Safety
#Leuze electronic
GmbH + Co KG, Postfach 11 11, D-73277 Owen/Teck, In der Braike1, D-73277 Owen/Teck, Tel. ++49 (0)7021/5730, Fax ++49 (0)7021/573199
Date: 01.12.2004
LZ - ELE - BA - GB - 0006 - 06
Page 7 of 28
1.2.1.1 General interference suppression measures
•
Lay the (shielded) connecting cable to the device at a sufficient distance or in a
separate room from any power cables which are subject to interference. Otherwise
the data transmission of the measured value can be interfered.
•
To ensure reliable data transmission, use fully shielded cables and make sure they
are well earthed. For differential data transfer (SSI, Profibus), twisted-pair wires
must be used in addition. For the Profibus absolutely the installation requirements
(bus cable, line length, shielding etc.) specified in the EN 50170 standard are to be
considered.
•
Use a minimum cable cross-section of 0.22 mm
2
for data transfer purposes
.
•
Avoid crossing cables where possible. If unavoidable, only cross them at right-
angles.
•
Especially with the SSI interface it has to be taken care that the screen cover of the
SSI signal lines Clock+/- and Data+/- reaches as near as possible to the
connection place. A screen-free wiring of longer than 10cm (approximate value)
must be avoided.
•
Ensure continuous wiring of the shield and a large contact area on special shield
clampings or cable screw glands (see arrows).
0 1
2
3
4
5 6 7
8
9
0 1
2
3
4
5 6 7
8
9
ERR
RUN
OK
0 1
2
3
4
5 6 7
8
9
0 1
2
3
4
5 6 7
8
9
ERR
RUN
OK
Figure 1: Connection cap with cable screw glands and shield clampings
Summary of Contents for OMS2/120 PB
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