
Section 18 – Final Power-Up Procedure
18-5
Battery Calculation Worksheet
Capacity Formula Calculated Value
Standby Capacity total standby load X 4 hours X 1.4 contingency factor
OR
total standby load X 24 hours X 1.1 contingency
factor (use total standby load from previous
worksheet)
Alarm Capacity total alarm load X 0.067 hours (4 minutes) (use total
alarm load from previous worksheet)
Total Capacity Add standby and alarm capacities
Connecting The Battery
In the event of an AC power loss, the control panel will still operate for a period of time (time
period varies depending on size of battery used) because the control has a backup,
rechargeable gel type (sealed) lead acid battery. YUASA batteries are recommended.
DO NOT
use Gates batteries (sealed lead-acid type). These batteries require a different
charging voltage than is supplied by the panel.
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 will cause a battery
test to be initiated. The VISTA-128B will also run a 5-second battery test every 60 seconds to
check if the battery is connected.
Use the Battery Selection Table to select the appropriate battery for the installation.
U
L
The VISTA-128B must operate for at least 4 hours following an AC power loss in certificated
burglary installations. Select a battery size from the table below that will support the
standby current draw for 4 or more hours.
Battery Selection Table
The cabinet supplied with the control can house up to 12VDC, 14AH batteries (two 12VDC,
7AH batteries wired in parallel). The VISTA-ULKT provides a cabinet that can house up to
12VDC, 17.2AH batteries that may be used with this control. The total standby current
drawn from auxiliary power and the polling loop outputs combined must be limited to 270mA
when 14AH batteries are used; and to 390mA when 17.2AH batteries are used.
Using the total
calculated from the
Battery Calculation
Worksheet, select the
appropriate battery.
4 AH Yuasa NP4-12
7 AH Yuasa NP7-12
12 AH Yuasa NP12-12
14 AH Yuasa NP7-12 (connect 2 in parallel)
17.2 AH Yuasa NPG18-12
(The following batteries will fit inside the VISTA-128B cabinet)
Connect the battery as shown in
Figure 18-1.
Do not connect the battery until all
devices have been wired to the control.
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