Omron S8BA LF Series Manual page 5

Connections
Block Diagrams
S8BA-24D24D@@@LF
24 VDC
Input
* In normal operation, 24 VDC is output as-is for charging the battery and from the input power supply. If 24 VDC from the input power supply
drops, the operation automatically switches to backup operation, and 24 VDC is output from the battery.
Input and output voltage time chart when shifting to backup operation
DC voltage
24 VDC
22.2 VDC (-7.5%)
21 VDC (-12.5%)
20.4 VDC (-15%)
<Measurement condition>
Switching power supply : S8VK-G48024
UPS : S8BA-24D24D240LF
Load : Rated load
When power failure occurs on the AC input side of the switching power supply
Connecting a cable to Battery connection terminal block, the input terminal block and
the output terminal block
For details about the connectable sizes and recommended cable sizes, see the following table.
Connectable size Cable
Stripped cable length
5 A
10 A
Recommended
cable size
15 A
20 A
Temperature rating for recommended cable
Diagram of the Input/output circuit block
FET
Normal operation: ON
Backup operation: OFF
FET
Normal operation: ON
Backup operation: OFF
Charge/Discharge
Battery
power failure or input voltage drop
<4ms
<4ms
Solid wire
Twisted pair
AWG
Solid wire/Twisted pair
AWG
Solid wire/Twisted pair
AWG
Solid wire/Twisted pair
AWG
Solid wire/Twisted pair
AWG
DC-DC converter
Normal operation: OFF
Backup operation: ON
FET
Normal operation
Backup operation
<4ms
2
0.2 to 4.0 mm
2
0.2 to 2.5 mm
AWG24 to 12
8 to 10 mm
2
0.5 mm
AWG20
2
0.75 mm
AWG16
2
1.25 mm
AWG14
2
2.0 mm
AWG12
90°C
S8BA-LF
24 VDC
Output
When high voltage sensitivity is set *
When standard voltage sensitivity is set*
(Factory default)
When low voltage sensitivity is set*
Input voltage
5