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Honeywell 51201557-350 Fiber Optic CouplerHoneywell 51201557-350 Fiber Optic CouplerHoneywell 51201557-350 Fiber Optic Coupler
Honeywell 51201557-350 Fiber Optic Coupler
Honeywell 51201557-350 Fiber Optic Coupler
Honeywell 51201557-350 Fiber Optic Coupler

Honeywell 51201557-350 Fiber Optic Coupler


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PRODUCT SKU : 51201557-350

PRODUCT TYPE : Fiber Optic Coupler Modules

PRODUCT VENDOR : Honeywell


  • 100% Genuine Parts – Risk-Free 30-Day Returns
  • 1-Year Warranty & Expert Support for Every Order

Product Details

The Honeywell 51201557-350, also cataloged as the 51201557 Input/Output Link Module, operates as a dedicated hardware component for high-speed, fault-tolerant signal routing and fiber optic optical coupling within Honeywell C300 and Series 8 I/O control network platforms.

Hardware Specifications

Parameter Specification
Model 51201557-350
Brand Honeywell
Origin USA
Weight Approx. 0.1 kg
Dimensions Approx. 12.7 cm x 12.0 cm x 1.8 cm
Operating Temp 0 deg C to 60 deg C
Power Consumption Powered via C300 backplane connection
System Compatibility Honeywell C300 Controller, Series 8 I/O Modules
Link Type Dual I/O Link interfaces (Link A and Link B)
Extension Support I/O Link Extender cards and Fiber Optic Coupler modules
Configuration Support Non-redundant and redundant controller topologies

FOUNDATION Fieldbus & Channel-to-Channel Isolation

The module provides signal path conversion and deterministic data routing across redundant Link A and Link B channels to support FOUNDATION Fieldbus and Series 8 I/O topologies. Galvanic channel-to-channel isolation on the communication interface prevents ground potential differentials from corrupting high-frequency I/O link serial streams. Integrated optical coupling interfaces maintain low-latency data frames across extended distances when paired with fiber optic extension units, suppressing common-mode electrical noise and electromagnetic interference.

Frequently Asked Questions

Q: How does the 51201557-350 module handle communication redundancy?

A: The module incorporates dual independent I/O Link interfaces designated as Link A and Link B, allowing automatic hardware-level switchover in redundant C300 controller configurations without interrupting I/O data scanning.

Q: Can the 51201557-350 be used for extended-distance I/O cabinet connections?

A: Yes, the module supports interfacing with I/O Link Extender cards and fiber optic coupler units to route signal traffic across extended physical distances outside the local chassis.

Q: Does this module require direct external DC power wiring?

A: No, operating power is drawn directly through the backplane bus connection of the C300 / Series 8 carrier assembly.

Field Installation Guidelines

  • Align the module with the card guide rails on the C300 carrier chassis and press firmly to ensure proper backplane header connector engagement.
  • Connect fiber optic or electrical I/O link cables to Link A and Link B ports, maintaining clear channel isolation labels across redundant pairs.
  • Observe standard static discharge precautions and wear a grounded ESD wrist strap during physical module handling and insertion.
  • Maintain a protective earth (PE) chassis ground connection to the enclosure frame to optimize noise suppression across high-speed link paths.

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.




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