TC-IDD321 Honeywell 32-Point Digital Input Card

Product Overview

The Honeywell TC-IDD321 (Part Number: 97066878) is a high-density Digital Input (DI) module designed for the Experion® PKS C200 and C200E controller platforms. This module facilitates the acquisition of discrete signals from field devices such as limit switches, push buttons, and motor starter contacts. Operating at 24 VDC, it monitors 32 independent points, converting physical contact states into deterministic data for the Control Execution Environment (CEE). We provide this module as 100% Brand New and Original, ensuring the reliable logic processing required for ISA S88.01 batch control and robust process automation.

Technical Specifications

The TC-IDD321 utilizes a high-density 32-point architecture to maximize I/O capacity within the C200 chassis while maintaining low power consumption.

Engineering Advantages

• High-Density Logic Acquisition: The 32-point configuration of the TC-IDD321 allows engineers to consolidate a high volume of discrete field signals into a single slot. This reduces the number of required I/O racks and minimizes the overall cabinet footprint in large-scale batch and process facilities.

• Deterministic CEE Integration: This module communicates directly with the C200/C200E core software. By ensuring fixed-interval scanning of all 32 points, it provides the deterministic performance necessary for high-speed interlocking and safety-related logic execution.

• Robust Noise Filtering: Honeywell incorporates integrated hardware debouncing and electrical isolation on every input point. This prevents "contact bounce" and electromagnetic interference (EMI) from triggering false signals, ensuring the controller receives a clean, accurate representation of field states.

• Full Batch Management Support: The TC-IDD321 supports the ISA S88.01 batch control standard when used with C200E controllers. It provides the reliable discrete feedback necessary for complex batch sequencing, phase logic, and state-based control transitions.

• Simplified Maintenance & Diagnostics: The module features front-panel status indicators that provide immediate visual confirmation of input activity. These diagnostics, coupled with the Experion PKS system alarms, allow technicians to isolate field-side wiring faults rapidly without interrupting the controller operation.

FAQs

• What is the difference between the TC-IDD321 and TC-IDD321-A/B/C suffixes?

  The lettered suffixes (e.g., -A, -B) typically denote minor hardware revisions or manufacturing lot updates. The core functionality and electrical specifications remain identical, making the TC-IDD321 a universal replacement across these sub-revisions.

• Can I use this module in a redundant C200 configuration?

  Yes. The TC-IDD321 functions seamlessly in both single and fully redundant C200/C200E architectures. The I/O link manages the data synchronization, ensuring that both primary and secondary controllers receive identical input states for bumpless failover.

• Does the TC-IDD321 require external power for the 24VDC inputs?

  While the module draws its internal logic power from the C200 backplane, the field-side loops require an external 24VDC power source to sense the contact states. You typically distribute this through the I/O termination assembly.

• Is the 97066878 part number compatible with C200E controllers?

  Absolutely. The TC-IDD321 is fully compatible with both the C200 and the newer C200E controllers. It utilizes the standard CEE function blocks, ensuring consistent performance regardless of which control processor is managing the rack.