Determining The Size Of The Standby Battery - Honeywell VISTA-128FBPN Installation And Setup Manual

The total control panel standby load must be
limited to 919mA for 24-hour standby time using
two 12V, 17.2AH batteries connected the Power
supply. If you are using a Commercial Fire
Listed 24VDC Power Supply use the worksheet
supplied with the power supply to determine the
correct battery size.
Determining the Size of the Standby
Battery
For burglary installations requiring 4-hour standby
time followed by 15-minutes alarm time, use a 12AH
battery to support all loads up to and including the
maximum system load (e.g., 1.3A standby/2.8A alarm
total control panel load). For fire installations requiring
24-hour standby time, use the worksheet below to
calculate the required battery capacity.
DO NOT use Gates batteries (sealed lead-acid

type). These batteries require a different
charging voltage than is supplied by the panel.
Use Worksheet 7 to determine the required backup
battery capacity and use The Battery Selection Table to
determine the battery model number. A dual battery
harness is supplied that allows two batteries to be
wired in parallel for increased capacity.
Using the total calculated from Worksheet 6, calculate
the battery capacity required for the installation.
Section 3 - Installing the Control
Worksheet 7: Battery Capacity Calculation Worksheet
Capacity Formula
Total standby current X 24 hours
Standby
X 1.1 contingency factor.
Capacity
Total alarm curr. X 0.083 (5 min)
Alarm
or X 0.250 (15 min)
Capacity
Total Add standby and alarm
Capacity capacities
Use the Battery Selection Table to select the
appropriate battery for the installation.
Battery Selection Table
Capacity Recommended Battery
4AH Yuasa NP4-12
7AH Yuasa NP7-12
12AH Yuasa NP12-12
14AH Yuasa NP7-12
17.2AH Yuasa NPG18-12
Connect the battery, referring to Figure 3-25.
The standby battery is automatically tested for
10 minutes every 4 hours, beginning 4 hours
after exiting Programming mode. In addition,
entry into the Test mode initiates a battery test.
The VISTA-128FBPN also runs a 5-second
battery test every 60 seconds to check if the
battery is connected.
Calculated
Value
Comment
Fits in large
mercantile
cabinet only.
Connect two
in parallel.
Fits in large
mercantile
cabinet only.
3-29