Buffer Block S8T-DCBU-02 CSM S8T-DCBU-02 DS E 9 1 Prevents Equipment Stoppage, Data Loss, and Other Problems Resulting from Momentary Power Failures Provides a backup time of 500 ms at an output current of 2.5 A. Can be wired to the 24-V output from the S8VS Supplies. Connects to an S8TS Power Supply via an S8T-BUS03 Bus Line Connector. Parallel connections to up to four Blocks can be used to increase the backup time and current capacities. Complies with SEMI F47-0200 standard. RoHS-compliant Ambient operating temperature range of 20 to 60C. S8T-DCBU-02 S8TS For the most recent information on models that have been certified for Refer to Safety Precautions for All Power Supplies and Safety safety standards, refer to your OMRON website. Precautions on page 16. Ordering Information Buffer Block Input voltage Output voltage Output current Model number (during backup operation) 24 VDC (24 to 28 VDC) 22.5 V 2.5 A S8T-DCBU-02 Options (Order Separately) Bus Line Connector (Connects to Buffer Block) Type Number of Connectors Model number Connector with DC line connected. 1 Connector S8T-BUS03 10 Connectors (See note.) S8T-BUS13 Note: One package contains 10 S8T-BUS03 Connectors. Basic Configuration Connecting to the S8TS-06024 Connection via Wiring Connect to AC lines. Connect to AC lines. S8TS-06024 (Order separately.) S8T-BUS03 Bus Line Connector (Order separately.) S8T-DCBU-02 Load Load 1S8T-DCBU-02 Specifications Ratings/Characteristics Item Model S8T-DCBU-02 Input Voltage 24 to 28 VDC Current Charging 0.4 A Standby 0.18 A Output Backup Output voltage For 24 V: 22.5 V typ., 22.0 V min. (See note 1.) operation For 28 V: 26.4 V typ., 25.8 V min. Output current 2.5 A Backup time Time required until the voltage drops from the fully charged level down to 21.6 VDC (See note 2.) 1,000 ms min. (for an output current of 1.2 A) 500 ms min. (for an output current of 2.5 A) Additional Output READY indicator Yes (color: green) functions functions READY output Yes (relay: 24 VDC, 0.1 A max.) (See note 3.) 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 65C Ambient humidity Operating: 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 resistance 100 M 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 2 Shock resistance (See notes 5 and 6.) 150 m/s , 3 times each in X, Y, and Z directions EMI Conducted Emission Conforms to EN61204-3 EN55011 Class B and based on FCC Class A (See note 5.) Radiated Emission Conforms to EN61204-3 EN55011 Class B EMS Conforms to EN61204-3 High severity levels Approved UL: UL508 (Listing Class 2: Per UL1310) (See note 7.), UL60950-1 standards cUL: CSA C22.2 No.14 (Class 2: Per No. 223) (See note 7.), cUR: CSA No. 60950-1 EN/VDE: EN50178 (= VDE0160), EN60950-1 (= VDE0805 Teil 1) SEMI SEMI F47-0200 Weight 450 g max. Note: 1. The output characteristics are specified at the power output terminals. 2. Refer to Backup Time on page 10 for details. 3. Refer to Functions on page 7 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: Order separately) on each end of the Buffer Block. Refer to DIN Rails on page 15. 7. To comply with Class 2, connect one S8TS-06024 to one S8T-DCBU-02 Buffer Block. Reference Value Item Value Definition Reliability 135,000 hrs MTBF stands for Mean Time Between (MTBF) min. Failures, which is calculated according to the probability of accidental device fail- ures, and indicates reliability of devices. Therefore, it does not necessarily repre- sent a life of the product. Life 10 yrs. min. The life expectancy indicates average op- expectancy erating hours under the ambient tempera- ture of 40C and a load rate of 50%. Normally this is determined by the life ex- pectancy of the built-in aluminum electro- lytic capacitor. 2