Product Overview

The Honeywell MC-TAOX12, part number 51304335-175, is a specialized Field Termination Assembly (FTA) engineered for the Universal Control Network (UCN) within legacy TDC 3000 and Experion PKS environments. This module acts as the ruggedized physical interface between field-level discrete sensors and the high-level High-Performance Process Manager (HPM). Designed to facilitate the secure termination of 16 individual digital input channels, the MC-TAOX12 translates binary field signals into the system-level data required for complex control logic. Although officially discontinued by the manufacturer in late 2018, it remains a critical infrastructure component for plants maintaining established DCS architectures that require genuine, high-reliability termination hardware.

Hardware Architecture and Interface Benchmarks

The MC-TAOX12 is built with industrial-grade interconnects and robust electrical shielding to prevent signal degradation in high-interference plant environments.

• Input Capacity 16 Discrete Digital Input Channels

• System Series Honeywell UCN / HPM / TDC 3000

• Signal Integrity Integrated noise filtering and surge protection per channel

• Physical Connectivity High-density screw terminal blocks for secure field wiring

• Operating Voltage Supports standard industrial 24VDC logic levels

• Chassis Build Hardened PCB with temperature-resistant components for cabinet mounting

• Net Weight 0.48 kg

• Physical Scale 12 cm x 8.5 cm x 30.7 cm

• Production Origin USA

• Customs Code HS 8537101190

Critical Field Deployments and Utility

This Field Termination Assembly is essential for maintaining the operational continuity of large-scale automated processes where discrete signal accuracy is non-negotiable.

• Status Feedback Aggregation Consolidating signals from limit switches, proximity sensors, and auxiliary motor contacts into the HPM controller.

• Safety Interlock Monitoring Providing the primary termination point for emergency stop buttons and safety gate sensors in industrial manufacturing zones.

• Process Sequence Control Capturing valve position feedback (open/closed) across expansive chemical and refinery manifold systems.

• Legacy System Extension Serving as a brand-new replacement for aging or damaged FTA boards to restore 16-channel input capacity without requiring a full system migration.

• Remote I/O Hardening Utilizing the robust construction of the MC-TAOX12 to ensure reliable discrete signal acquisition in environments subject to vibration and thermal cycling.