Signal Powered Limited Distance Modem |
| LDM35 Series |
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Signal Powered Limited Distance Modem
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¥
1,660.00
LDM35-P
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Signal-Powered: No
Power Source Required
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Optical Isolation: Breaks
Ground Loops
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Heavy Duty Surge
Protectors: Prevents
Lightning Damage
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LED Diagnostic
Indicators: Simplifies
Installation and System
Troubleshooting
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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
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Four-Wire Full Duplex,
Two-Wire Simplex
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Selection of Connectors
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Wide Operating
Temperature Range,
0 to +70°C
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Null Modem Switch
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View related products - Communication Products and Converters
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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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† Price are shown in RMB.
Note: Includes operator’s manual.
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Keywords:Signal Powered Limited Distance Modem
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