MC-TAIH52 Redundant High Level Analog Input Termination Assembly | Honeywell

The Honeywell MC-TAIH52, also cataloged as the MC-TAIH52 Redundant High Level Analog Input Termination Assembly, operates as a dedicated hardware component for dual-redundant analog signal conditioning and distribution within Honeywell TDC 3000 and Experion PKS High Performance Process Manager (HPPM) platforms.

Hardware Specifications

Channel Isolation & Fieldbus Signal Routing

The MC-TAIH52 provides dual-path signal routing for up to 16 high-level analog inputs, allowing concurrent interfacing with redundant High Level Analog Input (HLAI) processor cards. Designed to support 4-20 mA HART loop protocol transmitters and 1-5 VDC field signals, the assembly incorporates passive signal-splitting circuitry and channel-to-channel isolation. This ensures that a component failure or physical disconnection on a single I/O processor channel does not disrupt signal continuity or introduce loop impedance shifts on the primary control path.

Frequently Asked Questions

Q: How does the MC-TAIH52 handle redundancy between primary and backup analog input processors?

A: The board features dual cable connections that route incoming field loop currents across precision parallel sampling resistors, delivering identical voltage signals simultaneously to both primary and secondary HLAI modules.

Q: Can individual field wiring terminals be disconnected without removing the entire assembly?

A: Yes, field connections are terminated via screw compression terminal blocks, allowing field loop wiring to be isolated independently during troubleshooting without interrupting adjacent channels.

Q: Does the MC-TAIH52 require external power to execute signal routing?

A: No active onboard power conversion is required for basic passive scaling; 24 VDC transmitter loop power is distributed directly from the system power bus through fused branch circuits on the board.

Field Installation Guidelines

1. Disconnect transmitter loop power and isolate backplane interface cables before installing or replacing the MC-TAIH52 assembly on the DIN rail or mounting plate.
2. Ensure field input cables use individually shielded twisted pairs to maintain signal integrity across high-density analog loop runs.
3. Connect signal cable shields directly to the cabinet ground bus at a single point to prevent ground potential loops from distorting measurement readings.
4. Verify that both redundant interface cables are fully seated and locked with retention latches to guarantee continuous dual-processor communications.