Bosch Rexroth PST 6 0 Series, Operating Instructions Manual

Page: 266 / 330

1070080029 / 05 Bosch Rexroth AG Electric Drives
and Controls PST 6xx0 | | 266 /330
Assembly
7.2.5 24 V
DC
logic supply (X4, input)
Connection: to X4; STKK, grid 3.5 mm, 14-pole,
max. 1.5 mm
2
.
Mating connector is comprised in the delivery.
Cable length: (from power source to consumer)
max. 10 m at 0.75 mm
2
max. 75 m at 1.5 mm
2
Cable type: unshielded, VDE 0281, 0812 (e.g.: Ölflex)
The control logic must be supplied with 24 V
DC
.
X4
10
11
Timer
Power infeed for power supply
to the internal control logic
24 V
DC
0 V
Fig.34: Logic supply input of the timer
The voltage source to be used for supplying the timer is defined by the
other circuitry connected to X4.
Options:
• Supply by the unit's internal power generator (refer to page 267)
• Supply via an external power supply unit.
For this purpose, only a few jumpers have to be inserted/removed at X4.
For more information concerning the connections to X4, please refer
to Sect. 7.2.8 starting on page 269.
Whereas voltage supply by the unit's internal voltage generator is
preferably used in stand-alone systems (e.g. suspended systems, be­
cause no additional 24 V
DC
power supply units are required), external
power supply units are the preferred solution in networked systems
(timer can be programmed by the line PC even if the welding network is
switched off).
"
Any external voltage sources used must be designed according to
the principles of "safety separation" in accordance with the Low-Vol­
tage Directive (2006/95/EC).
ENGLISH