Honeywell MC-TDIY22 51204160-175 | 120VAC Digital Input Field Termination Assembly

Product Description

The MC-TDIY22 (51204160-175) is a robust Digital Input Field Termination Assembly (FTA) specifically engineered for the Honeywell High-Performance Process Manager (HPM) and Experion PKS control environments. This module serves as a specialized electrical interface, allowing high-voltage 120VAC field signals to be safely monitored by the system's digital input processors. Designed for high-density industrial applications, the MC-TDIY22 provides essential signal conditioning and isolation, ensuring that discrete status data from field-mounted switches and contacts is accurately captured without risking damage to the sensitive controller backplane.

Technical Specifications

• Model Identification: MC-TDIY22

• Part Number: 51204160-175

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

• Input Voltage Capacity: 120 VAC (Nominal)

• Signal Type: Discrete / Digital ON/OFF States

• Architecture Support: Honeywell TDC 3000 / HPM / Experion PKS

• Redundancy Configuration: Supports dual I/O processor (IOP) connections

• Termination Interface: Compression-style screw terminals for field leads

• Coating: Conformal coated (MC designation) for corrosion resistance

• Physical Profile: Standard Honeywell Size B FTA (~12 inches / 307 mm)

• Compliance Standards: Industrial safety and EMI/RFI shielding

Operational Utility and Safety

In heavy industrial sectors such as power generation and water treatment, the MC-TDIY22 (51204160-175) is the standard solution for integrating 120VAC field hardware. Its "MC" prefix signifies that the printed circuit board is protected by a conformal coating, providing a critical barrier against humidity, dust, and corrosive gases. The assembly is built to handle the inherent electrical noise associated with high-voltage AC circuits, utilizing internal filtering to prevent false triggering. For mission-critical control loops, the module's support for redundant I/O processors ensures that process visibility is maintained even during a hardware swap or processor failover.

Frequently Asked Questions

• Can this FTA be used with 24VDC field signals?

  No. The MC-TDIY22 (51204160-175) is specifically optimized for 120VAC sensing. For 24VDC logic, a DC-rated FTA such as the MC-TDID series should be utilized to ensure proper switching thresholds.

• Is the 51204160-175 part number interchangeable with the MC-TDIY22?

  Yes. 51204160-175 is the official Honeywell manufacturing part number for the MC-TDIY22 assembly. They are functionally identical and fully compatible within the HPM/Experion I/O Link ecosystem.