The LPS103-M features a universal 85-264 Vac input – enabling it to be used anywhere in the world – and is also capable of operating from a 120-300 Vdc input. The power supply produces a tightly regulated main 12 Vdc output, together with an isolated 12 Vdc fan output; the latter is rated at 1 A, while the main output can deliver up to 8.3 A continuously with convection cooling, or up to 12.5 A continuously with 30 CFM forced air cooling. The main output can be adjusted over the range 10.8 to 13.2 Vdc, and remote sense facilities are provided to compensate for a drop of up to 0.5 V between the output terminals and the load.
Active power factor correction is employed to minimise input harmonic current distortion and ensure compliance with the international EN61000-3-2 standard – the LPS103-M has a power factor of 0.99 typical. The power supply has a maximum safety-ground leakage current of 275 µA, and the main output has a hold-up time of 16 ms minimum when the supply is fed with a 120 Vac input and is delivering 150 watts of output power.
LPS103-M power supplies are comprehensively protected against overvoltage, overtemperature and short-circuit conditions, and feature a ‘power fail’ signal for remote monitoring purposes which will change state at least 6 ms before the main output loses regulation. The power supplies have a full load ambient operating temperature range of 0 to +50 degrees Celsius without de-rating and can cold-start from temperatures as low as -20 degrees Celsius. Between 50 and 70 degrees Celsius, the output should be derated by 2.5 percent per degree.
Emerson Network Power’s LPS103-M ac-dc power supplies comply with the rigorous EN55022-B and FCC part 15 Level B EMC standards for conducted noise and meet all applicable immunity standards, including EN61000-4-2, -3, -4, -5, -6, -8 and -11 levels 3. The power supplies carry a wide set of safety approvals, including UL/TUV/CSA 60950-1 and non-patient contact and non-patient critical 60601-1.