SLV20.200

Buffering: Electrolytic caps. instead of accumulators CB scheme Data sheet SLV20.200 IEC60950 • Buffering for 24V loads • Minimum hold-up time: 0.2s/20A (max. buffer time depends on load) • Fit for industrial use: Energy storage in electrolytic caps., no accumulators • Clear status indication by Status LED and signalling terminals UL508 LISTED IND. CONT. EQ. 18 WM, 60°C UL60950 E137006 CUL/CSA-C22.2 No 60950 EMC and Low Volt. Directive Short description The buffer unit is a supplementary device for regulated DC 24V power supplies. It buffers load currents during typical mains faults and switching events or load peaks. Working principle Charge Buffer In times when the power supply proviDC des sufficient voltage, the buffer unit Discharge stores energy in integrated electrolytic capacitors. In case of a mains voltage fault, this energy is released again in a regulated process. Bridges mains faults without AC interruption Statistics show that 80 percent of all DC mains faults last less than 0.2s. These Buffer unit mains faults are completely bridged by the buffer unit and will have no influence on the DC power (startup-delay of power supply used might be taken under consideration. This increases the reliability of the system as a whole. Extended hold-up time Once the main power fails or is swit- AC ched off, the buffer unit will contiDC nue to provide the load current for a Buffer unit defined period of time. Process data can be saved and processes can be terminated before the DC power switches off. Controlled restarts are subsequently possible. Easy to handle, expandable and maintenance-free The buffer unit does not require any control wiring. It can be added parallel to the load circuit at any given point. Any given number of buffer units can be switched parallel to increase the output capacity or the hold-up time. The dual terminals allow for easy wiring. In addition, there is a housing connection. Short Overview - Technical Data Short Overview - Technical Data Rated voltage DC 24V Idling input current typ. 80mA Voltage range DC 24...28.8V Power dissipation typ. 1.9W Buffered voltage selectable by front jumper setting Vin -1V: 23 - 27.8V (variable threshold) 22.5V fixed: 22.5V (fixed threshold) Degree of protection IP20 (EN 60529) Dimensions (W x H x D) 64mm x 124mm x 102mm (without DIN rail) Weight Reversed power immunity max. +35V Protection against polarity reversal max. -35V Charging current 20A Charging time 18...27s (primary charge) Hold-up time • minimum • typical see diagramm (page 2) 0,2s (22,5V/20A) or 28s (22,5V/100mA) 0,31s (22,5V/20A) or 43s (22,5V/100mA) 740g Safety Terminal voltage SELV, IEC/EN 60950 Classification PELV (IEC364-4-41) PELV (EN 60204) Isolation resistance 5MOhm (terminal→housing) Degree of protection IP20 (EN 60529) PELV (EN50178) Penetration protection > 3.5 x 3.5 mm Internal fusing none Galvanic isolation to signal path 500V Order information slv20e200 Rev. C 040527 Order number Description SLV20.200 XF-1x4s/270-60 SLZ11 SLZ02 DIN rail electrolytic capacitor buffer unit Mating connector for signalling terminals (part of delivery) Adapter for S7-300 rail Wall mounting set (two pcs. per package) 1/4 Data sheet SLV20.200 Hold-up time Technical Data Buffer Charging Charging delay time typ. 4s Charging current 0.4...0.6A Charging time 18...27s (primary charge / cold start) Buffer Operation Rated output current 20A Current limitation >20A Hold-up time • minimum • typical see diagramm (page 2) 0,2s (22,5V/20A) or 28s (22,5V/100mA) 0,31s (22,5V/20A) or 43s (22,5V/100mA) To increase buffer current and/or extend hold-up time any given number of buffer unit can be switched parallel (max. load per terminal = 30A) Activation threshold “22.5V fixed” Buffering starts if terminal voltage 1V Buffers are discharged, no external voltage or external voltage 1V • Pos. 2-3: DC22.5V fixed. Voltage buffering starts at Vin