Technical data • Entire device
Section 2
Technical data
79Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
2.7 Power management APC620 system unit with 1 PCI slot
2.7.1 Supply voltage for the 5PC600.SX01-00 revision >= I0
The following block diagram presents the simplified structure of the APC620 supply voltage for
5PC600.SX01-00 system units starting with revision I0.
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 25: Supply voltage for the 5PC600.SX01-00 revision >= I0
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
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