Product Identity
| Attribute | Value |
|---|---|
| Model number | 8C-TAOXB1 |
| Order / part number | 51307137-175 |
| Product family | Honeywell Experion PKS — Series C I/O (Series 8) |
| Hardware type | Analog Output IOTA (field termination base) |
| Configuration | Redundant analog output IOTA |
| Companion electronics module | CC-TAOX11 (order 51308353-175) or 8C-PAOHA1 / 8C-PAON01, depending on cabinet architecture |
| Signal supported | 4–20 mA DC analog output to final elements |
| Host controller | Honeywell C300 Controller (Series C I/O Link) |
| Naming convention | “8C” = Series 8 / Series C I/O family · “T” = Termination (IOTA/base) · “AO” = Analog Output · “B” = redundant/alternate base variant · “1” = revision |
The IOTA vs. the Electronics Module — a Key Distinction
In Honeywell’s Series C architecture, an analog output loop is physically split across two pieces of hardware, and confusing them is the most common sourcing error:
- The IOTA (base) — a passive termination assembly that screws or DIN-mounts in the cabinet and provides the field-wiring terminals, bus connectors, and the mechanical socket. It carries no output electronics. This is what the 8C-TAOXB1 is.
- The electronics module — the active card that converts the C300’s digital output value into a 4–20 mA signal, and which slides onto the IOTA. In the CC- prefix family this is the CC-TAOX11 (51308353-175); in the 8C- prefix family it is the 8C-PAOHA1 (with HART) or 8C-PAON01 (without HART).
