Beckhoff C5240 Manual page 29

Data loss due to switching off the power supply when the UPS battery is empty
Switching off the power supply when the UPS battery is empty can lead to data loss, as the operating
system cannot be shut down properly without battery power.
• Make sure that the UPS battery is charged in case of emergency.
• For UPS C9900-P209 and C9900-U209, charge the battery exclusively via the switched-on PC. Never
connect a charger.
Shortened battery life due to switching off the power supply
If the power supply is simply switched off, the operating system shuts down via the battery. With daily use,
this significantly shortens the life of the battery.
• Avoid switching off the power supply before shutting down the operating system.
• Use the PC-ON input (see the following description) to shut down the operating system in a battery-
friendly manner.
Switch on and off with 100-240 V power supply unit
The industrial PC is started or switched off when the system is switched on or off or when the power supply
to the industrial PC is connected or disconnected. Behind the front flap of the industrial PC there is an ATX
push button. You can use it to control the startup and shutdown of the operating system. If you press the
ATX push button briefly while the Windows operating system is running, the operating system shuts down.
You can switch off the supply voltage after shutdown or restart the PC by pressing the ATX push button
again.
You can restart the device via the reset button behind the front flap of the industrial PC. Without shutting
down the operating system in advance, there is a risk of data loss.
If you have ordered your industrial PC with a 110 V or 230 V UPS, this enables data backup in the event of a
sudden switch-off of the device. If the power supply or the system is switched off before you have shut down
the operating system properly, the operating system shuts down using the battery. Data can be saved. With
frequent use, this shortens the life of the battery.
Switching on and off with 24 V power supply unit without UPS
If you have ordered your industrial PC with a 24 V power supply unit without integrated UPS instead of a
100-240 V power supply unit, the industrial PC has a power supply socket (X101) and a socket for external
wiring (X102). The socket for external wiring contains an input PC-ON and an output Power Status.
You can use the PC-ON input to control the startup and shutdown of the operating system as an alternative
to the ATX push button. The PC-ON signal is inverted, which is why the operating system boots up at 0 V at
the input and shuts down at 24 V. During operation, 0 V must therefore be permanently applied to the input.
If you want to shut down the operating system, you must apply 24 V to the PC-ON input. Once the operating
system has shut down, the PC power supply unit sets the Power Status output from 24 V to 0 V. This
indicates that the shutdown is complete and you can turn off the power supply. You can then switch off the
power supply. If you remove the 24 V from the PC-ON input before you have switched off the power supply,
the operating system restarts. Therefore, 24 V must be applied to the input until you have switched off the
power supply.
Besides the main switch of the machine, you can also install an additional ON/OFF switch to turn the
machine on and off. The main switch can thus remain switched on in principle and thus ensures that the PC
is still supplied with power during the shutdown of the operating system. Via the Power Status output, you
can switch, for example, a contactor that switches off the entire system. The load capacity of the Power
Status output is limited to max. 0.5 A. No fuse protection is required.
You can use the UPS output to supply another device, such as a control panel as an operating element. If
the power supply fails without a UPS, both the industrial PC and devices supplied via the UPS output are
switched off directly.
C5240
NOTICE
NOTICE
Version: 3.0
Commissioning
29