B&R Automation PC 620 - Supply Voltage for the 5 PC600.SX02-00 Revision < H0 and 5 PC600.SX02-01 Revision < K0

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Technical data • Entire device
Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
2.8.4 Supply voltage for the 5PC600.SX02-00 revision < H0 and 5PC600.SX02-01 revision
< K0
The following block diagram presents the simplified structure of the APC620 supply voltage for
system units 5PC600.SX02-00 (revision < H0 and higher), 5PC600.SX02-01 (revision < K0 and
higher).
Explanation:
The supply voltage is converted to 15 V with a DC/DC converter. These electrically isolated 15
volts feed two further DC/DC converters. One generates +12 V, and the other 3V3 and 5V
standby.
After the system is turned on (e.g. using the power button), the voltages 3V3, 5 V, +12 V are
placed on the bus. At the 5 V output, yet another DC/DC converter generates -12 V, and places
these on the bus.
The optional APC620 add-on UPS and battery unit is supplied with 15 V and provides an
uninterrupted power supply from the 15 V bus during power failures.
Figure 28: Supply voltage for the 2 PCI slots (dependent on system unit version)
24V
15V
Supply voltage
+24 VDC
Buffering capacitors
(for min. 10 ms)
3V3 standby
3V3
3V3
5V
15V
+12V
+12V
5V
5V
15V
Power on
15V
-12V
-12V
5V Standby
electrically
isolated
UPS battery
Add-on UPS
module (optional)