Beckhoff C9900-U330, Manual

Page: 13 / 26

Commissioning
C9900-U330 13 Version: 3.0
4.4 Connect battery pack
CAUTION
Risk of electric shock
Dangerous touch voltages can lead to electric shock. To avoid electric shock, observe the following:
• Never plug or unplug the battery pack cable during a thunderstorm.
• Provide protective earthing for handling the battery pack.
NOTE
Incorrect connection procedure
Incorrect procedure when connecting the cable can cause hardware damage.
• Follow the documented procedure for connecting the cable.
• Always connect the cable first and only then switch on the power supply of the connected PC.
After you have mounted the battery pack in the control cabinet, you can connect it to the PC.
Grounding
Potential differences are minimized and electrical currents are diverted to the ground through protective
earthing or potential equalization of electronic devices. This is to prevent dangerous touch voltages and
electromagnetic interference.
Connecting the battery pack
You must connect the battery pack to the PC. For this purpose, there is a 5-pin 2-wire terminal strip with
mounting flange on the battery pack housing (see Fig. 6).
1
5
Fig. 6: C9900-U330_position terminal strip
Table 3: Pin assignment terminal strip
Pin Function
1 - 24 V battery pack
2 +
3
4 0 V Power supply
5 24 V
You can connect two wires on each side of a terminal of the terminal strip. For this purpose, you must use
double wire end sleeves (see Fig. 7).
Fig. 7: C9900-U330_double wire end sleeve
PIN 4 and 5 of the battery pack are available for looping through a 24 V power supply to the PC. Accordingly,
you can connect a three-core sheathed cable with plus and minus of the supply voltage as well as protective
earth to the battery pack and then connect the battery pack to the PC with a five-core sheathed cable.