650 Watt AC-DC power supplies have medical approvals

September 06, 2016 // By Graham Prophet
Artesyn Embedded Technologies’s wide input range, single output CNS650-M series of medical power supplies are built on an industry standard 4 x 6 inch footprint, and can deliver 650W with forced-air cooling (750W peak); or 400W with free-air natural convection cooling (650W peak); and feature less than 500 mW no-load power consumption.

The CNS650-M series is available in 12, 24 and 48V variants, each with a 12V fan output and 5V standby. These power supplies can continuously deliver full output power across -40 to 50C, up to 80C 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 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).


Artesyn Embedded Technologies; www.artesyn.com