go on
Home>DCS>Honeywell TC-IDD321 Digital Input Module

Hot Categories

Honeywell TC-IDD321 Digital Input Module

Honeywell TC-IDD321 Digital Input Module

Item NO.: 3741710
Inquiry

Warranty: 1 year 


Condition : brand new in factory sealed box


Email: sales@mvme.cn


Chat online: +86 18030175807

Detail

  • Product NameHoneywell TC-IDD321 Digital Input Module
  • Item NO.3741710
  • Weight0.6000 kg = 1.3228 lb = 21.1644 oz
  • CategoryDCS
  • BrandHoneywell
  • Creation Time2026-08-20
  • Experion LS · CIOM-A
  • Digital Input Module
Honeywell TC-IDD321 | 32-Channel Digital Input Module

TC-IDD321

Digital Input Module Honeywell Process Solutions Experion LS I/O
Experion LS · CIOM-A
Product Overview Performance Technical Details System Integration Applications FAQ Recommended Models

Product Overview

TC-IDD321 is a high-density 32-channel digital input module from Honeywell's Experion LS I/O family, designed for the Experion PKS and PlantScape distributed control systems. It provides reliable acquisition of discrete field signals such as limit switches, pushbuttons, and relay contacts.

The module features 32 input channels arranged in two isolated groups of 16 points per common, enabling clean interfacing with dry contacts, proximity sensors, and electronic switches. It operates with a nominal input voltage of 24 VDC and integrates IEC Type 1+ input compatibility for secure signaling thresholds.

The TC-IDD321 is part of the Chassis Input/Output Modules Series A (CIOM-A) platform and is compatible with standard Honeywell DCS and PlantScape systems. It supports legacy TDC2000, TDC3000, and PlantScape systems in addition to modern Experion platforms.

32 channels 24 VDC IEC Type 1+ 1500 VDC isolation Experion LS
Key details
  • Honeywell Experion LS I/O
  • 32-point digital input module
  • 24 VDC nominal input voltage
  • 16 points per common group
  • TC-TBNH 36-position terminal block

Performance

Signal acquisition & accuracy

  • High-density input capability — 32 channels in a single module optimize backplane slot efficiency while providing robust discrete signal acquisition.
  • IEC Type 1+ compliance — Provides precise state detection thresholds with a minimum on-state current of 2 mA and maximum off-state current of 1.5 mA, ensuring reliable signal interpretation.
  • Programmable input delay — Configurable input filters (0 ms, 1 ms, 2 ms) allow optimization for different field device types and noise environments.

Reliability & protection

  • Galvanic isolation — 1500 VDC isolation between channels and from the system bus ensures signal integrity and protects the backplane from voltage transients.
  • Isolated common groups — Two independent 16-point groups mitigate group-to-group loop cross-talk and simplify field wiring.
  • High reliability — Designed for continuous operation in industrial environments with a wide operating temperature range of -20°C to +65°C.

Technical Details

Electrical specifications

Manufacturer Honeywell Process Solutions
Model TC-IDD321
Product type Digital Input Module
System series Experion LS I/O
Input channels 32 (16 points per common)
Nominal input voltage 24 VDC (10-31.2 VDC)
On-state current (min) 2 mA
Off-state voltage (max) 5 V
Off-state current (max) 1.5 mA
Input compatibility IEC Type 1+
Isolation voltage 1500 VDC (channel-channel, user-system)
Power dissipation 6.1 W max
Input delay (off-to-on) Programmable: 0 ms, 1 ms, 2 ms; Hardware: 1 ms max
Input delay (on-to-off) Programmable: 0 ms, 1 ms, 2 ms, 9 ms, 18 ms; Hardware: 1 ms max

Physical & environmental

Mounting CIOM-A chassis backplane
Terminal block TC-TBNH (36-position)
Country of origin United States
Operating temperature -20°C to +65°C
Storage temperature -40°C to +85°C
Protection rating IP20
Compatible systems Experion PKS, PlantScape, TDC2000, TDC3000
Note: The TC-IDD321 requires a TC-TBNH 36-position terminal block for field wiring connections.

System Integration

The TC-IDD321 is designed for seamless integration into Honeywell Experion LS and CIOM-A systems.

Compatibility & integration

System Experion LS, Experion PKS
Backplane CIOM-A chassis
Terminal block TC-TBNH (36-position)
Compatible controllers C300, Experion LS controllers
Legacy compatibility TDC2000, TDC3000, PlantScape
Input grouping 2 isolated groups (16 points each)
System integration notes:
  • The TC-IDD321 must be installed in a CIOM-A chassis backplane. Verify the target slot is clean and properly aligned before insertion.
  • Use the TC-TBNH 36-position removable terminal block for field wiring connections. Secure the terminal assembly directly over the front card layer.
  • The module's 32 channels are split into two independent, galvanically isolated groups of 16 points per common. This design mitigates group-to-group loop cross-talk.
  • For legacy TDC2000, TDC3000, and PlantScape systems, verify compatibility with your specific system revision.
Related components: TC-TBNH (terminal block), TC-ODD321 (digital output module), TC-IDD321 (digital input module)

Applications

The TC-IDD321 is widely deployed in process and discrete control applications requiring high-density digital input monitoring.

Limit switch monitoring
Pushbutton status sensing
Relay contact monitoring
Valve position feedback
Safety interlock monitoring
Circuit breaker status
Proximity sensor interfacing
Alarm point acquisition
Typical industries: Oil & gas refining, petrochemical processing, power generation, chemical manufacturing, water & wastewater treatment, and pulp & paper.
Legacy system support: The TC-IDD321 is ideal for building or servicing legacy Honeywell TDC2000, TDC3000, and PlantScape systems, providing a modern interface while maintaining backward compatibility.

FAQ – Frequently Asked Questions

Q1: What terminal block is required for TC-IDD321?

The module uses the TC-TBNH 36-position terminal block for field wiring connections.

Q2: How are the input points grouped?

The 32 channels are split into two independent, galvanically isolated groups, providing 16 points per shared common return.

Q3: What is the minimum current required for a channel to register an on-state?

A channel registers a clear on-state condition when the circuit current reaches a minimum threshold of 2 mA.

Q4: Is TC-IDD321 compatible with legacy TDC 3000 systems?

Yes, the module is compatible with standard Honeywell DCS and PlantScape systems, including TDC2000, TDC3000, and PlantScape systems.

Q5: What is the isolation voltage of TC-IDD321?

The module provides 1500 VDC isolation between channels and from the system bus, ensuring robust protection and signal integrity.

Q6: Can the input delay be configured?

Yes, the input delay is programmable. Off-to-on delay can be set to 0 ms, 1 ms, or 2 ms. On-to-off delay can be set to 0 ms, 1 ms, 2 ms, 9 ms, or 18 ms.

You May Also Like