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BXA15 and BXA30 SERIES
Design Note 100 Rev. 01 - Feb. 1999
• Safety and the low voltage directive •...
www.DataSheet4U.com
BXA15 and BXA30 SERIES
Design Note 100 Rev. 01 - Feb. 1999
Safety and the low
voltage directive Electromagnetic Compatibility Immunity Electromagnetic Compatibility Conducted and Radiated Interference Telecom and Distributed Power Architecture Features System Protection Features Thermal Considerations Input Impedance Considerations
1. Safety and the Low
Voltage Directive
The BXA15 and BXA30 series is intended to be supplied only from a SELV (Safe Extra Low
Voltage) circuit or a TNV (Telecommunications Network
Voltage) power source which are insulated from the AC mains by reinforced insulation. Basic isolation, tested to 1,500VDC, for EN60950 and UL1950, is provided. SELV TNV DC Distributed Power of 12V, 24V or 48V Central Office -48V Conducted Interference - Level B External Filter: The addition of an external capacitor enables the BXA15 and BXA30 products to meet VDE0871/8-B, EN55022-B and CISPR22-B conducted noise limits. The test set-up is per VDE 0877 Part 1 fig.4 with the load < 10 cm's away from the test converter. Input
Voltage 48 Volt 24 Volt 12 Volt Recommended External Cap. Nippon Chemi-Con SXE series120uF, 100V ITW PAKTRON Capstick series part number 405K100CS4, 4uF @ 100V ITW PAKTRON 405K100CS4 2 * ITW PAKTRON 405K100CS4
capacitors in close parallel.
2. Electromagnetic Compatibility Immunity
Good design practice dictates that the electronic system be immune to noise interference. This practice has now been encapsulated in Europ...