2. Model Definition

51204170: Base part number for 16-channel HLAI/STI enhanced power FTA

-100: Standard uncoated PCB hardware revision, non-CE certified

Matched IOP Card: MC-TAIH22 (16-point High Level Analog Input HLAI module) and STI smart transmitter interface cards

Equivalent Yamatake part number: 80366195-100

Not interchangeable with DI, DO, AO, or low-level AI FTA series

3. Technical Specifications

Channel Count: 16 independent analog input channels

Supported Signals: 4–20mA 2-wire transmitters, HART protocol smart transmitters

Loop Excitation: 24VDC enhanced stabilized loop power supplied by cabinet system power

Terminal Style: Compression screw terminals, accepts wire up to 14 AWG (1.6 mm²)

PCB Coating: No conformal coating; flammability rating UL94 V0

Form Factor: Size B, 307 mm (12.1 in) standard dimension

Mounting: Snap-on installation for 35 mm standard DIN rail

Operating Temperature: 0 ℃ ~ +60 ℃ (indoor control cabinet environment only)

Circuit Design: Passive layout with built-in RC EMI filters and per-channel short-circuit current limiting protection

Redundancy: Fully compatible with redundant dual MC-TAIH22 IOP configurations

Approximate Weight: ~0.33 kg

4. Interface & Communication Configuration

Inner IOP Connection: Dedicated flat ribbon cable connector directly mates with MC-TAIH22 IOP card. No onboard communication chip; measurement data transmits over the UCN control bus via the paired IOP module.

Outer Field Terminals: Polarity-marked positive/negative terminal blocks for each transmitter loop, organized for orderly instrument cabling.

Power Supply: 24VDC cabinet system power provides stable excitation current to each field transmitter loop via the enhanced power circuit.

5. Core Functions

Cable strain relief protects fragile pin headers on MC-TAIH22 IOP cards from physical damage caused by heavy instrument cable tension.

Onboard RC EMI filters suppress electrical noise from motors, VFDs, and contactors to stabilize pressure, flow, level, and temperature measurement values.

Independent per-channel current limiting isolates short-circuit faults to a single loop, preventing total IOP card failure.

Enhanced power circuitry delivers consistent loop voltage for long-distance field transmitter wiring runs.

Native redundant architecture supports hot-swappable dual IOP setups for uninterrupted process operation.

Full HART compatibility enables digital configuration, diagnostics, and parameter reading alongside standard 4–20mA analog signals.

6. Application Scenarios

Process industries with Honeywell Experion PKS UCN/C300 DCS: petrochemical, chemical, thermal power, oil & gas, pulp & paper, metallurgy, water treatment.

Measurement loops utilizing 4–20mA/HART two-wire smart transmitters for pressure, flow, liquid level, and temperature monitoring.

Standard matched terminal assembly for 16-point high-level analog input slots in DCS I/O cabinets.

7. Operation & Maintenance Instructions

Matching Restriction: Only compatible with MC-TAIH22 HLAI and STI IOP modules; cannot replace digital I/O, AO, or low-level analog FTA units.

Wiring Standards: Strictly follow terminal polarity markings; use shielded instrument cable with single-point shield grounding at the cabinet to minimize signal interference.

Spare Part Interchangeability: 51204170-100, 51204170-125, and 51204170-150 have identical electrical performance for emergency field replacement; select the same suffix for long-term stable deployment.

Fault Troubleshooting Workflow: No measured reading → Retighten compression terminal screws → Test transmitter loop current → Inspect ribbon cable seating → Diagnose paired MC-TAIH22 IOP card status.