B&R Automation PC 620, User Manual

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Technical data • Entire device
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83 Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
2.8 Power management APC620 system units with 2 PCI slots
2.8.1 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
V feed four further DC/DC converters, which generate the remaining voltages.
After the system is turned on (e.g. using the power button), the voltages 3V3 and 5 V are placed
on the bus. Two additional DC/DC converters at the 5 V output generate
-12 V and -12 V, which is then applied to 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 27: Supply voltage for the 2 PCI slots (dependent on system unit version)
24V 15V
Supply voltage
+24 VDC
Buffering capacitors
(for min. 10 ms)
electrically
isolated
3V3 Standby
3V3
3V3
5V
15V
+12V
+12V
5V
5V
15V
Power On
5V
-12V
-12V
5V Standby
UPS battery
Add-on UPS
module (optional)
+12V
PCI bus