January 2012 3.6 Supply Voltages in the HSCI System 197
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 pro-
tective ground must be realized over the 0 V connections. The respective out-
ward 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 con-
nected 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 trans-
former of the inverter system.
If the line voltage is 3 x 480 V~ and inverters suitable for this voltage (UE com-
pact 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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