Controlled Products Systems Group SWINGSMART DC 20 - Manual (Page 50)

Important Considerations for DC-powered Operators
2-12 SwingSmart DC Installation and Reference Manual Revision E
I
MPORTANT
C
ONSIDERATIONS FOR
DC-
POWERED
O
PERATORS
• Since the operator is intended to run on batteries, control of the load is important. Gates that move easily
and do not bind will drain less energy from the battery, preserving capacity for more cycles during a power
failure.
• Be certain to observe polarity when connecting the batteries or adding accessories. Reversed polarity may
result in a non-functional operator or damage to a component. Red (+) is positive and black (-) is negative.
If shorted, the batteries will generate a very high current. The batteries are connected in a series circuit:
Join the positive (+) terminal from one battery to the negative (-) terminal of the next battery.
• Batteries have a finite life and age more quickly when exposed to temperatures above 80°F (27°C). Battery
temperatures above 104°F (40°C) are damaging and significantly shorten battery life.
• As the batteries age, they will progressively lose their capacity to store energy. If the total amount of back
up capacity is critical, plan to replace the batteries after two years of use especially in hot climates. Properly
discard used batteries. Refer to
Hazardous Materials and Proper Disposal .
WARNING !
Batteries contain sulfuric acid. Acid in your eyes, on your skin, or on your clothing can cause
injury and severe burns. If batteries are dropped or damaged dispose of them properly.
• Batteries are rated to perform to capacity at certain temperatures. Variations in temperature affect
performance of the batteries. An example of amp hour performance is shown in Table 2-3. HySecurity
mounts the battery pack near the transformer to provide residual heat around the batteries which guards
against amp hour loss in colder climates.
• HySecurity uses a permanently sealed AGM-type battery which last much longer than wet cell batteries
and needs no maintenance over its life span. Batteries are protected from over discharge by a low voltage
sensing circuit. The charger circuit regulates to allow high charger output when the battery is partially
discharged. The charger circuit automatically reduces the output to near zero as the batteries become fully
charged.
NOTE
The SwingSmart operator stores all User and Installer Menu settings in non-volatile memory
(EEPROM). Configurations are saved if a power loss occurs and reinstated once power is
restored.
Table 2-3.
Amp Hour - Example of Battery Performance
Temperature Capacity
77°F (25°C) 100
32°F (0°C) 80
-22°F (-27°C) 50