Tyco F3200 - Manual (Page 57)

Document No: LT0122 F3200 Installation & Programming Manual
Configuring a FIP
Issue 2.7 5 July 2001 Page 5-3
5.3 BATTERY & POWER SUPPLY
5.3.1 GENERAL
The F3200 FIP has a dc power supply, which also serves as battery charger and requires a
24V sealed lead acid battery (i.e. 2 x 12V batteries in series) to be fitted. (See Section 3.3.3
for compatible batteries). Battery leads with 4.8mm Quick Connect receptacles (for
connecting to the battery tabs) are included.
Charger Rating (Refer to AS1670.1 Section 8.2)
The standard F3200 has a 3A power supply. Versions are also available with a 6A PSU.
This has a second mains transformer, a 3A rectifier pcb and a larger heatsink connected to
the MAF/PSU. Several components on the pcb are also upgraded.
When a 6A power supply is fitted, the standard PTC on the MAF/PSU are shorted out and
additional battery protection must be fitted (see Section 5.3.6).
To comply with AS1670.1 the power supply rating must be sufficient to charge the batteries
while powering the panel with 2 zones in alarm. This must include all remaining quiescent
loads, common alarm load, plus 2 (or 20%, whichever is the larger) of all connected fire
suppression systems in the active state (i.e. solenoids, warning signs, etc).
The definition of charging the batteries is supplying enough current to charge them within 24
hours to provide a capacity that will support 5 hours of FIP quiescent load (i.e. with mains
off) followed by 0.5 hour of alarm load for two worst-case zones.
The recommended order of performing calculations is listed in Section 5.3.2.
Battery Rating (Refer to AS1670-1 Section 8.2).
The battery capacity must be sufficient to support 24 hours of quiescent load (i.e. with mains
off), followed by 0.5 hour of alarm for the two worst case zones.
Notes
1. The quiescent load includes the FIP electronics (in normal state) plus any external
normally energised loads that operate from the battery backed supply. Hence door
holders are normally supplied from a non-battery backed supply.
2. Alarm load includes FIP electronics (in alarm state) plus any external loads such as
bells, air conditioning shutdown relays, etc, plus the 2 (or 20%) fire suppression
zones.
3. The capacity of a battery depends on the rate (i.e. current) at which it is discharged.
Most batteries are quoted at a 20 hours discharge e.g. a 10Ahr battery will supply
0.5A for 20 hours. At 3 times the current (i.e. 1.5A) the same battery will discharge in
typically 5.6 hours, i.e. the capacity is only 8.5Ahr. At 10 times the rate the capacity
is approximately 75% of the 20 hour rate capacity (i.e. 7.5Ahr). Hence for alarm
loads it is safest to derate the capacity to 75%.