I n s t a l l a t i o n & P r o g r a m m i n g M a n u a l
76
Figure 4-14 BBU to 206 / 208 system connection diagram
1. First disconnect the telephone system from the mains power outlet and ensure that the battery
back up unit is NOT connected to the 220-240 volt supply.
2. Ensure the 4-pin socket with the red, blue, white and black leads is connected to plug J4 on the
BBU.
3. Remove the cord bushing/grommet, which secures the mains cable to the back of the system
case and remove the mains connector from socket SK1 (206) or SK41 (208).
4. Remove the cover of the battery back up unit and proceed to install the batteries. Place the
batteries on their side with the terminals facing the side of the case, as shown in Figure 4-14.
5. Using the short red cable with two spade connectors, connect the positive terminal (+) of the
left-hand battery to the negative (-) terminal of the right hand battery.
6. Connect the spade connector on the red wire of the long lead to the remaining positive battery
terminal and the spade connector on the black wire to the negative battery terminal. The other
end of this lead with the 2-pin socket with red and black wires should be connected to plug J3
on the BBU.
7. Connect the 2 pin socket with the single wire to the matching 4 pin plug marked SK3 (206)or
SK27 (208) on the telephone system main board. Ensure that the single wire is connected to pin
2 of the connector, as shown in Figure 4-14.
8. Thread the external cable from the battery unit through the cable entry at the rear of the
telephone system case, where the 220-240 volt cable was removed.
9. Connect the 3-pin socket to the matching connector pins marked BBU/Ring (206) or BBU
SK22 (208) on the telephone system main board.
10. Close the lid of the system and Battery unit and plug the battery unit into the 220-240 volt
mains outlet.
The green led on the front case of the telephone system will light to indicate it is receiving power.
After the batteries are charged (approx. 4 to 5 hours) then the system will run without mains power
for between 1 and 3 hours depending on the usage of the system and the number and duration of
extensions ringing.
When the system is running on battery the internal red led only is lit and when the 220-240 volt
power is operating then both the red and green LED’s on the battery back up unit are lit.
Important!
PABX power
cable grommet
fits here
PABX Power cable
socket re-
connects here
+
-
Kickstart contacts
Green LED –
Mains power ok
Battery connector
+
- +
-
Batteries
Black
SK3 (206)
SK27 (208)
BBU (206)
SK22 (208)
BBU cable entry grommet
Connect white 3
wire connector
to plug
1 2 3 4
Connect 2
pin socket
with single
wire to pin 2
PABX
Battery Back-up Unit
Blue
Red LED –
System using
Battery power
Red
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