MU-TAOX12 | Honeywell 8-Channel Analog Output Field Termination Assembly (FTA)

Technical Product Overview

The MU-TAOX12 serves as a specialized 8-point Analog Output Field Termination Assembly (FTA) within the Honeywell TDC 3000 and Experion PKS ecosystems. Engineered for high-precision current loop control, this module converts digital commands into stable 4-20mA signals to drive actuators, valves, and positioners.

A critical engineering advantage of the MU-TAOX12 is its elevated field terminal voltage overhead. Compared to standard assemblies like the MU-GAIH13 or MU-GAIH83, this model provides increased drive capability, effectively overcoming higher impedance in extended field wiring runs without compromising signal integrity.

Detailed Engineering Specifications

• Signal Architecture: 8-Channel isolated current output (typically 4-20mA)

• Digital Resolution: 12-bit D/A conversion for granular control

• Calibration Accuracy: ±0.1% of full-scale range at reference conditions

• Input Power Requirement: Nominal 24 VDC

• Environmental Range: Rated for operation from -40°C to +70°C (-40°F to 158°F)

• Drive Capacity: Enhanced voltage rails to support long-distance cable loops

• Reliability Features: Supports redundant processor configurations for mission-critical loops

• Form Factor: Approximately 14.5 x 10.5 x 3.5 inches

• Physical Mass: 2.2 lbs (1.0 kg)

• Installation Standards: Designed for Rittal cabinet mounting using Honeywell-certified hardware

Installation and Hardware Compliance

To maintain the thermal and electromagnetic certification of the MU-TAOX12, the assembly must be housed within a standard Rittal enclosure. Integration requires the use of official Honeywell/Rittal mounting brackets and standoffs. Adhering to these structural requirements ensures the ±0.1% accuracy is maintained even in high-vibration or variable-temperature industrial environments.

Functional Comparison: MU-TAOX12 vs. MU-GAIH13

While both units handle analog signals, the MU-TAOX12 is specifically optimized for output drive. The primary differentiator is the "Field Terminal Voltage." The MU-TAOX12 allows for significantly longer wiring distances between the DCS cabinet and the field device, as it can source higher voltage to push the 20mA signal through increased loop resistance.

Frequently Asked Questions

Does the MU-TAOX12 support redundancy?

Yes. The MU-TAOX12 can be configured in a redundant architecture to ensure that a processor failure does not result in the loss of control over the analog output loops.

Can this unit be used with non-Honeywell mounting hardware?

Honeywell documentation strictly specifies standard Rittal mounting hardware to ensure proper grounding and physical support. Using third-party hardware may void the mechanical warranty.