4466 EXTERNAL POWER SUPPLY
- FIRE ALARM SOLUTIONS TECHNICAL DESCRIPTION
10
4.4.2.
BATTERY PARAMETERS
Ri max
0.7 Ω
UB min (final voltage)
21.0 V
Deep discharge protection
19.0 V
4.4.3.
CHARGING MODE
When batteries with capacity > 16 Ah are used, High current charging mode has to be used (if EN54-4 shall be fulfilled).
Minimum charging current x 24h x 80% = 18Ah, but 10% security margin is required.
For batteries 12 Ah and below, it is recommended to use the low current charging mode
See the following table:
Charging mode
Jumper JP1
Battery capacity (Ah)
Imax a (IOut0 + IOut1) 24 V DC output
Continuous current takeout (A)
Low current
Open
≤ 12
≤ 3.0
High current
Shunted
≤ 42
≤ 1.5
Jumper JP1 is situated on the charger board. The charger board has to be out of power when shunting JP1. Shut the power of by
removing both F1 and F2.
1. Charger board 4467
2. Jumper JP1
Using the high current charging mode results in a "low" continuous current consumption on the 24 V DC
output and vice versa.
A fire alarm in the system will automatically allow a total output current up to 4.0 A.
