| The asynchronous LH-4VLWL line splitter divides
a multi-mode fibre optic connection into a RS485/
RS422/ V.24 interface and a further fibre optic interface.
For example, the line splitter enables several
RS485/ RS422 networks some distance apart to be
combined by a 2-.bre .bre-optic interface to form
a common station, or it enables several addressed
input devices, distributed in different buildings, to
be connected to a common network.
The direction of data .ow supports any master/
slave networks and Multimaster networks (tokenpassing).
The information contents and protocols are
not affected by the short device running times. At
the RS232/ V.24 interface the line splitter supports
speeds of up to 100 kbits/s, and for the RS422/RS485
interface speeds of up to 1 Mbits/s. After each
line splitter the data are reproduced in regenerated
form. The distance between two LH-4VLWL’s may be
up to 3 km, the data connection being galvanically
insulated by the .bre optics and being insensitive to
electromagnetic interferences such as overvoltages
and lightning. The RS485/RS422/V.24 interface is
protected by a transient protection against interferences.
The LH-4VLWL is suitable for assembly on a 35 mm
DIN mounting rail, and the converter is mounted
on the bar by means of an assembly base. This
base consists of a retaining device for the rail and a
screw terminal strip for the RS485/RS422/V.24 interface
connection. The interface converter is placed
directly on the assembly base, contact with the connections
being made automatically. This assembly
base guarantees simple installation or replacement
of devices. The line splitter is operated with a supply
voltage of 24V DC, and the signal status is displayed
by means of LED’s (Power, TD, RD and DCD) on the
front panel.
The LH-4VLWL meets the most stringent requirements
regarding reliability, operation and performance,
and because of their simple handling the
devices can be installed without problem.
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| Divides a .bre optic connection into 2 interfaces |
| 2 multi-mode fibre optic interfaces |
| RS485/ RS422/ V.24 interface |
| Full duplex and code-transparent |
| RS422/ RS485 direction detection:
transmit/receive |
| 0-1 Mbits/s, asynchronous |
| 24V DC operating voltage |
| Simple installation on 35 mm DIN rail |
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| Technical data LH-4VLWL |
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| Data transfer:
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Asynchronous; full-, half duplex or simplex
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| code-transparent
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| Interface X1:
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Multi-Mode fibre optic 820nm
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| 2-fibre connection,
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| 2 SMA/ST* plug 50/125mm, 62.5/125mm, 100/140mm, 200mm
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| Receiver sensitivity: -25dBm
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| Interface X2:
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EIA RS232, V.24/V.28
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| EIA-RS422(4-wire) EIA RS485, V.11 (2-wire)
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| Connections via DIN 41612 connector or 35 mm mounting rail;
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| assembly base with screw terminals
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| Interface X3:
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Multi-Mode fibre optic 820nm
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| 2-fibre connection,
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| 2 SMA/ST* plug 50/125mm, 62.5/125mm, 100/140mm, 200mm
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| Receiver sensitivity: -25dBm
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| Transfer speed:
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RS232: 0-100,000 bits/s.
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| RS422/RS485: 0-1 Mbits/s
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| LED displays:
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Power, TD, RD and DCD
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| Insulation:
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Protective conductor connection only used for discharging interference voltage
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| Transient protection:
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Suppressor diodes and varistors
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| Insulation voltage:
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420 Vrms
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| Supply voltage:
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18-30V DC
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| Other voltages on request
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| Current consumption:
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110 mA
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| Temperature range:
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5-50°C ambient temperature
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| Humidity range:
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0-95% relative humidity
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| Dimensions in mm:
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47 x 129 x 134 (WxHxD) assembly base excluded
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| Assembly base 75 x 100 x 25 (WxHxD)
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| Casing material:
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Plastic ABS, black
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| aluminium back
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| Weight:
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0.25 kg
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| assembly base add 0.1 kg
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| Assembly:
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By assembly base on 35 mm DIN mounting rail (EN 50022)
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| Conformity:
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CE
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| Optional:
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Redundance extension interface X2:
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| 2-wire current loop (20 mA, TTY)
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*ST Trade mark of AT&T
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| Range of fibre optic interface
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| Range of RS422/RS485 interface
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| Maximum transfer distance: 0-1 200 m at 0-1 MBit/s. Use pair twisted,
unscreened cables. The transfer characteristics deteriorate as the capacitance increases
and the cable cross-section is reduced. Use screened cables in heavy interference environment
but consider that higher capacitances reduce the transmission distance.
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| Range of RS232/V.24 interface
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| Maximum transfer distance: 15 m
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| Other fibre optic modems
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| M-1LWL:
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V.24 fibre optic modem
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| M-5LWL:
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RS485/RS422 fibre optic modem
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| LT-4VLWL:
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Line splitter as table-mounted device
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