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Wide input 650W AC-DC supplies for medical designs

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By Nick Flaherty


Contained within an industry standard 10.16 x 15.24cm (4 x 6 in) footprint, the CNS650-M series can deliver a peak power of 750 W with forced-air cooling or 400 W with free-air natural convection cooling (650 W peak) and feature less than 500 mW no-load power consumption.

The units are available in 12 V, 24 V and 48 V variants, each with a 12 V fan output and 5 V standby. These power supplies can continuously deliver full output power across the wide temperature range of minus 40 degrees Celsius to 50 degrees Celsius and up to 80 degrees Celsius with derating.

The supplies carry medical and ITE safety approvals and incorporate 2XMOPP (Means of Patient Protection) to fully protect and isolate patients from the powered medical equipment. With an isolation of 4000 Vac (input to output) or 1500 Vac (input to PE; output to PE), these units are Type BF ready: for powering equipment where there is conductive contact with the patient, but not the heart, such as ultrasound monitors, blood pressure monitors, incubators, ECG equipment and operating tables.

Where an application requires more power, the active current share facility uses a signal wire to interlink two or more power supplies in parallel to increase output current capability. The built-in PMBus interface feature provides flexible and comprehensive digital communication via the PMBus command protocol with control and monitoring functions for voltage, current, temperature and the reporting of fault conditions.

 The CNS650-M range is less than 1U high and is available in U-channel, open-frame and enclosed end-fan options (open-frame and enclosed end-fan options currently available on 12 V model). The unit’s built-in 61000-3-2 compliant active power factor correction and Class B EMI filter deliver an EMI/RFI performance to Level B (conducted), Level B (radiated with cover).

Medical and other certifications can be found at www.artesyn.com/power/power-supplies/websheet/592/cns650-mu-series 


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