LDM85

LDM85-P-025•LDM85-S•LDM85-S-025•LDM85-P

SERIAL TO FIBRE OPTIC MODEM

LDM85 - Serial to Fibre Optic Modem

CE

CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.

RoHS

This product fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.

Extended Wide Temperature

These products utilise high quality industrial grade components enabling them to work in extended wide temperature environments. They are capable of running below -20C and above +70C and offer further protection than standard wide temperature rated products.

LDM85 Serial to Fibre Optic Modem
Featured in:Dataforth Communications

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LDM85-P-025

LDM85 with male DB25 connector and ST fibre optic connector

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LDM85-S

LDM85 with female DB25 connector and SMA (905) fibre optic connector

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LDM85-S-025

LDM85 with female DB25 connector and ST fibre optic connector

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LDM85-P

LDM85 with male DB25 connector and SMA (905) fibre optic connector

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PT3

12V AC US Power Supply

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PT3B

12V AC UK Power Supply

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PT3E

12V AC European Power Supply

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LDM85 overview

Description
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The LDM85 is a small, inexpensive fibre 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 fibre optic cable. The normal 50-foot RS-232 limit may be extended to 1.2 miles (2 km). Fibre 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 fibre 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 fibre 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.

Fibre optic cables may be ordered with connectors factory installed.

Features
  • Interface : Fibre Optic Modem with RS-232, RS-422/423, TTL host interface
  • Baud Rate Range : 0 - 100Kbps (RS-232), 5Mbps (TTL)
  • Max. Data Distance : 1.2 miles (2km) depending on cable
  • Modes : 2-fibre full duplex, 1-fibre simplex
  • Channel Lines : TD, RD, TTL TD, TTL RD
  • Control Lines : RTS, CTS, DSR, DTR, RLSD
  • MTBF : 120,000 hrs
  • Power : Host or External Powered (12V AC, 5V DC)
  • Operating Temperature : -40C to +85C
  • Industry leading industrial fibre optic modem
  • Data rates to 5M baud
  • RS-232, RS-422, TTL system interfaces
  • Multipoint capability
  • LED status indicators
  • DCE/DTE switch
  • Small size & low cost
  • SMA- or ST-compatible optic connectors
  • 120/220V AC, +5V DC or 8 to 20V AC/DC power
  • Available with a pinned male DB25 connector (LDM85-P) or a socketed female DB25 connector (LDM85-S)
LDM85 Datasheet
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+44(0)1782 337 800
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