Master Slave Operation; Table 22: Examples: Attainable Welding Peak Currents - Bosch Rexroth PSI 6 Series Operating Instructions Manual

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Extension and conversion
13.3

Master slave operation

Table 22: Examples: attainable welding peak currents
Ap- Type: Max. inverter
plica- PSI output current
tion 6500.xxx
Weld .190
Weld .190
Projec-
.000
tion or
.100
spot
Projec-
.000
tion or
.100
spot
The types PSI 6500.xxx of the PS 6000 series are provided with the
"master‐slave mode" functionality.
Features of the master‐slave mode:
• Synchronization of up to 3 PSI 6500.xxx of the same type, for increa­
sing the welding capacity. In this process, welding currents of max.
360 kA can be achieved with transformers with a transmission of n =
50.
• Automatic control of all slaves by the master.
• An "error reset" at the master (via the user interface or by means of
the Reset button on the front panel) also causes an automatic "error
reset" at the slaves.
• Hence, assemblies for I/O and programming connection are only re­
quired for the master, if necessary for the application.
• Easy parameterization. Only one unit in the network is parameteri­
zed via the user interface (as master with 1 or 2 slaves; BOS: „Pro­
gramming" topic, „Thyristor unit parameter" tab).
Units that are coupled to the master via the master-slave connection
cable are automatically parameterized as slaves and accept all rele­
vant parameters from the master (e.g. transformer parameters, etc.).
• Identical basic hardware for master and slave.
PSG number per
unit (transformer
per unit transmission)
1x12−V trans-
1 kA former
(n = 38)
1x9−V transformer
1 kA
(n = 50)
3 x PSG 3200
2.4 kA
(n = 38)
4 x PSG 3100
2.4 kA
(n = 50)
For dimensions, line connection, cooling or welding capacities of the
individual units, please refer to the corresponding sections.in the
present manual.
PSI 6xxx |
Max. secondary peak
current per unit
38 kA
(permanent current:
max. 25 kA)
50 kA
(permanent current:
max. 33 kA)
91 kA
(with a secondary resistance
of 85 μohms)
120 kA
(with a secondary resistance
of 28 μohms)
1070080028 / 08
Max. possible welding
peak current with
1 slave 2 slaves
approx. approx.
76 kA 114 kA
approx. approx.
100 kA 150 kA
approx. approx.
180 kA 270 kA
approx. approx.
240 kA 360 kA