MC-TDID72 51303928-150 | Honeywell 72-Channel Digital Input FTA Module

Product Description

The MC-TDID72 (51303928-150) is a high-density Digital Input Field Termination Assembly (FTA) engineered for large-scale Honeywell Experion PKS and legacy TDC 3000 control systems. This professional-grade interface facilitates the centralized acquisition of up to 72 independent discrete signals, acting as the critical link between field-side hardware and the system’s Input/Output Processors (IOP). Designed for industrial-scale monitoring, the MC-TDID72 is optimized for high-availability environments, featuring a conformal-coated PCB that provides superior resistance to moisture, dust, and corrosive atmospheric contaminants commonly found in refineries and chemical processing plants.

Technical Specifications

• Model Identification: MC-TDID72

• Part Number: 51303928-150

• Functional Category: Digital Input Field Termination Assembly (FTA)

• Channel Density: 72 Independent Discrete Input Channels

• Input Voltage Compatibility: 24 VDC Nominal (Supports dry contact and powered inputs)

• Signal Processing: Discrete ON/OFF State Acquisition

• System Interface: Compatible with Honeywell MU/MC series Digital Input IOPs

• Redundancy Support: Dual-cable ports for redundant processor configurations

• Diagnostic Interface: Integrated LED status indicators per channel

• Wiring Method: High-retention compression-style screw terminals

• Environmental Protection: Full Conformal Coating (MC Designation)

• Operating Temperature: -40°C to +70°C

• Physical Form Factor: Standard Honeywell Size B FTA (~307 mm)

High-Density Monitoring and Diagnostics

The MC-TDID72 (51303928-150) is a versatile solution for facilities requiring extensive monitoring of limit switches, pushbuttons, motor starter contacts, and alarm signals. Its 72-channel architecture significantly reduces the physical footprint within the I/O cabinet compared to lower-density modules. For maintenance personnel, the integrated LED array provides instantaneous visual verification of field states, streamlining the commissioning and troubleshooting of complex control loops. Furthermore, the module's 24VDC logic is designed with robust isolation to maintain signal integrity in high-EMI environments.

Frequently Asked Questions

• Can this FTA be used with 120VAC field signals?

  No. The MC-TDID72 (51303928-150) is specifically designed for 24VDC logic. Interfacing 120VAC signals directly will cause immediate hardware failure. An interposing relay or an AC-specific FTA must be used for higher voltage signals.

• Does the "MC" prefix signify a specific hardware version?

  Yes. In the Honeywell ecosystem, the "MC" prefix indicates that the board is conformal coated for harsh environments, whereas the "MU" prefix generally denotes a standard, non-coated version of the same functional board.