Honeywell CC-TAOX11 Analog Output IOTA 51308353-175

Honeywell CC-TAOX11 Analog Output IOTA (51308353-175)

The Honeywell CC-TAOX11 is a redundant analog output input/output termination assembly (IOTA) made for the Experion PKS Series C control system. The 51308353-175 model is designed for mission-critical industrial use and has a strong interface for sixteen 4–20 mA current loops. This makes it easy to control actuators, valves, and other important field equipment.

The CC-TAOX11 (MPN: 51308353-175) is a key part of the Honeywell Series C I/O family and was made to be redundant. This 12-inch IOTA can hold two analog output modules in a 1:1 pairing, which is different from its non-redundant version (CC-TAOX01). This design stops one point of failure from stopping the plant’s operations.

The assembly comes with a G3 conformal coating as standard, which makes it very resistant to harsh, corrosive conditions that contain H₂S or chlorine. Its vertical wiring architecture and removable terminal blocks make it easy to install and maintain. You may “hot-swap” modules without having to separate the field wiring.

Technical Specifications

Industry Applications

• Refinery and petrochemical: exact management of important flare valves and pressure-reducing systems.
• Power Generation: Backup analog feedback for steam turbine governors for controlling the flow of fuel.
• Chemical Processing: Controlling feed rates for reactive chemicals while losing a signal is not an option.
• Offshore Platforms: Subsea valves and safety actuators work well in salt-air situations.

Tips from an Expert Engineer

1. Check the polarity of the wiring before you turn on the power. The CC-TAOX11 features surge protection; however, if the reverse polarity is on for too long and goes beyond 500 mAdc, it can harm the protective diodes.
2. Load Optimization: To get the most reliable 4–20 mA signal, make sure the entire loop resistance (including field wiring) is between 250 Ω and 600 Ω. It can tolerate 800 Ω, but remaining in the “sweet spot” keeps the IOTA from getting too hot.
3. Redundancy Staging: You can save money by installing the CC-TAOX11 with just one module at first. The system will run in non-redundant mode, and you can add the second module later for “bumpless” redundancy without turning off the loop.