Basic Node
3.2.3.1 Power Supply
AMM 20p is power supplied by –48 V DC, connected to the PFU1 or via an
Interface Connection Field (ICF1). The power is distributed from the PFU1 to
the plug-in units, via the power bus in the backplane of the AMM.
The power system is made redundant using two PFU1s, utilizing the redundant
power bus.
The PSU DC/DC kit enables connection to +24 V DC power supply, see Section
7.2 on page 126. The ICF1 is not used in this installation alternative.
FAU1
PFU1
ICF1
+
_
+
_
+
_
+
_
FAU1
PFU1
Power supply with ICF1 Power supply without ICF1
+
_
+
_
External
Power
Supply
–48 V DC
External
Power
Supply
–48 V DC
6708
Figure 20 Power supply for AMM 20p
6709
–48 V DC
Fan alarm
Power
BR
Fault
Fan alarm
0V
PFU1
-48V DC
Figure 21 PFU1
PFU1 has one –48 V DC connector for external power supply and one
connector for import of alarms from FAU1, as the FAU1 is not connected to
the AMM backplane.
17
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
To Next Page
Loading...
