Honeywell MC-GOAX02 51304638-175 Galvanically Isolated Analog Output FTA

Product Description

The MC-GOAX02 (51304638-175) is a high-performance Galvanically Isolated Analog Output Field Termination Assembly (FTA) specifically engineered for Honeywell Experion PKS and legacy TDC 3000 Distributed Control Systems. This 16-channel interface provides a critical safety and signal conditioning barrier between the system's Analog Output (AO) processors and field-side actuators or valves. By utilizing galvanic isolation, the MC-GOAX02 effectively eliminates ground loops and protects sensitive controller circuitry from high-voltage transients and electromagnetic interference (EMI). The "MC" designation confirms that the assembly is conformal coated, ensuring long-term reliability in corrosive or humid industrial environments.

Technical Specifications

• Model Identification: MC-GOAX02

• Part Number: 51304638-175

• Functional Category: Galvanically Isolated Analog Output FTA

• Channel Density: 16 Independent Channels

• Signal Support: 4–20 mA DC Output

• Isolation Method: Galvanic (System-to-Field and Channel-to-Channel)

• Architecture Support: Honeywell HPM, TDC 3000, and Experion PKS

• Redundancy Support: Compatible with redundant I/O processor configurations

• Connection Interface: Compression-style screw terminals for secure field leads

• Environmental Protection: Full Conformal Coating for harsh environments

• Compliance Standards: CE and RoHS compliant

• Physical Profile: Size B Assembly (~12 inches / 307 mm)

• Operating Temperature: -40°C to +70°C

Signal Integrity and Field Safety

The MC-GOAX02 (51304638-175) is an essential component for facilities that prioritize process uptime and hardware protection, such as refineries, offshore platforms, and chemical plants. Its galvanic isolation barrier ensures that an electrical fault at a specific valve or actuator does not propagate back to the central processor or affect adjacent channels. Furthermore, its support for redundant I/O processors ensures that the 4–20 mA control signal remains stable and active even during a primary hardware failover or I/O Link cable maintenance.

Frequently Asked Questions

• What is the primary benefit of the MC-GOAX02 over non-isolated FTAs?

  The MC-GOAX02 provides a physical isolation barrier for every channel. This prevents ground loop noise from distorting output signals and ensures that field-side surges do not damage the expensive I/O modules in the control rack.

• Is this module suitable for use in corrosive environments?

  Yes. The MC-GOAX02 (51304638-175) is manufactured with a conformal coating on the PCB, providing high-level resistance to salt spray, humidity, and chemical vapors typical in industrial settings.