B&R Automation PC 620 - Power Management APC620 System Units with 5 PCI Slots; Supply Voltage for the 5 PC600.SX05-00 (Revision >= H0) and 5 PC600.SX05-01; (Revision >= H0)

Technical data • Entire device
Section 2
Technical data
91Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
2.10 Power management APC620 system units with 5 PCI slots
2.10.1 Supply voltage for the 5PC600.SX05-00 (revision >= H0) and 5PC600.SX05-01
(revision >= H0)
The following block diagram presents the simplified structure of the APC620 supply voltage for
system units 5PC600.SX05-00 (Revision H0), 5PC600.SX05-01 (Revision H0).
Explanation:
Systems with 5 PCI slots have an additional power supply for the PCI buses and the slide-in
drive. 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 5 V for an additional DC/DC
converter, which produces +12 V and +12V PCI bus voltage. The other DC/DC converter
produces 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 30: Supply voltage for the 5 PCI slots (dependent on system unit version)
24V
15V
Supply voltage
+24 VDC
Buffering capacitors
(for at least10 ms)
3V3 Standby
3V3
3V3
5V
15V
+12V
+12V
5V
15V
Power On
5V
5V Standby
electrically
isolated
3V3 PCI bus
3V3
5V PCI bus and slide-in
+12V PCI bus
5V
5V
15V
-12V
-12V PCI bus
PCI bus and slide-in power supply
UPS battery
Add-on UPS
module (optional)