Fundamentals On The Master-Slave Mode - Bosch Rexroth PSI 6500 Series Technical Information

1070087059 / 02 PSI 6500.xxx

Fundamentals on the Master-Slave Mode

2 Fundamentals on the Master-Slave Mode
Ap- Type: Max. inverter
plica- plica- PSI PSI output current 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 "ma-
ster-slave mode" functionality.
Features of the master-slave mode:
D 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.
D Automatic control of all slaves by the master.
D 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.
D Hence, assemblies for I/O and programming connection are only re-
quired for the master, if necessary for the application.
D Easy parameterization. Only one unit in the network is parameterized
via the user interface (as master with 1 or 2 slaves).
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.).
D Identical basic hardware for master and slave.
Examples: attainable welding peak currents
PSG number per
unit (transformer 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 manual of the power section
used (see page 1-1).
Electric Drives
and Controls
Max. secondary peak y p
current per unit t it
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)
Bosch Rexroth AG 2-1
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