Siemens SITRANS T3K PA, Instruction Manual

Page: 83 / 130

Instruction Manual 7NG3213
SITRANS T3K PA
C79000-B7174-C55-04
83
The electrical connection should be made as follows:
– The sensor pin assignment for the various connections (two, three and four-wire
circuits, difference/averaging circuit) can be seen in Figure 5, page 85.
– The connection is made exclusively by screw type terminals.
– Open the cover of the measuring point
– Strip the connecting cable about 150 mm.
– Separate the shield from the wire pair.
– Place the shield in the cable gland on the housing.
– Feed pre-assembled cable through the cable gland.
– Connect stripped wire ends at the terminals 5 and 6 (any polarity).
– Tighten nut and cable gland.
– Close cover of the measuring point.
1, 2, 3, 4 Sensor
5, 6 PROFIBUS-PA connection U
max
= 24 V
1
2 3
4
PROFIBUS
PA
5
--
6
+
Figure 4 Electrical Connection
The bus must be equipped with a bus termination at both ends for error-free
communication. At the end next to the control system this is alreaedy provided by
the bus termination in the coupler or link providing this is not switched off. An
additional termination must be fitted at the remote end of the bus.
!
WARNING
Only approved bus terminations, branchers, cables etc. may be used
in intrinsically safe circuits.