18 – 250 HEIDENHAIN Service Manual iTNC 530 HSCI
18.4 PSL 135 low-voltage power supply unit
The PSL 135 power supply unit was especially designed to power HSCI components when
non-HEIDENHAIN inverters are used.
It provides three output voltages ...
... as well as the low voltages for the supply bus X69.
The two 24 V output voltages can also be connected in parallel and used as desired for NC or
PLC supply.
Further information and connector layouts --> See ”Connector designations and pin layouts” on page
28 – 453.
Power consumption: max. 1000 W
Internal protection: 4 A
LED display The operational status indicator is the green ON LED:
Output voltage of
PSL 135
Tolerance Insulation Output current
+24 V NC +/- 5 % Double insulation Max. 14.5 A
+24 V PLC Variations between 20 V and
28 V, depending on the load
Basic insulation Max. 20 A
+5 V +/- 5 % Max. 20 A
Power supply for PSL 135 Connection for PSL 135
power supply
HSCI components powered
by PSL 135
Phases L1 and L2
(400 Vac +/- 10%)
X31 MC 6222
MC 6241
MB 620
PLB 62xx
PLB 61xx
CC 61xx
DC-link voltage Uz
(400 V - 750 V)