Description
The MTL 8937-HN is a Fibre Optic Extender designed to extend industrial communication links through optical fiber. It is associated with MTL/Eaton industrial communication and I/O applications and is suitable for environments where long cable distances, electrical interference, and galvanic isolation are important considerations. Current listings identify the 8937-HN as an MTL fibre optic extender, with versions also marketed under Eaton/MTL.
The module converts or extends communication between copper-based equipment and fiber-optic links, helping provide electrical isolation and reliable signal transmission over extended distances. It can be used in industrial automation, process control, distributed I/O, and hazardous-area-related applications.
Important lifecycle note: Honeywell documentation states that the 8937-HN was stopped by Eaton-MTL due to obsolescence, with 8937-HN2 identified as the replacement. Therefore, the 8937-HN is generally treated as an obsolete/legacy spare rather than a current-production model.
8937-HN
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | MTL / Eaton |
| Model | 8937-HN |
| Series | MTL Industrial Communication |
| Product Name | Fibre Optic Extender |
| Function | Fibre-optic extension of industrial communication links |
| Application | Industrial Automation / Process Control / Distributed I/O |
| Supply Voltage | 20–30 V DC |
| Maximum Current | Approx. 74–85 mA |
| Operating Temperature | Approx. –20°C to +70°C |
| Weight | Approx. 340 g |
| Product Status | Obsolete / Legacy Spare |
| Country of Origin | Varies by production/source |
| Discontinued | Yes – Eaton-MTL obsolescence reported |
The 20–30 VDC supply range and approximately 74–85 mA current figures are reported for current 8937-HN listings, while the exact mechanical dimensions and optical-interface specifications can vary by revision.
Common Questions & Answers
Q: What is the MTL 8937-HN used for?
A: It is used to extend industrial communication links over fiber optics, particularly where long-distance transmission and electrical isolation are required.
Q: Is the 8937-HN still manufactured?
A: Available lifecycle information identifies the 8937-HN as obsolete. Eaton-MTL reportedly designated 8937-HN2 as its replacement.
Q: What power supply does the 8937-HN require?
A: Available product listings specify a 20–30 VDC supply range.
Q: What should be checked before replacement?
A: Verify the complete part number, hardware revision, optical interface, communication protocol, supply voltage, wiring, and system compatibility before installation.
Q: Can an 8937-HN be used as a direct replacement for every optical extender?
A: No. The replacement must match the communication system and optical interface. The 8937-HN should be selected based on the original system configuration rather than by physical appearance alone.
