Product Details
Product Description
The TC-MUX021 (51404391-125) is a high-performance serial multiplexer interface designed for integration within Honeywell Experion PKS and legacy PLC architectures. This module acts as a specialized communication bridge, enabling the controller backplane to interface with serial-based field devices and peripheral subsystems. Engineered for industrial reliability, it manages data flow across multiple serial channels, ensuring deterministic timing and data integrity for critical process variables.
Technical Specifications
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Model Identification: TC-MUX021
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Associated Part Number: 51404391-125
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Primary Function: Serial Multiplexing / Device Interface
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Operating Voltage: 24 VDC (Nominal)
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Current Consumption: 1.0 to 1.3 Amps
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Input Current: 5.6 mA (typical signal load)
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Form Factor: Rack-mounted PLC I/O slot
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Physical Mass: 0.48 kg (approx. 1.06 lbs)
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Lifecycle Status: Discontinued by Manufacturer (Legacy Spares Support)
Operational Utility and Integration
The TC-MUX021 (51404391-125) is frequently deployed in process industries where legacy serial sensors, barcode readers, or specialized flow meters must communicate with a modern DCS or PLC backplane. Its robust 24VDC design and high-current tolerance (up to 1.3A) reflect its capability to handle complex multiplexing tasks across multiple ports without signal degradation. As a discontinued component, it remains a vital inventory item for maintaining the communication infrastructure of existing Honeywell control rooms.
Frequently Asked Questions
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What specific serial protocols does this module support?
The TC-MUX021 typically interfaces with standard RS-232, RS-422, or RS-485 signaling, depending on the software configuration and cable pinouts used at the terminal block.
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Can this module be hot-swapped in a powered rack?
While many Honeywell I/O modules support live insertion, it is best practice to verify that the serial communication loop is paused or that the redundant controller is active before swapping the TC-MUX021 (51404391-125) to avoid transient data errors.
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.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- 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
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.