Germanischer Lloyd has granted GL approval to Weidmüller’s family of switch-mode power supplies 'PRO-M'. The units can now be deployed in national and international shipbuilding projects, ship refurbishments, in 'marine engineering structures' as well as the offshore sector such as in wind turbine systems. They have been approved to 'Environmental Category C, EMC 1', which means the 'PRO-M' family is also approved for installation in bridge applications.

With 'PRO-M (Power-Reliable-Optimized) Weidmüller offers a reliable and efficient family of 24 VDC switch-mode power supplies for the marine engineering sector. The ten different single- and three-phase switch-mode power supply units are housed in a compactly designed, robust metal housing. Further distinguishing characteristics of the family include better than 90% efficiency, overload resistance and high performance reserves at standard temperatures.

The power output can be increased by connecting up to five units in parallel – without a diode module. AC and DC wide-range inputs mean the units are suitable for universal deployment anywhere in the world. Made of metal the housings of the power supplies are slim and robust by design. 'PRO-M' devices are rated to IP20 and, to save space, can be mounted flush side-by-side without spacing on TS 35 mounting rails. No air gap is required for cooling purposes. The MTBF time (Mean Time Between Failures) is >500 000 hours to IEC 1709 (SN29500). Each unit comes with a temperature range of -25…+70 °C.