Honeywell MC-TAOX12 51304441-175 Analog Output FTA

The Honeywell 51304441-175, also cataloged as the MC-TAOX12 Analog Output Field Termination Assembly (FTA), operates as a dedicated hardware component for multi-channel process signal distribution within Honeywell HPM, TDC 3000, and Experion PKS platforms. Configured for driving 16 independent 4-20 mA current loops, the assembly routes analog control commands from redundant I/O processors to field actuators, control valves, and I/P transducers. The hardware utilizes multi-layer PCB construction with protective coating and compression-style screw terminals to maintain analog signal fidelity across extended field cable runs.

Hardware Specifications

4-20 mA HART Loop Protocol & Redundant Processor Interfacing

The Honeywell MC-TAOX12 51304441-175 incorporates dual-path signal routing architecture to interface directly with primary and secondary I/O processors. During processor failover, the board maintains seamless 4-20 mA current output delivery without signal dropping or transient spikes. The precision resistive networks integrated into each of the 16 channels ensure signal accuracy for 4-20 mA HART loop protocol field devices while isolating controller backplane logic from field-induced electrical noise.

Frequently Asked Questions

Q: How does the MC-TAOX12 handle processor redundancy during a failover event?

A: The FTA features dual-connector headers that interface simultaneously with primary and backup I/O processors, allowing passive hardware switching of the 4-20 mA command signal without interrupting loop power or signal continuity.

Q: What type of wiring connection is supported on the field side of the 51304441-175 assembly?

A: The board is equipped with heavy-duty compression-style screw terminals designed to accept stranded or solid copper field wiring directly for all 16 analog channels.

Q: Can the MC-TAOX12 FTA be powered directly from an external 24 VDC source?

A: Yes, nominal 24 VDC supply voltage can be supplied either through the primary I/O link interface cable or via dedicated external 24 VDC power distribution terminals.

Field Installation Guidelines

1. De-energize all 24 VDC power sources and disconnect field load wiring before installing or replacing the FTA board in the enclosure rack.
2. Secure the 6-inch assembly onto the cabinet mounting channel, ensuring metallic grounding clips make firm, low-resistance contact with the chassis earth rail.
3. Attach the dual I/O interface cables from the main and redundant High-Performance Process Manager (HPM) or Experion I/O card racks to the FTA headers.
4. Strip field conductor insulation to the recommended length and secure wires into the compression screw terminals, observing correct positive and negative loop polarity per channel.
5. Ensure overall cable shielding is grounded at a single designated cabinet earth point to prevent ground loop currents from interfering with 4-20 mA analog outputs.