text{C}$ ($32^{\circ}\text{F}$ to $140^{\circ}\text{F}$).

• Module Type: Coated (standard for Series C to resist environmental corrosion).

Product Advantages

One of the standout advantages of the CC-PDIS01 is its High-Speed Event Capture. By providing 1ms resolution, it allows engineers to perform "post-mortem" analysis of system trips to identify the root cause among many cascading alarms. The Density of the module is also a benefit, providing 32 channels in a compact form factor, which reduces the overall footprint in the control room.

The module features Advanced Diagnostics, constantly checking for "bad" channel status or module health, which increases the reliability of the control loop. Because it is part of the Series C Integrated Design, it supports "Hot Swapping," meaning a faulty module can be replaced while the system is powered and running without interrupting the operation of other modules on the same IOTA.

Important Considerations and Precautions

When working with the CC-PDIS01, users must be mindful of several technical constraints. First, Time Synchronization is vital; for the SOE functionality to be meaningful across an entire plant, all C300 controllers must be synchronized to a Master Time Source (like GPS). Without this, the time stamps from different modules cannot be accurately compared.

Second, ensure the IOTA Compatibility. The CC-PDIS01 must be paired with the correct IOTA (such as the CC-TDIS01 or CC-TDIS11) to match the voltage and wiring requirements of the field devices. Third, observe Electrostatic Discharge (ESD) protocols. Like all high-density electronics, this module is sensitive to static; always use an ESD wrist strap when handling or installing the unit. Finally, check the Coating Requirements. The 51405042-176 version is usually conformally coated, but it should still be housed in an enclosure that meets the environmental classification of the site (e.g., NEMA 4 or IP66) to prevent damage from conductive dust or excessive moisture.

Product Applications

The CC-PDIS01 is utilized in industries where safety and rapid response are non-negotiable.

• Turbine Control Systems: Monitoring trip signals and auxiliary contacts in power generation to determine why a turbine shut down.

• Emergency Shutdown (ESD) Systems: In oil and gas refineries, it captures the exact order of valve closures and pressure switch activations during a safety event.

• Electrical Substation Monitoring: Tracking the status of circuit breakers and protective relays where millisecond precision is required to coordinate power distribution.

• Chemical Reactor Safety: Monitoring high-pressure and high-temperature switches to ensure the "first-out" event is identified during an exothermic reaction trip.

• Boiler Management Systems (BMS): Ensuring that fuel valves and flame detectors are operating in the correct legal sequence during startup and shutdown phases.