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S8BA-LF
5
Connections
Block Diagrams
S8BA-24D24D
@@@
LF
*
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
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
Solid wire
0.2 to 4.0 mm
2
Twisted pair
0.2 to 2.5 mm
2
AWG
AWG24 to 12
Stripped cable length
8 to 10 mm
Recommended
cable size
5 A
Solid wire/Twisted pair
0.5 mm
2
AWG
AWG20
10 A
Solid wire/Twisted pair
0.75 mm
2
AWG
AWG16
15 A
Solid wire/Twisted pair
1.25 mm
2
AWG
AWG14
20 A
Solid wire/Twisted pair
2.0 mm
2
AWG
AWG12
Temperature rating for recommended cable
90°C
Diagram of the Inp
u
t/o
u
tp
u
t circ
u
it
b
lock
FET
FET
Charge/Discharge
Battery
DC-DC con
v
erter
N
ormal operation
Back
u
p operation
FET
24
V
DC
Inp
u
t
24
V
DC
O
u
tp
u
t
N
ormal operation: OFF
Back
u
p operation: O
N
N
ormal operation: O
N
Back
u
p operation: OFF
N
ormal operation: O
N
Back
u
p operation: OFF
<4ms
<4ms
When high voltage sensitivity is set
*
When standard voltage sensitivity is set*
(Factory default)
When low voltage sensitivity is set*
Input voltage
<4ms
power failure or input voltage drop
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
DC voltage
24 VDC