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
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As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
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