For technical specifications of the components described in this section, see
Note
There is a plug connector on the back and a socket connector on the front of each BBU. Also, there is a BBU
alignment pin on the back and an alignment hole on the front. When BBUs are plugged into each other, they
mate front to back. The plug connector engages with the socket connector, and the alignment pin with the
alignment hole. When you connect a second or third battery to a battery already installed, use the alignment
pin and hole to ensure correct battery position and align the battery connectors.
Figure 2: Rear of Battery Backup Unit
Description
Item
BBU Alignment Pin
1
BBU Interface Plug
2
Captive screws (6) for installing the BBU for stacking or installing BBUs inside the
BBU bracket of the BBU module
3
Installing Battery Backup Units
7
Installing Battery Backup Units
BBU Components