Description

MC‑TAIH52 High‑Level Analog Input FTA

Technical Specifications

• Product Model: MC‑TAIH52 (51304337‑250)
• Brand: Honeywell
• Warranty: One Year
• Input Voltage: 24 VDC transmitter excitation; 5 VDC backplane logic power
• Operating Temperature: 0 °C to +60 °C
• Storage Temperature: -40 °C to +85 °C
• Response Time: Matches DCS I/O scan cycle, <12 ms
• Protection Class: IP00 (cabinet‑mount open‑frame termination assembly)
• Accuracy Class: ±0.1 % full‑scale signal conditioning for high‑level analog signals
• Output Frequency: Not applicable (signal termination hardware)
• Rated Current Range: 22 mA max per channel for 2‑wire transmitter supply
• Communication Interface: Screw‑type field terminals; dual high‑density STI connectors for redundant I/O processor cards
• Supported Protocols: Honeywell STI internal DCS backplane bus
• Overload Capacity: Channel‑wise transient‑voltage suppression; field‑to‑logic galvanic isolation; short‑circuit input protection
• Dimensions: 151 mm × 137 mm × 51 mm

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Product Overview

The MC‑TAIH52 is a 16‑channel high‑level analog‑input field‑termination assembly built for Honeywell TDC3000 / Experion DCS platforms. It interfaces 4‑20 mA current and 0‑10 V voltage field transmitters to redundant STI‑series analog‑input processor cards, providing regulated 24 VDC loop power for two‑wire process transmitters. On‑board RC filtering suppresses high‑frequency electrical noise induced by plant cabinet environments, preserving signal integrity for temperature, pressure and flow‑variable measurements.

This FTA addresses key DCS deployment challenges: dual‑redundant signal routing for high‑availability process loops, consolidated field‑wiring termination for 16 analog points, and fault containment to prevent field‑side faults from damaging upstream processing hardware. Differential input circuitry delivers strong common‑mode noise rejection for long instrument‑cable runs. Process‑plant control engineers, DCS‑retrofit integrators and site‑maintenance technicians benefit most. It accepts drop‑in spare‑part replacement, eliminates custom‑built termination‑panel fabrication, and supports simplex and fully redundant DCS architectures for petrochemical, power‑generation and pulp‑and‑paper process‑control workflows. (

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Key Application Notes

• Requires pairing with Honeywell STI‑type analog‑input processor cards; no standalone signal‑to‑digital conversion capability
• Supports both 2‑wire loop‑powered transmitters and external‑powered 4‑20 mA / voltage‑mode field devices
• Dual STI connectors allow one FTA to feed signals to two redundant I/O cards for bumpless‑switchover configurations
• Conformal‑coated PCB variant available for cabinets with high humidity and airborne‑contaminant exposure
• All field wiring terminates to rear‑facing screw terminal blocks; no front‑panel field‑connection points
• Designed for safe‑area control‑room cabinet‑only installation; field hazardous‑area wiring must comply with applicable installation standards