Transformer Temperature Monitoring (Xgm1); Fig. 28: Connection For Monitoring The Welding Transformer Temperature; Fig. 29: Transformer Temperature Not Monitored By Timer - Bosch Rexroth Simulator PRC 7000 Betriebsanleitung

R911344640 / 01 | Simulator PRC7000
7.2.8

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. 100 m (with recommended cable type)
Cable type: shielded, core area min. 0.75 mm
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. 28: 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. 29: Transformer temperature not monitored by timer

Bosch Rexroth AG
Welding transformer
Temperature contact
D
Jumper
209 / 256
Assembly
2