Omron S8T-DCBU-01 Manual Download

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S8T-DCBU-01

Operation

Backup

The S8T-DCBU-01 detects drops in the output voltage of the
S8TS-06024

and switches over to backup operation.

Backup operation is continued for about seven seconds even if the
output voltage of the S8TS-06024

is reset.

Note:

If this state occurs, a probable cause is an S8TS-
06024

overload or it is out of order. Immediately

eliminate the cause of the trouble.

Output voltage also fluctuates in keeping with repeated
alternate switching between backup operation and
regular operation.

The relay contact capacity is 24 VDC, 0.1 A.

If the load fluctuates suddenly, the output voltage of the
S8TS-06024

sometimes drops resulting in backup

operation.

The maximum inrush current shown below flows when
backup operation is switched to.

Charging Circuit

Charging Time (Reference Values)

Note:

The times shown in the table above are required for
charging the battery.
If a power failure occurs within the above charging times,
backup operation at the required time may not be
possible.

Output Voltage Setting of the S8TS-06024

The DC Backup Block detects drops (approx. 23 VDC) in the
output voltage of the connected S8TS-06024

and switches over

to backup operation.

The output voltage of the S8TS-06024

can be adjusted by the

output voltage adjustment trimmer. When using the S8TS-
06024

connected to the DC Backup Block, do not set the voltage

to a value lower than the factory set voltage.

Length of Wires between S8T-DCBU-01 and
Battery

Limit the wire between the S8T-DCBU-01 and the battery to 1.5 m
or less using wires of gages indicated at "Recommended Wire
Size" on page 14.

As the battery voltage is monitored at Battery Connector terminal,
wiring longer than 1.5 m will cause a large impedance which Will
Result in a larger voltage drop on the wiring and a shorter backup
time.

S82Y-TS01 Battery Holder

We recommend using the S82Y-TS01 Battery Holder for
connecting and installing the battery. Take the following points
into consideration when using the S82Y-TS01:

(1) Contact between leaking battery fluid and metal parts having

an electric potential may cause smoke or fire. To prevent this,
place the battery on a resin battery tray.

(2) The inrush current shown below flows when backup operation

is switched to. The peak value and time of this inrush current
vary according to the capacity of the input capacitor of the
connected equipment, battery charge status, battery wiring
length, and ambient temperature. The switch and fuse of the
S82Y-TS01 are selected taking this inrush current into
consideration. When replacing the fuse, use only the specified
fuse. (Littelfuse, 257015 (15 A))

(3) In the event that the battery generates inflammable gases,

place the switch and fuse away from the convection path of the
inflammable gas to prevent the switch or fuse from causing
ignition and explosion.

(4) Storing the S8T-DCBU-01 still connected to the battery may

cause the battery to discharge and considerably reduce the
service life of the battery. To prevent this, turn the switch OFF.

Mounting and Removing Bus Line Connector

Pay attention to the following points to maintain electrical
characteristics.

• Do not insert/remove the Connectors more than 20 times.

• Do not touch the Connector terminals.

• To remove the Connectors, insert a flat-bladed screwdriver

alternately at both ends.

Backup

status