Safety
©
TR-Electronic GmbH 2007, All Rights Reserved
Printed in the Federal Republic of Germany
Page 8 of 37
TR - ELE - BA - GB - 0008 - 06
14.12.2007
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 (RS422, RS485 etc.), twisted-pair wires must
be used in addition.
•
Use a minimum cable cross-section of 0.22 mm
2
for data transfer purposes
.
•
Use a minimum earthing cable (machine base) cross-section of 10 mm
2
in order to
avoid equipotential currents across the shield. Make sure the resistance of the earthing
cable is much lower than that of the shield.
•
Avoid crossing cables where possible. If unavoidable, only cross them at right-angles.
•
Ensure continuous wiring of the shield and a large contact area on special shield
clampings or cable screw glands, see Figure 1 point
(A)
and
(B)
.
RD
BA
U
1
20
X1
DIP-Switch
ON
OFF
2
0
2
7
A
B
RC
Figure 1: Connection cap with cable screw glands and shield clampings
Shield connection via cable screw glands:
1. Screw the cable screw gland into the housing.
2. Dismount the compression nut (1) and the terminal
holder (2).
3. Push the compression nut (1) and the terminal
holder (2) over the cable.
4. Strip the cable; push back the braiding around the
terminal holder (2) such that the braiding goes over
the inner O-ring (3) and does not lie over the
cylindrical section or the torsional bars.
5. Insert the terminal holder (2) into the intermediate
gland (4) such that the torsional bars fit into the
intended lengthwise grooves in the intermediate
gland (4).
6. Screw the compression nut (1) to the intermediate
gland (4).
Element 1
Compression nut
Element 2
Terminal holder
Element 3
inner O-ring
Element 4
Intermediate gland
