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The connection to the power input of that card is made from the batteries that feed the
exchange. There are also four alarm control outputs on the card, which are to be connected
to the outputs of the alarm card. Alongside these, outputs to drive alarm panel are also
available. The diagram below shows the connections to be made on the power card.
The alarm light connection must be made within the close vicinity of the exchange and the
distance must not exceed 20 meters.
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