BECKHOFF CB3053 - Manual (Page 16)

Chapter: Connectors Power Supply
page 16 Beckhoff New Automation Technology CB3053
4.2 Power Supply
The power supply of the hardware module is realized via an 8pin connector (Weidmüller 180537-0000).
The main 24V power lines are assigned to pins 5 and 6. An external Pb-battery can be connected to pins
1 and 2 to provide UPS functionality. Contact your sales person to discuss suitable battery packs.
Pin 3 (UPS_OUT) is a 24V output (max. 2A), which is supported by the UPS (Pb-accu or capacitors) in
the event of a power failure. One possible application would be to use this output to supply a display
device which would then be able to display information about the power failure and the pending system
shutdown.
If a UPS is present you need to have a possibility to shutdown the board in a regular way without
activating the UPS, thereby preventing premature aging of UPS components. That's what pin 7
(PC_ON#) is for. When pulled high (24V) a regular shutdown without UPS activity is triggered. As a part
of this regular shutdown pins 3 (UPS_OUT) and 8 (Power Status) are pulled from 24V to 0V. Any devices
connected to UPS_OUT will thus also be switched off without discharging the UPS.
pinout power connector:
Pin Name Description
1 BATT24V# Pb-accu 24V -
2 BATT24V Pb-accu 24V +
3 UPS_OUT UPS outgoing supply 24V
4 GND ground
5 24V# power supply 24V -
6 24V power supply 24V +
7 PC_ON# power on
8 PWRSTAT power status