Emerson Network Power NPT42-M power supply

Emerson Network Power has released the NPT42-M triple-output open-frame AC-DC power supply that can deliver up to 45 W with convection cooling and up to 55 W with forced air cooling.

It can accommodate operating temperatures from -20 to +50°C at full power and as high as 80°C with de-rating. Carrying a comprehensive set of worldwide IT equipment (ITE) and non-patient contact and non-patient critical medical safety approvals, the NPT42-M is suitable for a wide range of light industrial, instrumentation and process systems, as well as low-power dental and laboratory equipment.

With a 51 x 102 mm footprint, the supply has a height of 25 mm, making it suitable for 1U high portable and rack-mounting equipment.

The supply has a wide-range universal input capable of accommodating any AC voltage from 90 to 264, at any frequency from 47 to 440 Hz. It can also operate from any DC input in the range 127 to 300 V. It requires less than 74 W of input, and inrush current is less than 50 A peak at 230 VAC.

The supply provides a triple output of +5, +12 and -12 V. The main +5 V output can deliver 5 A continuously, with standard convection cooling, and up to 8 A with forced air cooling. The auxiliary +12 and -12 V outputs can supply 2.5 and 0.5 A, increasing to 3 A and 0.7 A with forced air cooling.

All three outputs are tightly regulated. The 5 V output is maintained to within plus or minus 2% for all normal line and load conditions and has a maximum ripple of 50 mV peak-to-peak. Both 12 V outputs are regulated to within plus or minus 5%.

The supply fully complies with the international EN 61000-3-2 standard for harmonic emissions. It features built-in EMI filters (CISPR 22 Class B) and meets rigorous international EMC standards, including FCC Class B, EN 55022 class B and VDE 0878PT3 Class B for conducted noise.

Key safety design aspects include fuses in both the line and neutral connections and a safety-ground leakage current which does not exceed 275 µA. Safety approvals include TUV/UL/CSA 60950 and 60601-1, CB certificate, CE mark (LVD) and CQC mark.