9
S8T-DCBU-01
S8T-DCBU-01
Battery Status Indicator / Battery Status Output
The operator is notified of an abnormality as follows when an
abnormality ((1) to (4) below) occurs during battery discharging:
If a power failure occurs in the following states, backup operation
is not performed and/or the backup time is shortened.
Immediately eliminate the cause of the abnormality.
1.
The voltage at the Battery Connector terminal is 22.5 V or less.
2.
The battery misconnection protection function is activated.
3.
The backup ON/OFF input terminal is open.
4.
Overcurrent status during normal operation
Note:
The relay contact capacity is 24 VDC, 0.1 A.
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Replacing Batteries
The service life of the seal-type lead battery in use is limited. Use
of the battery beyond its replacement cycle may, in the worst
instance, cause fire. To prevent accidents in the worst instance,
we recommend periodically replacing the battery.
Note:
1.
Battery performance rapidly deteriorates as it
approaches the end of its service life.
2.
The battery life is specified as half of the battery's initial
capacity.
3.
The service life is shortened depending on its storage
a n d o p e r a t i n g e n v i r o n m e n t s a n d t h e b a c k u p
frequency.
4.
When disposing of or collecting batteries for recycling,
observe local bylaws and regulations.
1.
Replacement Guideline
Replace the battery using the following table as a guideline:
Note:
Values in the above table are calculated assuming that a
backup is performed using a charge voltage of 27.4 V,
discharge of 8 A (LC-P123R4J) or 3.7 A (LC-P122R2J)
once every month.
2.
Measuring Backup Time
The backup time can be measured by the procedure below. When
the battery is new, first measure the initial backup time value.
Replace the battery if backup operation is not performed for the
required backup time during periodic maintenance or the backup
time has fallen below the half or less of initial value.
Note:
1.
Make sure that at least 48 hours has elapsed since the
previous backup operation, and that the battery is
correctly connected, and then measure the backup
time.
2.
Measure the backup time after making sure that no
problems will occur as a result of stopping power
supply.
(1) Turn the AC power line OFF, and back up the S8T-DCBU-01.
(2) Measure the time that the battery status output relay turns to
LOW ((4)-(5): ON) after the operation mode output relay is
backed up ((1)-(2): ON). (This is the backup time.)
(3) When the battery status output relay turns LOW ((4)-(5): ON),
turn the AC power line ON.
Periodic Inspecting the Battery
We recommend periodically inspecting the battery as follows:
• Check the battery voltage. (In a 27.4 V series connection, make
sure that each battery is charged to 13.7 V.)
• Check battery wiring and connections. (Check the batteries and
S8T-DCBU-01 connections for loose screws.)
• Make sure that backup operation is performed normally in a
simulated power failure state.
Note:
Check the backup operation after making sure that no
problems will occur as a result of stopping power supply.
Battery
Ambient
temperature
Service life of
the battery
Replacement
guideline
LC-P122R2J
LC-P123R4J
20 ºC
4 to 6 years
4 years
30 ºC
2 to 3 years
2 years
40 ºC
1 to 2 years
1 year
COM
OK
LOW
LED lit
(BAT LOW: Red)
Relay (BAT LOW)
(4)-(5): ON
Battery status
output relay
Indicator
4
5
6
Backup time
22.5 V (typical)
AC input
Output voltage of the
S8TS-06024
Output voltage of the
S8T-DCBU-01
Battery voltage
Backup
((1)-(2))
Operation
mode output
Normal
((3)-(2))
LOW
((4)-(5))
Battery
status output
OK
((6)-(5))
