Overview
Manuals
Redundant Loops
Transfer Timing
Valve Interface
Features:
- Terminates eight analog output circuits for the PAOX03 architecture.
- Supports the specified redundant size-B termination arrangement.
- Coated MC construction with compression field terminals.
The MC-TAOX12 51304335-175 listing is an MC coated eight-circuit analog output field termination assembly for the PAOX03 processor architecture. Honeywell identifies TAOX12 as the size-B arrangement used for redundancy, with compression terminals and a phone-connector-style processor connection. The normal system output is 4-20 mA; the specified maximum resistive load is 750 ohms at 22 mA. These are ratings of the processor and termination combination, not independent output generation by the board.
For replacement planning, the documented board footprint is 307.3 mm long by 120.65 mm wide. Honeywell specifies output perturbation of 1 ms nominal and 4 ms maximum during a swap, and 30 ms nominal and 125 ms maximum during failover, with switching-hardware diagnostics once per minute. The MC version is identified as coated in the ordering table; the numeric 51304335-175 assembly suffix is retained from the existing catalog and is not independently decoded by that family table. Preserve the installed output loops and redundant processor paths during service.
The MC-TAOX12 51304335-175 Honeywell Coated Redundant Analog Output Termination may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell MC-TAOX12 51304335-175 documentation and reference links.
Important Notice: The excerpt retains the original Honeywell IO03-500 cover, relevant model and electrical tables, and dimensional footnotes. It is a historical specification, not a current lifecycle notice. Confirm the complete assembly label and installed processor.
The eight field circuits belong to the PAOX03 analog output system. TAOX12 supports the documented redundant arrangement and is not the compact TAOX02 layout. Check both processor paths, the installed FTA cables and every loop assignment before replacing or reconfiguring the board.
The published transfer figures distinguish a processor swap from failover: swap perturbation is 1 ms nominal and 4 ms maximum, while failover perturbation is 30 ms nominal and 125 ms maximum. Review the receiving device response and configured control strategy before relying on those limits.
Compression field terminals and the phone-style processor connector must match the installed wiring. Record polarity, shielding and cable destinations, and allow access around the size-B board. The numeric assembly marking must be compared directly with the supplied item rather than treated as a documented revision code.
