LDM85-ST-025

Fiber Optic Converter

LDM85-ST-025
Fiber Optic Converter

Product Availability:
  • Usually stock to 2-3 weeks.

Description

The LDM85 is a small, inexpensive fiber optic transmitter/receiver. It features a complete RS-232/422/423 port as well as high speed TTL data transmit and receive. It is capable of data rates from DC to 5M baud. A pair of these units allows most RS-232C cable links to be replaced and extended with a duplex fiber optic cable. The normal 50-foot RS-232 limit may be extended to 1.2 miles (2 km). Fiber optic data communications provide complete EMI/RFI rejection, isolation, elimination of ground loops, and reduced error rates. Data security is enhanced by almost nonexistent electromagnetic emissions. A unique multipoint capability allows local area networks to be formed with the isolation and data security of a fiber optic data highway.

The LDM85 is packaged in a rugged aluminum enclosure small enough to mount on the back panel of typical computer equipment, saving valuable desk and floor space. The RS-232 connection is through male or female EIA 25-pin connectors. The fiber optic connection is either through SMA (905) or ST connectors. Additional features include a TD/RD reversing switch for connection to DTE (Data Terminal Equipment) or DCE (Data Communication Equipment) ports, three diagnostic LED indicators, and locally connected handshake lines. The TTL port combined with the RS-232 port may be interfaced to RS-422/423 ports in 4-wire point-to-point mode only. Fiber optic cables may be ordered with connectors factory installed.

Specifications

  • Configuration Socketed ST fiber optic connector, U.S Wall transformer, 120VAC
  • Weight 390 grams (13.76 ounces)

Features

  • Data Rates to 5M Baud
  • RS-232, RS-422, TTL System Interfaces
  • Multipoint Capability
  • LED Indicators
  • DCE/DTE Switch
  • Small Size
  • Low Cost
  • SMA- or ST-Compatible Optic Connectors
  • 120/220VAC, +5VDC or 8 to 20VAC/DC Power
  • CE Compliant

Block Diagram

LDM85 block diagram

Accessories

PT3
U.S. style wall mount transformer, 120VAC View
PT3E
European style wall mount transformer, 220VAC View

Competitive Cross-Reference

  • No cross reference is available.
View Dataforth cross-reference data.
The information available through this competitive cross reference guide are based upon product catalog information obtained from a variety of sources. The competitive cross reference information is being provided to you free of charge for your use. While Dataforth Corp has used reasonable efforts to ensure data accuracy, Dataforth Corp does not guarantee that it is error-free, nor does Dataforth Corp make any other representation, warranty or guarantee that the information is accurate, correct, reliable or up-to-date. Dataforth Corp expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties of merchantability or fitness for a particular purpose.

This information is provided only as a convenience on an "as is" basis and Dataforth Corp. or its representatives or distributors are not responsible for any incorrect, inaccurate, or incomplete information. You are solely responsible for (1) selecting the appropriate Dataforth products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements.

FAQ

Due to resource constraints on my computer, I'm unable to open the three dimensional CAD models provided on your website. Does Dataforth provide two demensional CAD models for download as well?
Two dimensional CAD models can be generated upon customer request. Please contact Customer Service for assistance.
Will the LDM85 work with LVTTL?
Because the high/low thresholds for 5VTTL and LVTTL are the same, the LDM85 will work with this standard.
Does the LDM85 come with a power supply?
All power supplies are sold separately from the LDM85. The PT3 and PT3E are compatible power supplies with the LDM85.
Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased. You can either a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

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