Product Details
The Honeywell 51304335-175, also cataloged as the MC-TAOX12 Analog Output Field Termination Assembly, operates as a dedicated hardware component for 8-channel analog signal termination and field loop routing within Honeywell Universal Control Network (UCN) platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 51304335-175 |
| Brand | Honeywell |
| Origin | USA |
| Weight | Approx. 0.45 kg |
| Dimensions | Standard Honeywell FTA mounting card footprint |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | Max. 2.5 W at 24 VDC |
| Alternate Part Number | MC-TAOX12 |
| Number of Channels | 8 analog output channels |
| Signal Range | 0-20 mA or 4-20 mA |
| Maximum Load Resistance | 250 ohm |
| Communication Interface | Modbus RTU |
| Hazardous Location Approval | Class I, Division 2, Group D |
| MTBF | > 50,000 hours |
4-20 mA HART Loop Protocol and Channel-to-Channel Isolation
The field termination assembly incorporates galvanically isolated current drivers and internal filtering circuits to enforce channel-to-channel isolation across all 8 analog output lines. By maintaining high dielectric isolation between field loops and internal system buses, the board suppresses ground potential shifts and prevents electrical noise crosstalk from degrading signal precision on active 4-20 mA HART loop protocol instruments or 0-20 mA control loops.
Frequently Asked Questions
Q: What is the maximum load resistance supported per current loop on the 51304335-175?
A: Each of the 8 output channels supports a maximum loop load resistance of 250 ohm when operating within the standard 0-20 mA or 4-20 mA output ranges.
Q: How is the 51304335-175 grounded in a Class I, Division 2 hazardous area installation?
A: Frame grounding is established via dedicated chassis mounting screws, and field cable shields must be grounded at one point on the FTA ground bar to satisfy Class I, Division 2 requirements.
Q: Can the 51304335-175 assembly be installed in redundant UCN I/O configurations?
A: Yes, the board layout is designed for dual-redundant cable connection to redundant Analog Output I/O processor modules within Honeywell UCN architecture.
Field Installation Guidelines
- Ensure backplane power and external 24 VDC loop supplies are de-energized prior to connecting interface cables or terminal wiring.
- Mount the assembly onto the standard cabinet DIN rail or carrier channel using integrated mounting clips.
- Fasten signal cable drain wires directly to the FTA shield terminal bar to maintain continuous grounding and prevent high-frequency noise pickup.
- Confirm field loop total resistance does not exceed 250 ohm to prevent current driver saturation during peak 20 mA signal output
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
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- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Comprehensive Guide to Instrumentation and Control (I&C) Design Basis
Instrumentation and Control (I&C) Design Basis serves as the foundational technical document for modern plant engineering. Project teams rely on this master specification to govern engineering deliverables across front-end engineering design (FEED) and detailed execution phases. A well-constructed I&C design basis ensures seamless integration among field instrumentation, safety systems, and main control systems. Furthermore, establishing clear technical standards early mitigates execution risks and prevents costly re-engineering during plant commissioning.
The Shift to Flexible IO Modules in Modern Industrial Automation
Traditional control systems rely on dedicated Input Output (IO) cards for industrial automation. Each conventional module processes a single signal type, such as Digital Input (DI), Digital Output (DO), Analog Input (AI), or Analog Output (AO). A standard 16-channel card accepts only one specific channel type across all ports. This inflexible hardware design often creates severe engineering bottlenecks during project execution. Engineers frequently must install entirely new cards to accommodate a single extra sensor. Consequently, late design changes increase control cabinet space requirements and drive up project costs.
DCS Commissioning Steps in Industrial Automation Projects
Commissioning a Distributed Control System (DCS) represents a crucial milestone when deploying modern process automation infrastructure. Field engineers must execute systematic verification steps to transition complex control hardware from static installation to dynamic plant control. Proper commissioning ensures that controllers, I/O modules, network switches, and HMI software operate in strict compliance with engineering design specifications before introducing live process fluids.