Honeywell | TC-IDD321 | Experion LS 32-Point Digital Input Module

Overview
The TC-IDD321 is a 32-channel Digital Input Module engineered for Honeywell Experion LS and compatible control platforms. Its high-density design captures discrete DC signals from field devices, offering reliable monitoring for sensors, pushbuttons, limit switches, and other industrial inputs. The rugged construction ensures durability in harsh industrial environments while maintaining ease of installation and maintenance.

Specifications

• Model & Part Number: TC-IDD321

• Product Type: Digital Input I/O Module

• Number of Inputs: 32 (organized as 2 groups of 16 points)

• Input Voltage Range: 10–31.2 VDC at 60°C

• Nominal Input Voltage: 24 VDC

• On-State Current (Minimum): 2 mA

• Off-State Voltage (Maximum): 5 V

• Off-State Current (Maximum): 1.5 mA

• Isolation Voltage:

• Channel-to-channel: 1500 VDC, tested 1 second

• User-to-system: 1500 VDC, tested 1 second

• Input Delay Time:

• Off-to-on: Hardware delay, programmable filter 1 ms or 2 ms

• On-to-off: Hardware delay, programmable filter 0 ms, 1 ms, 2 ms, 9 ms, or 18 ms

• Power Dissipation: 6.1 W maximum

• Short/Inrush Current: 250 mA peak (decays to <37% in 22 ms, without activation)

• Input Compatibility: IEC Type 1+

• Backplane Current: See module power consumption data

• Connection Terminal Block: TC-TBCH, 36-position terminal block

• Operating Environment: Designed for industrial environments with temperature and vibration tolerance

Features

• High-Density Input: 32 channels allow compact I/O integration

• Rugged Design: Engineered for harsh industrial conditions

• Easy Installation: Standard terminal blocks for quick wiring

• Wide PLC Compatibility: Works with Experion LS, Allen-Bradley, Siemens, Rockwell, and other PLCs

• Reliable Isolation: Safe operation with channel-to-channel and system isolation

• Programmable Filters: Customizable input delay to reduce signal noise

Applications
Ideal for distributed control systems, factory automation, process control, and monitoring discrete field devices. Compatible with legacy and modern PLC environments.

FAQ

Q: How many input channels does TC-IDD321 provide?
A: 32 discrete channels organized into 2 isolated groups.

Q: What voltage range is supported?
A: 10–31.2 VDC with a nominal 24 VDC operation.

Q: Is this module compatible with other PLC systems?
A: Yes, it works with Experion LS, Allen-Bradley, Siemens, Rockwell, and other major PLCs.

Q: Does it include galvanic isolation?
A: Yes, channel-to-channel and user-to-system isolation is tested at 1500 VDC.