Installation Instructions
14
6525
Connecting Power Supply
The external wiring consists of the connection of the power supply, the
battery pack (optional) and the connection of customised components for
shutting down the PC.
Cable Cross Sections
Note cable cross sections,
avoid voltage drop!
For the connection of the power supply, wiring with a cable-cross-section
of 1.5 mm
2
must be used.
With bigger distances between voltage source and PC, you take the
voltage drop as a function of the cable-cross-section as well as voltage
fluctuations of your distribution voltage into account, so that is secured that
the voltage doesn't fall under 22 V at the power supply.
Insert Fuse
The power supply must be protected with maximum 16 A.
Configuration for shutting down the PC
The connections for shutting down the Industrial PCs are established via
the
PC_ON
input and the
Power Status
output.
PC_ON and Power Status functions
•
If the
PC_ON
input is connected to 24 V via a switch, the PC shuts
down according to the rules. The PC_ON signal is inverted, i.e. the
PC shuts down if the 24 V connection is live.
•
If the
PC_ON
input is
NOT
connected by the user, the PC can be
booted in the familiar way by connecting the supply voltage and shut
down via the battery by switching off the supply voltage.
Warning
This procedure significantly reduces the service life of the rechargeable
battery and should therefore not be used.
•
Once the PC has shut down, the
Power Status
output is switched
from 24 V to 0 V. Via this output a signal lamp can be connected or a
contactor for de-energising the whole system. The maximum load for
the Power Status output is 0.5 A and a suitable fuse should be
provided.
UPS output
In order to maintain a screen display for the PC in the event of a power
failure, the power supply unit is equipped with a
UPS output
for connecting
a Control Panel. The maximum load for the output is 2.0 A.
UPS output function
•
The 24 V DC connection at the UPS output is live even after a power
failure. The maximum load is 2.0 A.
•
Once the PC has been de-energised via the UPS software, the
UPS
output
is switched to 0 V. Any connected panel is thus switched off,
and total discharge of the rechargeable battery is prevented.
