| The LH-10 multifunction modem can be adapted to
a wide variety of applications. For example, as a line
splitter it supports master/slave and Multi-master
networks, and is therefore suitable for practically
any field bus system.
Because of the 3 ports with V.24, RS485 and M-1
modem interfaces, the modem can continue to be
used as a converter and modem. The line splitter
has a bypass function, i.e. the device is bridged with
relay control in the event of a power failure.
The modem requires an operating voltage of 24V
DC and can therefore be installed in almost any
switch cabinet. It supports speeds of up to 100,000
bits/s, and is full-, half duplex and simplex compatible.
The range of the M-1 modem interface is up
to 21 km, and it supports speeds of up to 100,000
bits/s. The range of the RS485 is up to 1000 metres,
at speeds of up to 100,000 bits/s.
The Hedin Tex LH-10 modem is suitable for assembly
on a 35 mm DIN mounting rail. The modem is
installed on the DIN bar by means of an assembly
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base, which consists of a retaining device for the rail
and a terminal strip for the interface connections.
The modem is placed directly on the assembly base,
contact with the connections being made automatically.
This assembly base, for instance, guarantees
simple installation in the switch cabinet. A device
can be replaced in just a few operations for service
purposes.
The interfaces comply with the standards RS485
or EIA RS232C/V.24/V.28, and they are all directly
accessible via the screw terminal strip without plug
bridges/jumpers.
The signal status is displayed by means of LED’s
(Power, RD, TD and DCD) on the front panel. The modem
is code-transparent, i.e. it is completely independent of
data structure and transfer protocols.
The transient protection in the modems provides
good protection against lightning and overvoltages.
This not only protects the multifunction modem but
above all the connected, more expensive terminal
devices.
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| RS485, V.24 and M-1 modem interfaces |
| 0-100.000 Bit/s, asynchron |
| Line divider for master/slave and Multimaster systems |
| RS485 direction detection: Transmit/receive |
| Installation by means of assembly base on the 35 mm DIN rail |
| Connections on assembly base |
| 24V DC operating voltage |
| Simple installation |
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| Technical data LH-10 |
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| Data transfer:
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Asynchronous; full-, half duplex or simplex
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| Interface 1:
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EIA RS232 and CCITT V.24/V.28 10 mA
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| tristate current loop (M-1)
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| Interface 2:
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10 mA tristate current loop (M-1)
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| EIA RS232 and CCITT V.24/V.28
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| EIA RS485, V.11 (2-wire)
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| Interface 3:
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10 mA tristate current loop (M-1)
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| Connections:
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All via DIN 41612 connector or 35 mm
DIN mounting rail assembly base with screw terminals
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| Transfer speed:
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0-100.000 Bit/s
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| code-transparent
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| Insulation:
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Galvanic insulation of the data transfer
by optocouplers (M-1 interface)
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| Transient protection:
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Suppressor diodes and varistors
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| LED displays:
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Network, TD, RD and DCD
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| Insulation voltage:
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M-1 interface: 420Vrms
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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 at 24V
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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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| Weight:
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0.6 kg
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| Casing material:
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Plastic ABS, black;
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| aluminium back
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| Assembly:
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By assembly base on 35 mm DIN mounting rail (EN50022)
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| Conformity:
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CE
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| Settings |
| Line termination for RS485 |
| Data and status signal .ow |
| Transmitter control by data and status |
| Master/Slave - Multimaster |
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