S e c t i o n 4 - I n s t a l l a t i o n
77
To turn off the power feed to the telephone system while the system is running on battery it is
necessary to disconnect the batteries at connector J3.
N.B.
While the system is running on battery if, for some reason, the battery leads are
disconnected and then re-connected the system will not run unless the installation technician
shorts the two solder pads marked X1 and X2. This is also necessary if the unit is started up
using battery power only.
BBU 212 Systems
The 212 system uses an internal BBU expansion card. This is fitted between the transformer socket
and plug in position SK28 on the main board. A connector is provided to attach two external lead-
acid rechargeable batteries to a socket in the system case. . The BBU circuit will charge the batteries
under normal use, and switch to battery power automatically should power fail.
Fitting BBU card
Note: The BBU card may already be factory fitted, in which case the battery cables are supplied with
the system, and you may skip to the ‘Connecting Batteries’ section.
1. First disconnect the telephone system from the mains power outlet and ensure that the system
is powered down, the front LED will stop blinking.
2. Remove the MDF cover and main cover from the system.
3. Remove the lead from connector SK28, this is the connector between the transformer and the
main board.
4. Connect the lead from the transformer to the socket (X2) on the BBU card.
5. Connect the card to the main board connector SK28, apply pressure to the board to connect to
the socket, never press down on the components on the board.
6. Re-fit the mains system cover, then the MDF cover.
7. Power-up the system, should the LED on the case front not start blinking within 6 seconds,
remove the power immediately and check the card is seated correctly.
Connecting Batteries
Figure 4-15 - 616 Battery back-up connections
1. Two cables are supplied for connecting external batteries. Lead 1 comprises two spade terminal
sockets at one end, and a black 4-pin connector at the other. Connect the red connector to the
unconnected positive (+) terminal of one battery, and the blue connector to the unconnected
negative (-) terminal of the other battery. See Figure 4-15 for details.
2. Lead 2 is a short lead with a red spade terminal socket at one end, and a blue terminal socket at
the other. Connect the red end to the unconnected positive (+) terminal of one battery, and the
blue terminal to the remaining negative terminal of the second battery. See Figure 4-15 for
details.
3. There is no need to drop power. Connect the BBU connector (black 4-pin connector of lead 1)
to the BBU connector found at the top of the telephone system, next to the external music port.
There is no need to remove the cover, or drop power during this operation.
Important!
red connectors
blue connectors
lead acid batteries
BBU connector
(to PBX)
lead 1
lead 2
