S8BA-SBF
25
Connections
Block Diagrams
S8BA-24D24D
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SBF
Note: 1.
In normal operation, 24 VDC is output as-is for charging the battery and from the input power supply.
If the 24 VDC from the input power supply becomes lower, 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 the input terminal block and the output terminal block
For details about the connectable sizes and recommended cable sizes, see the following table.
20 A
40 A
Connectable sizes
Cable
Solid wire
0.2 to 10 mm
2
0.75 to 16.0 mm
2
Stranded wire
0.2 to 6 mm
2
AWG
AWG 8 to 24
AWG 6 to 18
Stripped cable length
8 to 10 mm
18 mm
Recommended sizes
Solid wire /
Stranded wire
2.0 mm
2
8.0 to 14.0 mm
2
AWG
AWG 12
AWG 6 to 8
Temperature rating for recommended cable
90°C
24 VDC
Control unit
Battery unit
Input
24 VDC
Normal operation: OFF
Backup operation: ON
Output
Battery
Normal operation
Backup operation
FET
Normal operation: ON
Backup operation: OFF
FET
Charge
Normal operation: ON
Backup operation: OFF
FET
power failure or input voltage drop
28 V
21 V
24 VDC
22 VDC
Output voltage
Input voltage
18 VDC
DC voltage