Overview
Manuals
Screw-Terminal Inputs
Feed Resistance
Signal Reference
Features:
- Sixteen HLAI or STI field circuits with fixed screw terminals.
- Size-B termination layout for the specified redundant processor pairing.
- Conformally coated MC construction with resistor-limited transmitter supply.
The Honeywell MC-TAIH52 field termination assembly accepts the wiring for sixteen high-level analog input or Smart Transmitter Interface circuits. Its nonremovable screw terminals distinguish it from the compression-terminal TAIH12 arrangement. Honeywell lists the size-B board for redundant service with the specified processor families. The MC ordering designation identifies the coated execution; the installed processor determines whether the connected instruments are used for conventional analog measurement or the documented smart-transmitter service.
For HLAI operation, the specification lists 0-5 V, 1-5 V and 0.4-2 V ranges, plus 4-20 mA through 250 ohms. The TAIH52 transmitter feed is limited by a 145-ohm resistor and is not individually fused. The common-mode limit and normal low-side common-jumper arrangement must be considered together. Its board footprint is 307.3 by 120.65 mm, excluding cable access and packaging. Preserve wire labels, redundant cable destinations and the complete 51304337-250 assembly identity during replacement.
The MC-TAIH52 51304337-250 Honeywell Coated Screw-Terminal Analog Input Assembly may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell MC-TAIH52 51304337-250 official technical documentation and product links.
This multi-page Honeywell technical document contains the exact model and its technical data. Apply the values to the supplied type number and verify its revision before installation.
The sixteen instrument circuits land on nonremovable screw terminals. This changes the field-wiring interface relative to a compression-terminal assembly, even where the processor family and channel count agree. Identify every conductor and restore the approved terminal assignment, shielding and processor cable destinations after replacement.
Honeywell specifies a 145-ohm resistor for transmitter-feed current limiting in this termination arrangement. This is not the enhanced-power current limiter used in another TAIH variant and it is not a fuse rating. Compare instrument supply requirements with the complete installed field circuit.
The HLAI common-mode range is -6 to +5 V peak from DC to 60 Hz. The manufacturer footnote also describes the low-side connection to system common through an FTA jumper. Preserve the engineered reference arrangement rather than changing it solely to obtain a plausible reading.
