S8T-DCBU-01 Omron, S8T-DCBU-01 Datasheet - Page 17

• Manufacturer Part Number: S8T-DCBU-01
• Description: DC BACKUP BLOCK 24V 3.7/8A
• Manufacturer: Omron
• Series: S8TSr

Specifications of S8T-DCBU-01

• Accessory Type: DC Backup Block
• For Use With/related Products: S8TS Power Supplies
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: S8TDCBU01

Troubleshooting
This page lists the errors that may occur when the S8T-DCBU-01 is used, along with their probable causes and remedies.
Check the relevant item.
Installation
When checking
the performances
Refer to
Operation Check
on page 7 for
details.
When S8T-DCBU-
01 is used
When
S8T-DCBU-01 cannot be
connected.
The S8T-DCBU-01 output
indicator does not light in
operation check procedure,
step 2.
The connected S8TS-
06024@ does not operate in
operation check procedure,
step 2.
The battery status indicator
is lit even 10 seconds or
more after the power is
turned ON in operation
check procedure, step 3.
The backup operation is not
performed in operation
check procedure, step 5.
The backup state is not
returned to normal even
after the power is restored
from a power failure.
Output was cut during
backup operation.
Backup operation and
normal operation are
alternately repeated.
The battery status indicator
remains lit when a period of
24 hours has passed after
power has been applied.
Probable cause
The Bus Line Connector is provided with a
selector for preventing misconnection of 5 V
and 12 V specification of S8TS units. For this
reason, connection is not successful if different
specification units are installed.
The S8T-DCBU-01 operates by the output of
the S8TS-06024@. A probable cause is that the
Bus Line Connector is not connected as the
input voltage is connected by the Bus Line
Connector (provided).
A probable cause is that the S8T-DCBU-01 is
connected between S8TS-06024@ Basic
Blocks.
A probable cause is that the battery was
connected with the + and − polarities reversed.
A probable cause is that the battery voltage falls
below about 22.5 V. (Battery self-discharging or
the standby current of the S8T-DCBU-01 may
have caused discharging to continue.)
A probable cause is that the backup ON/OFF
input is open.
A probable cause is that the overload protection
has been triggered in the connected S8TS-
06024@.
A probable cause is that the overload protection
function selector switch on the S8T-DCBU-01 is
set low.
A probable cause is that the output voltage
adjuster (V. ADJ) of the connected S8TS-
06024@ is set lower than the factory-set
voltage.
A probable cause is that inrush current during
backup operation caused the fuse on the
battery to blow.
A probable cause is that a protection function
on the S8TS-06024@ was activated to stop
S8TS-06024@ operation.
A probable cause is that the overdischarge
protection function was activated by a battery
voltage dropping due to discharge.
A probable cause is that an overload state is
reached due to load fluctuations during backup
operation.
A probable cause is that one of the S8TS-
06024@s is out of order when two or more
S8TS-06024@s are connected.
A probable cause is that the S8TS-06024@ is in
an overload state due to load fluctuations
during normal operation.
A probable cause is that discharging continued
while the AC was turned OFF because of
battery self-discharging or standby current of
the S8T-DCBU-01.
Description
Set the selector on the Bus Line Connector
(provided) to 24 V.
Refer to S8T-BUS03 on page 7 for details.
Connect the S8T-DCBU-01 to S8TS-06024@
using the Bus Line Connector (provided).
Refer to Basic Configuration on page 2 for
details.
The S8T-BUS03 Bus Line Connector for
connecting the S8T-DCBU-01 is not connected
to the AC power line. Connect the S8T-DCBU-
01 to the left or right end of S8TS-06024@ Basic
Blocks.
Connect the battery correctly.
Refer to Incorrect Battery Connection
Protection on page 8 for details.
Check the battery connection terminal voltage.
If it is 18.5 V or lower, replace the battery.
Subsequently, follow the procedure described
in Battery Overdischarge on page 4.
Short the backup ON/OFF input. (At shipment,
the backup ON/OFF input is shorted.)
Refer to Backup ON/OFF Input Function on
page 8 for details.
As energy is consumed by S8T-DCBU-01, the
total output capacity of the number of
connected S8TS-06024@s cannot be obtained.
Connect one more S8TS-06024@ Basic Block.
Refer to the Derating Curve on page 11 for
details.
When three or more S8TS-06024@ Basic
Blocks are connected, set the overload
protection function selector to 11.7 A (typical).
(The default setting is 5.7 A (typical).)
Refer to Overload Protection Operating Point
Selector on page 8 for details.
The S8T-DCBU-01 detects drops in the output
voltage of the S8TS-06024@ and switches over
to backup operation. Adjust the output voltage
adjuster (V. ADJ) on the S8TS-06024@ so that
the output in a no-load state is 24.5 V or more.
Refer to Output Voltage Adjustment for S8TS-
06024
Select a fuse taking the inrush current when
backup operation is switched to into
consideration. The recommended S82Y-TS01
Battery Holder is selected taking this inrush
current into consideration.
Refer to Battery Holder S82Y-TS01 on page 6
for details.
Cancel the protection functions on the S8TS-
06024@. (Turn OFF the power of S8TS-06024@
Basic Block, and after at least one minute turn
ON the input voltage again.)
If a remedy is required during backup operation,
allow backup to finish until the battery status
indicator is lit.
Provide sufficient margin for the load capacity
when using the S8T-DCBU-01.
Replace the out-of-order S8TS-06024@.
Refer to Backup Function on page 6 for details.
Provide sufficient margin for the load capacity
when using the S8T-DCBU-01.
Replace the battery.
Subsequently, follow the procedure described
in Battery Overdischarge on page 4.
@
on page 6 for details.
S8T-DCBU-01
Remedies
17