650W modular AC-DC power supply shrinks in size
The 108mm wide QM4 modular AC-DC power supply range accepts up to four single or dual output modules and a dual output standby/signal board to provide up to 10 outputs. All the models in the range have low acoustic noise and full MOPPs isolation. With medical and industrial safety certifications, the QM series is suitable for applications such as BF rated medical equipment, test and measurement, broadcast, communications and renewable energy.
The QM4 can deliver 650W output power with a 180-264Vac input and 550W with a wide range 90-264Vac input. Output voltages from 2.8V to 105.6V can be specified and an optional standby/signal module can be fitted. This provides a choice of one or two standby voltages (5V, 12V and 13.5V at up to 2A), a PMBus communication interface, unit inhibit or enable, and an AC Good signal.
The modular AC-DC power supply units can operate in ambient temperatures of -20 to +70ºC, derating output power and output current by 2.5% per ºC above 50ºC. Overall case dimensions are a compact 108 x 63.5 x 270mm (W x H x D), and the weight is between 1.125kg and 1.845kg, depending on the module configuration. The QM series’ operating efficiency is up to 91%, reducing internal heat losses and allowing the use of a low speed, low audible noise fan for cooling.
The QM series power supplies are certified to IEC/EN/UL/CSA 60601‑1, ANSI/AAMI ES 60601‑1, IEC/EN 61010‑1 andIEC/EN/UL/CSA 60950‑1, with CE marking for the Low Voltage, EMC and RoHS2 Directives. With an input to output isolation of 4,000Vac (2 x MOPPs), 1,500Vac input to ground (1 x MOPP) and 1,500Vac (1 x MOPP) output to ground, the series can be used in BF rated medical equipment such as blood pressure monitors and incubators. The QM4 has a maximum earth leakage current of 300µA, while still complying with the EN61000-6-3:2007 and EN60601-1-2:2015 (curve B conducted and radiated) emission standards. The units also meet the EN60601-1-2 and EN61000-6-2 immunity standards.
Configuration of the modular AC-DC power supplies is through an online configurator that provides an optimised module selection with a choice of signals, leakage current and standby voltages. Upon entering the desired output voltages and currents, the configurator will automatically produce a short 7-digit code to facilitate easy order placement with a seven year guarantee.
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