July 2013 3.8 Supply voltages in the HSCI system 241
It is possible to connect both 24 V output voltages of the PSL 13x in parallel.
In this way the PSL supplies only a maximum output power of 750 W, which
fulfills the requirements for PELV according to EN 61800-5-1. However,
because of the parallel circuit, a PSL 130 supplies only an output voltage of
+24 V, which can then be used as desired for the 24 V NC voltage or the
24 V PLC voltage. An additional PSL 13x can be used for the respective other
voltage.
U
Z
DC-link current Since the power to the PSL 130 is supplied through the DC-link, the voltage
fed into the DC-link by the motors that are still running can be used during line
voltage failures. The PSL 130 uses the supply voltage buffered via the DC-link
to maintain the power supply for the control until the non-HEIDENHAIN
inverter system has been shut down properly by the control.
If the PSL is connected over litz wires instead of the DC-link conductor bars, a
wire cross section of at least 1.5 mm
2
must be used. Fuses or a motor
protection switch of 6.3 A or greater for conductor protection must be
selected depending on the wire cross section used. The PSL 130 is protected
internally by a fuse (4 A).
HEIDENHAIN offers insulated conductor bars if you want to position the PSL
130 next to the left of the UVR inverter and connect it to the DC-link via
conductor bars. Two conductor bars are required for each connection. The
conductor bars are shipped in packaging units. Also, this position makes it
possible to connect the grounding conductor of the PSL via conductor bars.
Therefore, angulated non-insulated conductor bars are also included in this
packaging unit. This makes it possible to continue using the straight conductor
bar included with the UVR for the grounding conductor connection from the
UVR to the inverters via the right side.
When using it to supply the PLC, the common 0 V signal must be
connected by a 6 mm
2
conductor to the machine's central ground.
Connecting
terminals
Assignment
–U
Z
DC-link voltage –
+U
Z
DC-link voltage +
Length For connection to ID (conductor bar set)
150 mm UVR 120D/130D 687669-01
200 mm UVR 140D/150D 687670-01
250 mm UVR 160D/160DW 687671-01
Tightening torque for the screws of the DC-link conductor bars = 3.5 Nm.
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