24  1200C-2000C Fire Alarm Control Panel, Repeater, and Black Box Installation Manual 
Connecting the batteries 
The control panel requires two 12V, 7 to 45 Ah rechargeable sealed lead-acid 
batteries (see table below).  
Batteries must be installed in series using the bridge provided and connected to the 
BAT CH terminals on the PS1200N power supply interface (see Figure 15 on page 17). 
Polarity must be observed. No other equipment may be connected to the battery 
terminals. 
Table 4: Battery and battery installation 
Battery Battery location 
12V - 7 Ah  Batteries are installed inside the control panel cabinet 
12V - 7.2 Ah  Batteries are installed inside the control panel cabinet 
12V - 12 Ah  Batteries are installed inside the control panel cabinet 
12V - 17 Ah  Batteries are installed inside the control panel cabinet 
12V - 18 Ah  Batteries are installed inside the control panel cabinet 
12V - 24 Ah  Batteries must be installed externally 
12V - 26 Ah  Batteries must be installed externally 
12V - 45 Ah  Batteries must be installed externally 
Note: 45 Ah batteries may not be used with FP1200C, FR1200, or FR2000 panels. 
 
Once batteries are installed, the battery type must be set using the battery selection 
DIP switch. See “Charging batteries” below.  
Charging batteries 
In accordance with EN 54-4, installed batteries may be charged by the control panel. 
To ensure correct charging, the type of battery used must be set using the battery 
selection DIP switch on the PS1200N (see Figure 16 on page 18). DIP switch settings 
are shown in the table below. 
Caution: Selecting an incorrect charge rate may damage batteries. 
Table 5: Battery selection DIP switch configuration 
1  2  3  4  Battery type  Charge rate at 27.3 VDC 
OFF  OFF  OFF  ON  7 and 7.2 Ah  0.5 A 
OFF  OFF  ON  OFF  12, 17, and 18 Ah  1 A 
OFF  ON  OFF  OFF  24 and 26 Ah  1.5 A 
ON  OFF OFF OFF 45 Ah  3 A 
Note: If more than one DIP switch is ON the lowest charging rate will be used. 
 
If the control panel indicates a Battery Test Fail error, then the batteries may need to 
be replaced. For more information see “Battery maintenance” on page 31. For battery 
life calculations see “Battery capacity calculation” on page 34.