Lorenz Messtechnik GmbH
Obere Schlossstrasse 127/129/131
73553 Alfdorf
Phone +49 7172 93730-0, Fax +49 7172 93730-22
Technical changes, errors and misprints excepted.
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3.2 Health Protection and Safety
To ensure that our products are safe and do not pose a health hazard, the following points must be
observed:
1.
Read all relevant sections of this manual carefully before starting work.
2.
All warning signs on containers and packaging must be observed.
3.
Installation, operation, maintenance and repair work may only be carried out by suitably trai-
ned personnel and in accordance with the instructions given. If one of these instructions is not
followed, the user of the product bears full responsibility for any consequences that may occur.
4.
Disconnect the appliance from any power supply before opening it.
5.
The safety instructions must be strictly observed in order to avoid damage to property and
bodily injury - possibly even fatal ones.
3.3 Conversions and Changes
The device may not be modified in terms of design or safety without the express consent of Lorenz
Messtechnik GmbH. Any modification excludes any liability on our part for damages resulting there-
from. Repairs and modifications are prohibited.
3.4 CE Marking
With the CE marking, Lorenz Messtechnik GmbH guarantees that its product meets the requirements
of the relevant EC directives.
4 Preamble
4.1 Product Description
The SI-RS485 is an amplifier which processes analogous measured values and converts these sig-
nals into digital signals. These measured data can be retrieved by the PC by means of the RS485-Inter-
face. The current supply occurs via a separate power supply which is included in delivery.
Required output voltage:
12 ... 30V
Required power supply:
600 mA
The SI-RS485 is suitable for the connection and simultaneous value acquisition of two sensors. De-
pending on the SI-RS485 model, respectively four different types of sensor signals can be captured
(for specifications see data sheet):
Strain gauge signals:
±3 mV/V
(corresponds ±30000 digits)
Active signals with voltage input:
±5V
(corresponds ±25000 digits)
Active signals with voltage input:
±10V
(corresponds ±25000 digits)
Active signals with current input:
0 ... 20 mA
(corresponds 0 ... 20000 digits)
Active signals with current input:
4 ... 20 mA
(corresponds 0 ... 20000 digits)
The amplifier type and the resolution are stated on the type label, a type change is only possible by
the manufacturer. Hence, only the corresponding sensor type can be connected.
