S30.0.01.6C-03
GREISINGER
electronic GmbH
D - 93128 Regenstauf, Hans-Sachs-Straße 26
Fon: +49 9402 / 9383-0
Fax.: +49 9402 / 9383-33
eMail: [email protected]
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GIA 10
GRS485ISO
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GIA 10
RS232
Operating Manual
GRS 485 ISO
RS232 – RS485 Converter
1 Scope of supply
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GRS 485 ISO converter
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2-pole screw type/plug in connector for RS485 connection
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9-pole serial interface cable (RS232)
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operating
manual
2 General information
The GRS 485 ISO is a bi-directional interface converter RS232 <-> RS485, for the connection of up to 16
GIA or GIR to the serial interface of your PC.
The converter switches automatically from transmisson to reception mode. The switch back time between
transmission and reception mode can be chosen by means of a switch.
The interfaces are optically isolated. Echo can be suppressed if necessary by switch setting.
The settings are made by means of DIP-switches at the side of the housing:
Switch 1: echo suppression
off (switch up):
Standard operation with echo.
on (switch down):
The echo will be suppressed.
Switch 2: switch back time for fast data transfer
off (switch up):
Standard operation with switch back time of ~10 ms.
on (switch down):
Switch back time of ~2 ms.
Only at baud-rates >9600.
This is only necessary for short response times
(3..10 ms).
3 Installation and commissioning
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Connect the GIR/GIA (max. 16 devices) to GRS 485 ISO
according to the wiring diagram via a 2-pin connection
cable (twisted line recommended).
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Then connect the GRS 485 ISO to the RS232-interface
of your personal computer.
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Connect GRS 485 ISO to a supply voltage of 230VAC.
In case your PC is not equipped with a 9-pin Dsub-connector or in case it has already been assigned,
the GRS 485 ISO can also be connected to a 25-pin Dsub-connector via any commercial adapter (e.g.
GSA9S-25B).
If the interface converter GRS 485 ISO is not handled properly, the converter itself or the devices
connected may be subject to damage. In such a case we do not assume any warranty claims! The
manufacturer shall not be liable for any damage to other connected devices caused by the use of the
GRS 485 ISO.
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GRS 485 ISO
RS232 - RS485
Converter
RS232-
Interface
RS485-
Interface
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220...240V
50/60Hz
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9
