Buffer Block
last update: November 24, 2020
Model | S8T-DCBU-02 | ||
---|---|---|---|
Input | Voltage | 24 to 28 VDC | |
Current | Charging | 0.4 A | |
Standby | 0.18 A | ||
Output
*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 current | 2.5 A | ||
Backup time
*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 *3 |
READY indicator | Yes (color: green) |
READY output | Yes (relay: 24 VDC, 0.1 A max.) | ||
Backup indictor | Yes (color: red) | ||
Backup output | Yes (relay: 24 VDC, 0.1 A max.) | ||
Overcurrent protection | Reverse-L dropping, automatic reset, overcurrent detection point:
5.8 to 6.8 A |
||
Overvoltage protection | Yes | ||
Parallel operation | Yes (Up to 4 Blocks) | ||
Series operation | No | ||
Other | Ambient operating
temperature |
Refer to the derating curve in Engineering Data. (with no condensation
or icing) |
|
Storage temperature | -25 to 65°C | ||
Ambient humidity | Operating: 25% to 85%; Storage: 25% to 90% | ||
Dielectric strength *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 resistance | 100 MΩ min. (between all DC connection terminals and PE terminals)
at 500 VDC |
||
Vibration resistance *5 *6 | 10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z
directions |
||
Shock resistance *5 *6 | 150 m/s2, 3 times each in ±X, ±Y, and ±Z directions | ||
EMI | Conducted
Emission *5 |
Conforms to EN61204-3 EN55011 Class B and based on FCC Class A | |
Radiated
Emission |
Conforms to EN61204-3 EN55011 Class B | ||
EMS | Conforms to EN61204-3 High severity levels | ||
Approved
standards |
UL: | UL508 (Listing; Class 2: Per UL1310) *7 | |
cUL: | CSA C22.2 No.107.1 (Class 2: Per No. 223) *7 | ||
EN: | EN62477-1 | ||
SEMI | SEMI F47-0200 | ||
Weight | 450 g max. |
Item | Value | Definition |
---|---|---|
Reliability (MTBF) | 135,000 hrs min. | MTBF stands for Mean Time Between Failures, which is calculated according
to the probability of accidental device failures, and indicates reliability of devices. Therefore, it does not necessarily represent a life of the product. |
Life expectancy | 10 yrs. min. | The life expectancy indicates average operating hours under the ambient
temperature of 40°C and a load rate of 50%. Normally this is determined by the life expectancy of the built-in aluminum electrolytic capacitor. |
last update: November 24, 2020