N93-586-84 Issue 04 AB Page 12 of 32 © Protec Fire Detection plc 2015
5.7 Connecting the Standby Batteries
The two standby batteries must be connected in series with the battery link provided. Observing
correct polarity (red lead to the positive of one battery and black lead to the negative of the other
battery) carefully push the spade connectors of the 3500 battery leads onto the battery terminals
(illustrated in figure 5.4).
Please note that at this point the 3500 will not power up until the mains supply is connected.
Figure 5.4 Standby battery connections
Observe polarity when
connecting the battery leads
BLACK battery lead
RED battery lead
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