Page top

Primary Contents



Ratings and Specifications

ModelS8T-DCBU-02
InputVoltage24 to 28 VDC
CurrentCharging0.4 A
Standby0.18 A
Output
(See note 1.)
Backup
operation
Output
voltage
For 24 V: 22.5 V typ., 22.0 V min.
For 28 V: 26.4 V typ., 25.8 V min.
Output current2.5 A
Backup time
(See note 2.)
Time required until the voltage drops from the fully charged level down to 21.6 VDC
1,000 ms min. (for an output current of 1.2 A)
500 ms min. (for an output current of 2.5 A)
Additional
functions
Output functions
(See note 3.)
READY
indicator
Yes (color: green)
READY outputYes (relay: 24 VDC, 0.1 A max.)
Backup indictorYes (color: red)
Backup outputYes (relay: 24 VDC, 0.1 A max.)
Overcurrent protectionReverse-L dropping, automatic reset, overcurrent detection point: 5.8 to 6.8 A
Overvoltage protectionYes
Parallel operationYes (Up to 4 Blocks)
Series operationNo
OtherAmbient operating temperatureRefer to the derating curve on Datasheet
Storage temperature-25 to 65°C
Ambient humidityOperating: 25% to 85%; Storage: 25% to 90%
Dielectric strength
(See note 4.)
1.0 kVAC for 1 minute (between all DC connection terminals and PE terminals; Detection current: 20 mA)
500 VAC for 1 minute (between all DC connection terminals/PE terminals and all signal output terminals; detection current: 20 mA)
Insulation resistance100 MΩ min. (between all DC connection terminals and PE terminals) at 500 VDC
Vibration resistance
(See notes 5 and 6.)
10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z directions
Shock resistance
(See notes 5 and 6.)
150 m/s2, 3 times each in ±X, ±Y, and ±Z directions
EMIConducted
Emission
(See note 5.)
Conforms to EN61204-3 EN55011 Class B and based on FCC Class A
Radiated
Emission
Conforms to EN61204-3 EN55011 Class B
EMSConforms to EN61204-3 High severity levels
Approved
standards
UL:

cUL:

cUR:
EN/VDE:
UL508 (Listing; Class 2: Per UL1310) (See note 7.), UL60950-1,
UL1604 (Listing; Class I/Division 2, Group A, B, C, D Hazardous Locations)
CSA C22.2 No.14 (Class 2: Per No. 223) (See note 7.),
No. 213 (Class I/Division 2, Group A, B, C, D Hazardous Locations)
CSA No. 60950-1
EN50178 (= VDE0160), EN60950-1 (= VDE0805 Teil 1)
SEMISEMI F47-0200
Weight450 g max.

Note:

1. The output characteristics are specified at the power output terminals.

2. Refer to Backup Time on datasheet for details.

3. Refer to Functions on datasheet for details.

4. If the number of S8T-DCBU-02 Buffer Blocks to be connected is "N", set the detection current to 20 mA × N.

5. Specified by S8TS-06024[] connection.

6. Be sure to mount an End Plate (PFP-M: Optional) on each end of the Buffer Block

7. To comply with Class 2, connect one S8TS-06024[] to one S8T-DCBU-02 Buffer Block.

Caution: In the interenst of product improvement, specifications are subject to change without notice.