Transformer Temperature Monitoring (X3); Fig. 80: Connection For Monitoring The Welding Transformer Temperature; Fig. 81: Transformer Temperature Not Monitored By Timer - Bosch Rexroth PSI 6 Serie Betriebsanleitung

380 / 460 Bosch Rexroth AG
Assembly
7.2.15

Transformer temperature monitoring (X3)

For information on whether and how the function is available in your
unit, please refer to the type-specific manual.
Connection: to X3; STKK, grid 3.5 mm, 8-pole,
max. 1.5 mm
Mating connector is comprised in the delivery.
Cable length: max. 100 m (with recommended cable type)
Cable type: shielded, core area min. 0.75 mm
(e.g.: 2 x 2 x 0.75 mm
Order no.: 1070 913 494)
The timer has a temperature monitoring input which ensures protection
of the connected welding transformer.
An excessive temperature is signalled to the timer via a floating contact
that must open if the transformer gets too hot.
In the event of overtemperature (message: transformer temp too high),
the timer will directly stop a running welding process, while immediately
interrupting a seam operation.
A restart is not possible unless the transformer temperature has retur­
ned to values below the critical limit.
The cores for the transformer temperature and the KSR sensor may
be in a common connection line. We offer suitable cables containing
4 cores for this purpose.
X3
3
Shield
4
Transformer temperature
5
Transformer temperature
Shield connection to terminal 3 of X3 only !

Fig. 80: Connection for monitoring the welding transformer temperature

Of course, applications can be implemented involving welding trans­
former monitoring not by the timer, but rather by a PLC.
You should also make sure that the PLC inhibits additional welding
"
schedules if the permitted temperature range is exceeded!
If the timer - in spite of an existing monitoring function - is not supposed
to monitor the welding transformer temperature, the following wiring
has to be made:
X3
4
Transformer temperature
5
Transformer temperature

Fig. 81: Transformer temperature not monitored by timer

PSI 6xxx |
2
.
2
LiYCY,
Welding transformer
D
Temperature contact
Jumper
1070080028 / 08
2
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