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Signal Powered Limited Distance Modem

LDM35 Series

LDM35 Series:Signal Powered Limited Distance Modem

Signal Powered Limited Distance Modem

$145.00 LDM35-P

1 year warranty CE OmegaCare
  • Signal-Powered: No Power Source Required
  • Optical Isolation: Breaks Ground Loops
  • Heavy Duty Surge Protectors: Prevents Lightning Damage
  • LED Diagnostic Indicators: Simplifies Installation and System Troubleshooting
  • Operation to Two Miles (3.3 KM) at 9600 Baud, One-Half Mile (0.8 KM) at 19,200, Seven Miles (11.7 KM) at 1200 Baud
  • Four-Wire Full Duplex, Two-Wire Simplex
  • Selection of Connectors
  • Wide Operating Temperature Range, 0 to +70°C
  • Null Modem Switch
Communication Products and Converters - View related products

Description

The LDM35 Series of products is designed to allow video display terminals (VDTs) and other RS-232 devices to be connected over distances sufficient to cover any industrial or institutional complex of buildings. These modems feature a rugged enclosure small enough to mount on the back panel of VDT units, saving valuable desk and floor space. The LDM35 Series does not require a power supply for operation. The use of low power circuits and a sensitive optical receiver allows the devices to derive all necessary power from the RS-232 data and control signal. They are designed for full-duplex, asynchronous operation over two, DC-continuity, non-loaded, twisted-wire pairs. Two-wire simplex operation may be accomplished over two wires. The modem circuits and, consequently, the host device are protected from electrical transients due to lightning strikes or operation of heavy industrial equipment. Each device features a convenient Data-Communication Equipment (DCE) to Data-Terminal Equipment (DTE) switch which reverses pins 2 and 3 of the RS-232 connector. For installation and troubleshooting, each unit has diagnostic Light-Emitting Diodes (LEDs) on the transmit and receive lines. The RS-232 connector may be ordered as a male or female 25-pin connector. Field connection is made through a modern, solderless, screw-termination assembly. Alternatively, a convenient four-wire modular phone jack is available. Model LDM35 is powered by the RS-232 data and control signals from its host computer or terminal device. It receives power from Data Terminal Ready, pin 20 or Request To Send, pin 4, and Transmitted Data, pin 2. Transmitted data may be on pin 3 when the DCE/CTE switch is in the DTE position. For proper operation, minimum required signal voltage level is ±6 V at 3.0 mA to 10.0 mA.
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Most Popular Models!

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Part Number/Desc.
Availability
Price
Description
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LDM35-P
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Availability: In Stock  
$145.00   
Signal powered limited distance modem, 25 pin male RS-232 connector, screw termination field connector
 
LDM35-S
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Availability: In Stock  
$145.00   
Signal powered limited distance modem, 25 pin female RS-232 connector, screw termination field connector
 
LDM35-PJ
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Availability:  
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Signal powered limited distance modem, 25 pin male RS-232 connector, modular phone jack field connector
 
 
LDM35-SJ
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Availability:  
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Signal powered limited distance modem, 25 pin female RS-232 connector, modular phone jack field connector
 
 
All amounts shown in USD
Note: Includes operator’s manual.