B&R Industries Automation PC 620, User Manual

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Technical data • Entire device
Chapter 2
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Te
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63 Automation PC 620 User's Manual V 1.90
2.7 Power management, APC620 systems with 5 PCI slots
The following block diagram presents the simplified structure of the APC620 supply voltage for
system units 5PC600.SX05-00 and 5PC600.SX05-01.
Explanation:
Systems with 5 PCI slots have two additional power supplies for the PCI bus and the slide-in
drives.
The supply voltage is converted to 15 V with DC/DC converter. These electrically isolated 15 V
feed four further DC/DC converters. Two ge12 V, and the others generate 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.
Figure 18: Supply voltage block diagram 5 PCI slots
24V 15V
Supply voltage
+24 VDC
Buffering capacitors
(for min. 10 ms)
3V3 Standby
3V3
3V3
5V
15V
+12V
+12V
5V
15V
Power On
15V
5V Standby
electrically
isolated
3V3 PCI bus
3V3
5V PCI bus and slide-in
+12V
+12V PCI bus
5V
5V
15V
15V
-12V
-12V PCI bus
PCI bus and slide-in power supply