LDX-B20 BEL | Alldatasheet

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Technical content

The LDX-B20 is a microprocessor controlled buffer unit rated 20 A usable in 12 V, 24 V, 48 V and 72 V systems. The LDX-B20 monitors the voltage coming from a DC power supply and in case of failure a capacitor bank is us ed to keep the output regulated for at least 300 ms at full load.  Wide voltage range 12 - 85 VDC  Compact size  DC BUS voltage self-tracking  Boost Max peak power of DC supply  Multiple protections  Digital regulation  Reliable topology, based on standard electrolytic capacitors  > 150 Joules energy storage  Integrates low power step-up (boost) converter to charge the capacitor bank  Integrates 20 A step-down (buck) converter to discharge the capacitor bank at an adjustable output voltage in case of mains failure  Relays dry contact and an opto-isolated input for inhibit  Integrated safety circuit that disconnects the capacitor bank in case of internal failure  Parallelable for power and backup time increase

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tech.support@psbel.com LDX-B20 12 / 24 / 48 72 VDC (12 - 85 VDC) Max. 2 A Vin – 1 V (12 / 24 / 48 / 72 VDC – 1 V)

20 A @ < 48 VDC

16 A @ > 48 VDC

Input Voltage (Range) Auto detection 12 / 24 / 48 72 VDC (12 - 85 VDC) Input Current For capacitor charging, voltage dependent Max. 2 A Charging Time Voltage dependent < 40 s Output Voltage Uin – 1 V (12 / 24 / 48 / 72 VDC – 1 V) Output Current Continuous 20 A @ < 48 VDC Max. Duration of the Output Voltage

12 VDC @ 20 A

24 VDC @ 20 A

48 VDC @ 20 A

72 VDC @ 16 A

Ripple & Noise @ I Max < 250 mVpp / 24 VDC Status Signals -color LED contact (1 A / 30 V) Overload / Short Circuit Protection Active – One Shot Overvoltage Protection Active Operating Modes AUTO: Senses the input voltage and supplies the load when the voltage drops MANUAL: Fixed output voltage (12 / 24 / 48 / 72 VDC), user settable by front button Control CPU Operating Temperature -40°C to +70°C Storage Temperature -20°C to +80°C Humidity Non-condensing 5 - 95% r.H. Isolation DC bus / ground isolation 0.75 kVDC Cooling Method Natural convection cooling Safety Standards & Approvals UL508 (reference) EN60950 (reference) EMC Standards Emission EN55022: 2010 (CISPR22) EN55011: 2009 /A1:2010 Class A Class A Immunity EN61000-4-2:2008 EN61000-4-3:2006 /A2:2010 EN61000-4-4:2012 EN61000-4-5:2014 EN61000-4-11:2004 /A1:2010 Level 3 Level 3 Level 3 Level 1 Level 2

+86 755 298 85888 Europe, Middle East +353 61 225 977 North America +1 408 785 5200 © 2016 Bel Power Solutions & Protection BCD.00855_AA Protection Degree EN60529:1989 / A:2013 IP20 Vibration Sinusoidal IEC 60068-2-6:2007 5-17.8 Hz: ±1.6 mm; 17.8-500 Hz: 2g 2Hours / axis (X, Y, Z) Shock IEC 60068-2-27:2008 30 g 6 ms, 20 g 11 ms; 3 bumps / direction, 18 bumps total NOTES:  Technical parameters are typical, measured in laboratory environment at 25°C.  For more details, performance and description regarding all parameters not indicated in the above table, refer to user manual.  Data may change without prior notice in order to improve the product Weight 900 g Dimensions 63 x 140 x 117 mm Case Material Aluminum Mounting Rail IEC 60715/H15/TH35-7.5(-15) Buffer time vs. output current 500 1000 1500 2000 2500 3000 Output Current [A] V V V V

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Figure 1. Mechanical Drawing maximal energy and the inhibit input is inactive. equipment used in hazardous environments, or nuclear control systems. date manufactured. Specifications are subject to change without notice.