Honeywell MC-TDOR12 51309148-175 Digital Relay Output Field Termination Assembly (FTA)

Product Overview

The Honeywell MC-TDOR12 (Part Number: 51309148-175) functions as a high-capacity Digital Relay Output Field Termination Assembly (FTA) within the Honeywell DCS architecture. This module provides the critical interface between low-level system logic and high-power field devices, commandingly switching up to 16 independent electromechanical relay channels. We supply this assembly in 100% Brand New and Original factory condition, ensuring your facility utilizes pristine hardware for mission-critical switching of valves, motors, and alarm systems.

Technical Specifications

Engineering Advantages

• High-Power Switching Versatility: The MC-TDOR12 handles both 120 VAC and 125 VDC loads. This dual-voltage capability allows the DCS to control a wide variety of industrial actuators and solenoids directly from the FTA without requiring external interposing relays.

• Rapid Logic Execution: Internal electromechanical components achieve a response time of less than 10 milliseconds. This high-speed switching ensures that safety interlocks and process sequences activate with minimal latency, protecting downstream equipment.

• Integrated Circuit Protection: Every channel features built-in surge and short-circuit protection. This shielding prevents field-side electrical faults from propagating back to the sensitive I/O processors, isolating the central control system from catastrophic damage.

• Secure, Vibration-Resistant Wiring: Compression terminals provide high-torque retention for field wiring. This mechanical design eliminates the risk of wire pull-out or intermittent contact issues common in high-vibration environments like power generation or compressor stations.

• Standardized Footprint: The "Size B" (12-inch) form factor ensures a perfect fit into standard Honeywell chassis. This standardized sizing allows for rapid field replacement and simplifies cabinet layout planning during system expansions or retrofits.

FAQs

• Can the MC-TDOR12 handle inductive loads directly?

  Yes. The electromechanical relays on this FTA switch inductive loads up to the specified voltage ratings. However, for extremely high-cycle applications, we recommend checking the surge suppression requirements of your specific field device to maximize the relay's service life.

• What is the primary difference between this and a standard digital output module?

  Standard digital output modules often provide low-current 24VDC signals. The MC-TDOR12 uses physical relay contacts to switch much higher voltages (120VAC/125VDC), providing true dry-contact isolation and higher current-carrying capacity.

• Does this unit arrive in original Honeywell factory packaging?

  Absolutely. We guarantee that every 51309148-175 is 100% Brand New. It ships in its original factory-sealed box with all serial numbers and manufacturer labels intact to ensure authenticity.

• Is there a redundant version of this relay FTA?

  The MC-TDOR12 is a non-redundant assembly. If your process requires full redundancy for the relay outputs, you must implement the appropriate redundant pair architecture as specified in the Honeywell TDC 3000 / Experion hardware manual.