Product overview
CP27xx16 Version: 2.0
3.2.4 Power supply
The panel PC is supplied with a nominal voltage of 24V. The power supply and the protective earth of the
device are connected via the 8-pin voltage socket (X110). The main supply voltage is applied between PIN 5
(0V) and PIN 6 (24V) of the socket. If the panel PC is equipped with an integrated uninterruptible power
supply (UPS), an external battery pack can additionally be connected to PIN1 and PIN2. Beckhoff offers the
C9900-U330 and C9900-U332 battery packs for this purpose.
Fig.8: CP27xx_voltage socket pin numbering
Table7: Voltage socket pin assignment
Pin Signal Description
1 - BAT Negative pole of the battery pack
2 + BAT Positive pole of the battery pack
3 27 V UPS 27V UPS output 2.5A, negative is pin1 "- BAT"
4 Protective earth
5 - 24V supply voltage, negative pole
6 + 24V 24V supply voltage, positive pole
7 PC-ON Input PC-ON
8 P-S Power Status output, minus is the negative pole of the supply voltage
The plug for the power supply is specified for 16A and can accommodate wire cross-sections of up to
1.5mm
2
. For long supply lines, use 1.5 mm
2
cables to achieve a low voltage drop on the supply line. At least
22V should be present at the voltage connector of the panel PC so that the PC remains switched on in the
event of voltage fluctuations. The plug is included in the delivery. You can obtain a replacement plug from
your Beckhoff Sales using the following ordering option:
• C9900-P926: power supply connector for CP27xx Panel PC