Overview
Manuals
Exact IOP Mapping
LLMux Component Roles
Service Boundary
Features:
- Honeywell table 12-1 maps MU-PLAM02 directly to 51304362-100.
- The manufacturer identifies the model as the LLMux I/O processor.
- The source distinguishes non-coated MU hardware from coated MC-PLAM02 and separately identifies the power adapter and FTAs.
Honeywell HPM Planning identifies MU-PLAM02 51304362-100 as the Low Level Analog Input Multiplexer IOP. Table 12-1 lists the surrounding LLMux assemblies separately: RTD and thermocouple field termination assemblies, a power adapter, and a coated MC-PLAM02 IOP with a different order number. The same planning manual places 51304362-100 in the CE-compliant IOP parts table. These entries establish the processor's exact catalog identity, but they do not imply that its IOP card itself provides field terminals, sensor cold-junction compensation or power-adapter function.
The manufacturer describes a CE LLMux arrangement in which the IOP connects through a MU-TLPA02 adapter and specified cable to approved FTA hardware. It expressly says LLMux assemblies are compatible only with each other, not with the RHMUX assemblies in another section. Before a controlled change, record the installed IOP label, revision, cabinet slot, adapter, FTA, cable and configured sensor assignments. Follow site isolation and Honeywell maintenance procedures, then verify the connected measurement channels and diagnostics through the actual RTD or thermocouple field hardware. Historical catalog identification is not a current interchangeability or inventory guarantee.
The MU-PLAM02 51304362-100 Honeywell HPM Low-Level Multiplexer IOP may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell MU-PLAM02 51304362-100 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.
Honeywell table 12-1 names MU-PLAM02 as an LLMux IOP and prints part number 51304362-100. Table 7-2 independently places the same mapping in the CE-compliant IOP column. These two rows support the complete website identity, but do not verify an offered item's revision or condition. Check the physical label and current plant spare record before accepting it as the installed processor's replacement.
The MU-PLAM02 processor is one component of the LLMux configuration. Honeywell separately lists RTD and thermocouple FTAs and the MU-TLPA02 power adapter, with cabling between the IOP and field side. Do not attribute sensor terminals or adapter characteristics to the processor itself. The planning manual specifically says LLMux assemblies are not compatible with RHMUX assemblies, so a broadly similar low-level input name cannot justify interchangeability.
For planned maintenance, document the IOP position, firmware or hardware revision, configured channels, FTA designation, adapter execution, cable and baseline diagnostics. Match the plant's CE approval and the uncoated MU versus coated MC execution. Use authorized isolation and current manufacturer procedures, then prove each affected input through its actual field assembly after installation. Do not infer sensor accuracy or total point count from the model designation alone.
