VIPA System 300V - Page 48

Chapter 3 Hardware description Manual VIPA System 300V
3-22 HB130E - CPU - Rev. 11/50
The CPU has an integrated power supply. The power supply has to be
provided with DC 24V (20,4 ... 28,8V). For this serves the double DC 24V
slot, that is underneath the flap.
Due to the double slot you may directly deduct DC 24V from the not used
connection pair for front provided modules.
Via the power supply not only the internal electronic is provided with
voltage, but by means of the backplane bus also the connected
System 300V modules.
The internal power supply may be strained with maximum 3.5A.
The internal electronic is galvanically connected with the supply voltage.
The power supply is protected against polarity inversion and overvoltage.
A rechargeable battery is installed on every CPU 31x to safeguard the
contents of the RAM when power is removed. This battery is also used to
buffer the internal clock.
The rechargeable battery is maintained by a charging circuit that receives
its power from the internal power supply and that maintain the clock and
RAM for a max. period of 30 days.
With the operating mode switch you may switch the CPU between STOP
and RUN. The operating mode START is driven automatically from the
CPU between STOP and RUN.
Placing the switch to Memory Reset (MRES), you request an overall reset.
Power supply
Battery backup for
clock and RAM
Operating mode
switch
RUN/STOP/MRES
X1
PS
+
-
+
-
DC 24V