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304165 - 4165 High Speed Rugged ST Fiber-to-USB Converter

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    • ST Fiber-to-USB Converter
Base Price:
Catalog No: 304165
Model No: 4165
Product Type:Interface Converter
Converter Port Connector:ST, USB Type-B
Conversion Type:Glass Fiber, USB
Speed:Fiber: 300 bps to 3 Mbps, USB: 1.5 Mbps to 12 Mbps
Wavelength Nano:820 nm/850 nm, multimode

Ideal for Isolated PC USB Communications to Fiber Serial Interface Networks.

Shipping Terms

Shipments are made via UPS Ground, unless otherwise specified. Freight charges are prepaid and added to your invoice. We can estimate the freight costs for you.

We can ship freight collect on your account, just provide your UPS Account Number.

We can also ship via the carrier of your choice. Provide the details and your account number.

Products shall be shipped F.O.B. Electro Standards' facility. Title to and risk of loss or damage to the products shall pass to you upon Electro Standards delivery of the products to a carrier for shipment. Title to software will remain with the applicable licensor. Electro Standards' prices do not include shipping and handling charges. Electro Standards reserves the right to use its own discretion in the manner and routing of shipments. Electro Standards shall be permitted to deliver products in separate lots.

Shipping Return Policy

  • To return an item, contact Electro Standards at 401-943-1164 to obtain a Return Material Authorization (RMA) number. RMA numbers are valid for 30 days after the date of the shipment and cannot be extended or re-issued. We are unable to accept returns without an RMA number.
  • All returns except those of defective product are subject to a 15% restocking fee, and additional charges for handling or freight are refunded only in cases of defective products.
  • Return freight must be shipped prepaid. We recommend that you insure the package as you are responsible for risk of loss on all returned packages. We recommend that all cartons are properly packed as Electro Standards is not responsible for product damaged en route. We do not issue call tags for product returns.
  • Returned product must be clean, undamaged, and complete with all manuals, accessories, documents and packaging. The items must be in a resalable condition.
  • The product must have with it a copy of the original invoice or packing slip and the appropriate RMA paperwork.
  • If your item is not working properly, please contact Electro Standards at 401-943-1164 for help in trouble-shooting your application.
  • If the product is defective, Electro Standards will repair or replace that item (at our discretion) upon receipt and evaluation of the original product.
  • Electro Standards reserves the right to authorize product returns after 30 days from the invoice date in some cases. If the product is accepted after 30 days, credit will be issued toward future pruchases only and some additional restocking charges may be applied.
  • All credits from RMAs must be used within one calendar year of issue.

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Interface Converters, Glass Fiber to Copper Interface

Model 4165 High Speed Ruggedized ST Fiber-to-USB Interface Converter, Desktop enclosure

  • Popular Application: Isolated PC USB Communications to Fiber Serial Interface Network.

Model 4165, (Desktop enclosure) ST Fiber-to-USB Interface Converter with integrated rate buffering convert USB 2.0 compliant data rate from a standard PC to a serial asynchronous data interface over fiber with a user-selectable baud rate of up to 3 Mbps. This converter is ideal for high speed, secure communications, and optical isolation.

Typical applications:

  1. Constructing an optically isolated point-to-point communications link between the USB ports of two PC's.
  2. Constructing an optically isolated high-speed communication link between a PC and a serial data network that is subject to high EMI environment that might corrupt communications over a copper interface.

The Model 4165 Unit features ESD protection circuitry on the USB I/O connector. The power input is protected from transients and features 3kVDC isolation to prevent system ground loops. The Model 4165 converter can be powered from a wide input range of 10VDC-36VDC. Models are available for other voltage ranges such as 4.5VDC-9VDC and 19VDC-72VDC.

Three configurations are:

  • Model 4165 Desktop Unit, for applications requiring an enclosure.
  • Model 4165-DIN, for application requiring mounting on a DIN rail.
    • Models 4165/4165-DIN/4166 units are factory configurable for USB port powered operation. Other features include user-selectable fiber, polarity, user-selectable asynchronous data format, and Tx, Rx, and Power indicator LED's.
  • Model 4166 (board only) for embedded applications. The board has front mounting threaded brackets that facilitate rack mounting.\
    • Only the Model 4166 board unit has dual DB9 power connectors for convenience is in bused power applications.
  • Ruggedized for military applications.

Block diagram for Model 4165/4165-DIN/4166 Glass ST Fiber to Copper USB Interface Converter:


    • Connectors: Fiber Optic ST
    • TX Power: -12.5 dBm
    • RX Sensitivity: -27.5 dBm
    • Optical Budget: 15 dB
    • Max. Link Distance with 62.5/125µm fiber:
      • 5.35 km up to 3 Mbps, 25°C
      • 3.75 km up to 3 Mbps, -40°C to 85°C
  • Wavelength: 820 nm/850 nm, multimode
  • Fiber Size: 50/125 µm, 62.5/125 µm, 100/140 µm.
    • Logical 1 = Light ON/OFF: User Selectable
    • Type: Asynchronous, user selectable format
    • Rate: User selectable baud rates from 300 bps to 3 Mbps
    • Fiber-to-USB rate conversion: Internally buffered.
    • Connectors: USB, Type B, High Retention
    • Type: USB 2.0 Compliant USB Client
    • Rate: Supports low speed (1.5 Mbps) and Full speed (12 Mbps) USB Data transfer rates.
    • LEDs: TXD, RXD, PWR
  • POWER:
    • Input Power: 10VDC-36VDC std, 4.5VDC-9VDC, 19VDC-72VDC, Others at 1.5W
    • Isolation: 3kVDC
    • Connectors: Dual DB9F for Power Daisy Chaining (board only)
    • DC Power Jack (desktop unit): The model 4165 and 4165-DIN are made via a circular barrel connector with a 0.1" center pin.
    • Power Supply: Models 4165 and 4165-DIN are supplied with an external power supply operating from 100-240VAC/50-60Hz (Cat. No. 523520)
    • USB port powered (factory configurable)
    • -40°C to 85°C
  • Model 4166 Mechanical (Board Only):
    • Model / Cat No: 4166 / 304166
    • Size: 4.8" x 3.9" x 0.63"
    • Weight: Approx. 3.2 oz (91g)
    • Mounting: Mounting Holes, Rt Angle Brackets
  • Model 4165 Mechanical (Desktop Unit):
    • Model / Cat No: 4165 / 304165
    • Size: 5" x 4.25" x 1.4"
    • Weight: Approx. 9.8 oz (278g)
  • Model 4165-DIN Mechanical (DIN Rail Mounted Unit):
    • Model / Cat No: 4165-DIN / 304165-DIN
    • Size: 5" x 4.25" x 1.4"
    • Weight: Approx. 9.8 oz (278g)
    • Mounting: 2 Threaded Holes Std, DIN rail
    • DIN Rail Size: 2.84" x 1.24" x 0.16"
    • DIN Rail Weight: 0.9 oz (25.5g)

Model 4165/4165-DIN/4166 Point-to-Point Isolated PC USB Communications Application: Copper Interface to Glass ST Fiber to Copper Interface Conversion

A PC is connected to the DB9 Copper interface of the Model 4165. The Glass ST Fiber port of the Model 4165 is connected to a second Model 4165 Glass ST Fiber port. The second Model 4165 DB9 port is connected to another computer via the DB9 port connector.

Model 4165/4165-DIN/4166 Isolated PC USB Communications to Fiber Serial interface / Network Application: Copper Interface to Glass ST Fiber Conversion

 A PC is connected to the DB9 Copper interface of the Model 4165. The Glass ST Fiber port of the Model 4165 is connected to a Fiber Serial Interface / Network up to 5 Mbps

Model 4165/4165-DIN/4166 to Model 4149/4149-DIN/4159/4159CC Isolated PC USB to RS232/RS485 Communications Serial Interface / Network Application: Copper Interface to Glass ST Fiber to Copper Interface Conversion

 A PC is connected to the USB Copper interface of the Model 4165. The Glass ST Fiber port of the Model 4165 is connected to the Model 4149 Glass ST Fiber port. The Model 4149 DB9 port is connected to a Serial Interface / Network up to 3 Mbps.

This high-quality interface converter is available to city, state, and federal government purchasers at a discounted price and favorable payment and shipping terms via GSA Schedule GS-35F-0286V. Click here for GSA details.

Model 4165 and Model 4166 Fiber to RS485 Interface Converters are available to government purchasers on our GSA Schedule GS-35F-0286V. Call for discounted price and terms.

To view more of Electro Standards' Media Converters, click here: Interface Converters.

Electro Standards can supply all your Network Cable requirements. Click here to reach our CABLES, CONNECTORS/ADAPTERS Webpage.

For custom network interface converters call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our online form: /Products-Custom/Copper-Switch/

All data switches, data communication products, and data acquisition products are subject to a one year warranty against manufacturing defects.  The limit of ESL liability is limited to the cost of the ESL product provided.

*Prices online are subject to change and verification.

All ESL products are available for export.

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