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2. INITIAL STEPS, OPERATING THE BACKER
a) Connections
First connect the receiver to the PowerBox Source using the patch leads supplied
in the set. If your receiver features an MPX high-current input, use the MPX/MPX
patch lead. If you have any vacant sockets, the second connection can be made
by connecting an MPX/JR patch lead to a servo socket on the receiver.
CAUTION: If your receiver is tted with an integral battery backer, connect
both sockets to the servo sockets; in this conguration the receiver’s battery
backer function is bypassed. Now connect the Sensor Switch to the appro-
priate socket on the backer. If your model is subject to severe vibration, we
recommend securing the ribbon cable at one additional point at least. If the
connector should fall out, this would have no effect on the backer’s switched
state, but it would prevent you switching it off.
The batteries can now be connected to the backer’s MPX inputs, taking care to
maintain correct polarity. We recommend the PowerPak 2.5X2 ECO or PRO,
or - for larger models - the PowerPak 5.0X2 ECO or PRO.
If you prefer to use other makes of battery, or packs you have prepared
yourself, please take particular care over polarity, as the regulator ICs will be
destroyed if you connect a battery with reversed polarity. In order to minimise
power losses we decided against providing reverse polarity protection. The +
symbol is visible on the case cover.