Honeywell 8937-HN Fiber Optic Extender Module – Obsolete TDC 3000 Spare Part

Technical Dossier

Product Details And Specifications

Honeywell 8937-HN Fiber Optic Extender Module – Obsolete TDC 3000 Spare Part

DriveKNMS reviews sourcing options for this model during RFQ handling before quotation.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters beyond those listed above are not published here to prevent misapplication. Contact our technical team to verify compatibility with your specific system revision and firmware level before ordering.

Solving the Discontinued Hardware Crisis

The Honeywell TDC 3000 platform entered service in the 1980s and remained the backbone of process control in petrochemical, refining, pulp and paper, and power generation facilities for decades. Its modular architecture — of which the 8937-HN fiber optic extender is one functional node — was engineered for deterministic, high-reliability communication across distributed I/O cabinets. That architecture is precisely why so many facilities still operate it today: it works, and the cost of replacing it is prohibitive.

How to extend your TDC 3000 asset life by 5–10 years through targeted spare parts strategy:

Condition & Reliability Assurance

Discontinued hardware sourced from the secondary market carries inherent risk. DriveKNMS applies a five-step QA protocol to every 8937-HN unit before it leaves our facility:

1. Visual and mechanical inspection. Full examination of the PCB, connector pins, and housing for physical damage, corrosion, or evidence of prior field failure. Units with pin corrosion, burn marks, or compromised fiber connectors are rejected at this stage.
2. Electrolytic capacitor assessment. Modules of this age are subject to capacitor aging and electrolyte dry-out. We identify and flag units showing measurable capacitance drift. Where refurbishment is performed, only specification-matched replacement capacitors are used.
3. Firmware version verification. The firmware revision is documented and disclosed to the buyer prior to shipment. We do not ship units with unknown or unverifiable firmware states.
4. Functional bench test. Where test infrastructure permits, units are powered and tested for basic operational response. Test results are documented.
5. Packaging and ESD protection. All units are shipped in anti-static packaging with desiccant. Long-term storage units are vacuum-sealed.

Key Features for System Maintenance

Can DriveKNMS source other TDC 3000 components?
Yes. DriveKNMS specializes in obsolete and hard-to-find industrial automation components across Honeywell, ABB, Siemens, Rockwell, and other major DCS and PLC platforms. Contact us with your full bill of materials for a consolidated sourcing assessment.