Transformer Temperature Monitoring (Xgm1) - Bosch Rexroth PRC 7000 Betriebsanleitung

280 / 334 Bosch Rexroth AG
Assembly
7.2.10

Transformer temperature monitoring (XGM1)

For information on whether and how the function is available in your
unit, please refer to the type-specific instructions.
Connection: to XGM1; 12-pole,
2-row.
Mating connector is comprised in the delivery.
Cable length: max. 50 m at 0.5 mm
max. 100 m at 0.75 mm
Cable type: shielded
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 complete a running welding process.
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.
XGM1
4
Transformer temperature
5
Transformer temperature
6
Shield
Fig. 55: 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:
XGM1
4
Transformer temperature
5
Transformer temperature
Fig. 56: Transformer temperature not monitored by timer
PRC7000 |
2
2
Welding transformer
Temperature contact
D
Jumper
R911172834 / 02