| The asynchronous LH-4VE and LH-4VR line splitter
divides a V.24-/M-1 modem connection into a RS422/
RS485/V.24 interface and a V.24-/M-1 modem interface,
the RS422/RS485/V.24 interface being galvanically
insulated from the other interfaces. For
example, this enables several RS422/RS485 networks
to be connected to a common station via the 4-wire
M-1 modem interface, or enables several addressed
input devices distributed in different buildings with
RS422/RS485/V.24 interfaces to be connected to a
common network.
The different interface standards support Pro.-
Bus, Modbus and any other .eldbus system, the contents
of information and protocols are not in.uenced
by the short device running times. The data .ow
direction supports any master/slave networks and
Multimaster networks (token passing). The distance
between two LH-4VE/LH-4VR may be extended as far
as 21 km, by means of the modem interface, the data
connection being galvanically insulated by the optocoupler
interfaces. After each line splitter the data
is transmitted in regenerated form. If one device
fails, the line splitter is bridged with relay control, so
that the modem connection is restored without data
regeneration. This bypass function provides a high
degree of data protection. The transient protection
in the line splitter provides good protection against
lightning and overvoltages, and the galvanic insulation
provides protection when there are differences
in potential.
The LH-4VE is the LT-4V for the 35 mm mounting
rail and operates at a voltage of 24V DC. The signal
status is displayed by means of LEDs (Power, TD, RD
and DCD) on the front panel. The LH-4VE supports the
RS422 additionally to the LT-4V at the interface X2.
The LH-4VR is extended LH-4VE by the redundancy
card OR-1.Thereby ring systems on base of the M-1
modem interfaces are possible. The information of
the attached devices is sent on 2 separated ways to
the communication partner. During a break of the
ring the communication remains and the line splitters
at the interrupted connection announce the disturbance
over a reporting contact.
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| Divides a connection into 2 interfaces |
| RS422/RS485/V.24 and V.24/M-1 modem interfaces |
| RS422/RS485/V.24-interface galvanically insulated |
| Repeater function and bypass function |
| Redundant ring systems for RS422/RS485/RS232 |
| Communication control |
| 0-115 200 bps, asynchronous |
| 24V DC operating voltage |
| Simple installation |
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| Technical data LH-4VE and LH-4VR |
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| Transmission:
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Asynchronous, code independent, full-/
half-duplex or simplex
Regulator
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| Interface X1:
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EIA RS232-C and CCITT V.24/V.28 or 10 mA
tristate balanced current loop (M-1)
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| Interface X2:
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EIA RS232-C and CCITT V.24/V.28
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| EIA RS485
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| V.11 (2-wire) or EIA RS422 (4-wire)
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| Isolated from interface X1,X3 and power
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| Interface X3:
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EIA RS232-C and CCITT V.24/V.28 or 10 mA
tristate balanced current loop (M-1)
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| Connections:
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DIN 41612 connector or 35 mm support
rail assembly base with screw terminals
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| Transfer speed:
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0-115 200 bps
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| LED displays:
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Network, TD, RD and DCD
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| Insulation:
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Galvanic insulation of the data transfer
by optocouplers (M-1 interface only)
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| Interface X2 galvanically insulated from
interface X1, X3 and power
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| Transient protection:
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Suppressor diodes and varistors
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| Insulation voltage:
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M-1 interface: 420 Vrms
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| Interface X2 - power: 420 Vrms
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| Interface X2 - interface X1,X3: 420 Vrms
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| Supply voltage:
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24V DC ±10%
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| Other voltages on request
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| Current consumption:
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200 mA maximum
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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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| Range of RS422/RS485 interface
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| Other model versions
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| LT-4V:
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LH-4VE without RS422 in a table top case with 230V AC supply
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| LT-1V:
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as LT-4V, all interfaces as V.24/M-1 modem
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| LH-1V:
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LT-1V for 35mm DIN rail mounting
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| LR-1V:
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Variation of LT-1V for the 19" rack system
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