July 2013 3.8 Supply voltages in the HSCI system 245
Power connection
The 0 V line of the NC supply voltage must be connected separately to the
central grounding point of the machine (= central functional ground). The 0 V
NC voltage of the PSL 130 is therefore connected internally with the outward
conductor to signal ground (= central functional ground).
An outward connector to protective ground will not be available for the 0 V PLC
voltage until variant 03. With the variants up to and including variant 02, the 0
V PLC must be tapped at terminal X90.4 and led to the central protective
ground. In variant 03 and later variants, an outward connector at the PSL will
be available for connecting the 0 V PLC voltage, too.
With the PSL 135, the connections to the central functional ground and
protective ground must be realized over the 0 V connections. The respective
outward connections will not be available until later hardware variants of the
PSL 135.
If a suitable type of network (see Technical Manuals for Inverters and Motors)
is used, the inverter system from HEIDENHAIN and the PSL 13x are
connected to the main power line without an additional isolating transformer.
If an isolating transformer is required for the inverter system due to the type
of network, then the PSL 13x must also be powered via the isolating
transformer of the inverter system.
If the line voltage is 3 x 480 V~ and inverters suitable for this voltage (UE
compact inverters) are used, then the PSL 13x must be powered via an
additional autotransformer. The required output voltage of the
autotransformer is 400 V~ +0 % / –15 %.
Central protective earth (PE)
B
24 V NC/PLC supply
PELV according to
EN 60204-1:2006
Central functional earth (B)
400 V +/ 10 %
50 Hz
24V-NC
24V-PLC
PSL 13x
X90.1
L1
L2
X90.2
X90.3
X90.4
X31/X33
B
Connection between
central functional earth
and central
protective earth
6 mm
2
6 mm
2
0V-NC
0V-PLC
Fuse
DC link at PSL 130
6 mm
2
1
2
Turoidal core
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