Description

The Honeywell 8C-TAIXA1 (Part Number 51307125-175) is a non-redundant Analog Input I/O Termination Assembly (IOTA) within the Experion PKS Series 8 C300 control system platform. Designed for compact panel layouts, this 6-inch termination assembly provides physical field wiring connection terminals and mounting carrier infrastructure for 16-channel analog input modules, specifically supporting HART-enabled analog input modules such as the 8C-PAIHA1.

The Honeywell 8C-TAIXA1 51307125-175 interfaces 4-20 mA current loops from 2-wire loop-powered or 4-wire self-powered transmitters directly into the C300 controller architecture. It features factory conformal coating to shield physical traces, terminal blocks, and passive components from industrial airborne contaminants, corrosive gases, and humidity.

Serving as the physical mounting foundation, the non-redundant IOTA assembly allows field wiring to remain permanently attached to screw terminals while facilitating seamless I/O Module Removal and Insertion Under Power (RIUP). This architecture minimizes downtime during maintenance and streamlines cabinet field wiring.

Features

• Compact Form Factor: Measures 6 inches in width, saving space on panel DIN rails while providing termination points for up to 16 analog input channels.
• Factory Conformal Coating: Conformal coating protects trace layouts, solder joints, and terminal interconnections against aggressive chemical environments and humidity.
• Single-Module IOTA Carrier: Built for non-redundant control configurations, accommodating a single 16-channel Series 8 Analog Input module.
• Direct Field Transmitter Interface: Connects 4-20 mA DC signals from 2-wire loop-powered and self-powered process instrumentation.
• Online Maintenance Support: Enables Module Removal and Insertion Under Power (RIUP) without disconnecting field wiring or interrupting power to adjacent assemblies.
• Integral Bus Interconnects: Provides internal routing for 24 VDC system distribution and high-speed communication buses to the C300 execution environment.

Applications

• Experion PKS Series 8 Cabinet Integration: Serves as the physical termination base for non-redundant 16-channel analog input modules.
• Process Instrumentation Wiring: Terminates field signals from pressure transmitters, temperature transmitters, flowmeters, and level sensors.
• Hazardous & Corrosive Plant Enclosures: Deployed in process environments requiring conformal coated termination hardware to withstand harsh atmospheric conditions.
• Continuous Control Strategies: Relays high-density analog loop measurements directly to C300 controllers for real-time monitoring and process logic.

Technical Specifications

General

Electrical & Signal Properties

Physical & Mechanical

Connections / Interfaces

Installation Guidelines

1. Ensure panel DC power supplies are isolated before mounting or wiring the IOTA assembly.
2. Secure the 8C-TAIXA1 6-inch termination assembly onto standard panel enclosure DIN rail structures using appropriate end stops.
3. Wire field transmitters to designated channel terminals according to 2-wire or self-powered device wiring diagrams.
4. Verify field wiring polarity and ensure proper grounding/shielding practices are implemented across signal lines.
5. Align the corresponding Series 8 I/O module (e.g., 8C-PAIHA1) with the socket headers on the 8C-TAIXA1 assembly.
6. Press the module firmly into place until retaining mechanical latches click into place.
7. Apply 24 VDC system power and verify power and channel status indicators on the mounted module.

Configuration / Commissioning / Replacement Guidelines

Configuration Guidelines

• Assign physical channel numbers in Honeywell Control Builder to match the field terminal assignments on the 8C-TAIXA1 assembly.
• Select correct input channel modes (4-20 mA current loop settings) within the Experion software environment.

Commissioning Recommendations

• Perform loop checks by verifying current signals at the 8C-TAIXA1 field terminal screws with a calibrated process calibrator prior to system sign-off.
• Ensure all field signal shield lines are ground-terminated at the dedicated cabinet ground bar and isolated from the IOTA base.

Replacement Recommendations

• Module Removal and Insertion Under Power (RIUP) allows replacing the mounted I/O module without removing field wires from the 8C-TAIXA1 assembly.
• If replacing the 8C-TAIXA1 termination base itself, turn off 24 VDC field power, disconnect field signal terminals, unlatch the mounted I/O module, and unmount the base from the DIN rail.