51404391-375 | Honeywell | TC-MUX021 RS-485 Communication

Availability: 20 left in stock

Product Overview The TC-MUX021 (Part Number 51404391-375) is an authoritative serial interface communication module engineered for Honeywell Experion PKS and TDC 3000 systems....

SKU: TC-MUX021 51404391-375

Manufacturer: Honeywell
Product No.: TC-MUX021 51404391-375
Product Type: Serial Interface Communication Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 900g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The TC-MUX021 (Part Number 51404391-375) is an authoritative serial interface communication module engineered for Honeywell Experion PKS and TDC 3000 systems. It acts as a mechanical necessity for establishing deterministic RS-485 serial links between the DCS controller and field-level devices. Designed to operate in high-EMI environments typical of oil and gas refineries and power plants, the TC-MUX021 ensures signal integrity through advanced noise suppression. It facilitates multi-drop configurations, allowing multiple sensors, actuators, or third-party PLC gateways to communicate over a single serial bus with high reliability and hardware-timed precision.

Detailed Technical Specifications

Attribute	Details
Manufacturer	Honeywell
Model Number	TC-MUX021
Part Number	51404391-375
Product Type	Serial Interface Communication Module
System Compatibility	Honeywell Experion PKS, TDC 3000
Communication Protocol	RS-485 (Deterministic Serial)
Interface Mode	Multi-drop, 2-wire or 4-wire configurations
Data Rates	Standard industrial baud rates supported
Galvanic Isolation	Integrated isolation for protection against ground loops
Operating Temperature	Standard industrial range (Wide range for cabinet mounting)
Dimensions	10.8 cm x 8.7 cm x 7.8 cm
Weight	0.9 kg (2.0 lbs)
Compliance/Certifications	CE, TUV, UL508, CSA, RoHS

Engineering and Application Application

Network Topology: The TC-MUX021 is primarily utilized in multi-drop RS-485 networks. It is the required expertise for linking disparate field instruments—such as smart transmitters or flow meters—to the central Experion controller over long distances without signal degradation.
Redundancy Configuration: For mission-critical loops, it is authoritative practice to deploy the 51404391-375 in redundant pairs. This ensures that a failure of a single serial module or port does not interrupt the data flow from the field to the HMI.
Signal Integrity: The module's internal noise suppression is a mechanical necessity for installations near variable frequency drives (VFDs) or heavy switchgear. This filtering prevents serial packet corruption, maintaining a trustworthy "heartbeat" for the control system.
Cabinet Integration: Due to its compact 10.8 cm width, the module facilitates high-density mounting within standard Honeywell chassis, optimizing cabinet space while providing high-performance serial gateway capabilities.

Technical FAQ

What serial protocols are compatible with the TC-MUX021?While the physical layer is RS-485, the module is designed to carry the standard serial protocols used within the Honeywell DCS environment, including deterministic multi-drop communication between I/O assemblies and controllers.

Does the 51404391-375 support hazardous location installations?Yes. With UL and TUV certifications, the module is constructed to meet the safety requirements for industrial environments, including Class 1 Division 2 hazardous areas when installed in accordance with proper enclosure guidelines.

How does the TC-MUX021 handle long-distance RS-485 runs?The module utilizes high-output drivers and noise-immune receivers. For extremely long segments, ensure that proper termination resistors are applied at the physical ends of the bus to prevent signal reflection, which is critical for maintaining trustworthy data transmission.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.