Rockwell Automation Publication 1606-RM008A-EN-P - November 2021 13
DC-UPS - 24V, 20 A, 480 W Reference Manual
Batteries and Battery
Charging
The battery is not included in the DC-UPS. Use one 24V battery modules (see
24V, 12AH Battery Module - 1606-XLSBATASSY3
on page 30 and 1606-
XLSBATASSY4 on page 30). In addition to the battery module, the 1606-
XLS480-UPS is also designed to be compatible with a large variety of different
VRLA (Valve Regulated Lead Acid) or SLA (Sealed Lead Acid) batteries from
various suppliers.
The battery is one of the most important parts of a DC-UPS system, which
must be carefully selected while also paying close attention to storage,
charging and environmental conditions. Select the proper size (capacity)
according to the required buffer time (see Buffer Time
on page 15) and the
lifetime requirements (see Battery Replacement Intervals
on page 31).
Batteries are service parts and must be replaced periodically or when the
internal battery tests of the DC-UPS report a random failure. Information
regarding the DC-UPS battery tests and the replacement requirements can be
found in Battery Replacement Intervals
on page 31
The wiring from the battery to the DC-UPS must follow the Installation
Instructions on page 6. The current from the battery to the DC-UPS can be
higher than the load current due to the buffer voltage transformation, which
restores the battery voltage to a constant buffer voltage.
The 1606-XLS480-UPS has a battery size selector included that allows an
optimal use of small and large battery sizes.
It is not recommended to connect multiple batteries or battery modules in
parallel. Choose larger sized battery instead.
Charging
The 1606-XLS480-UPS comprises a constant current / constant voltage (CC-
CV) charging method.
When the center-tap connection is installed, both 12V batteries are charged
individually with their own charger. The center-tap connection is optional and
if not installed, both batteries are charged with one common charging voltage.
The 1606-XLS480-UPS automatically recognizes if the center-tap connection is
present or not.
When charging is approximately 85% completed, the individual green “Ready”
light-emitting diode (LED) for the specific battery stops updating and is on
solid.
During charging, the DC-UPS consumes additional current from the input.
The supplying power supply must be able to deliver the additional required
internal current consumption (including the charging current) specified as
input current in the table in Input/Output
on page 9.
When the temperature sensor is installed, the end-of-charge-voltage is
temperature that is compensated. The 1606-XLS480-UPS automatically
recognizes if a temperature sensor is connected or not. In case no temperature
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