The PULS ML100.200 is a simple and cost effective approach to convert the AC voltage of a typical 3-phase system into a regulated DC voltage. The ML100.200 only requires two legs of the three wire system making it ideal for when a control power transformer is changed out for a power supply. The ML100.200 is rated for 4.2A @ 24VDC (100W), has robust overload capabilities and has many advantages over a transformer.
Connecting 2 Wires Instead of 3
3-phase devices typically require that all three phases be connected to the unit in order to work properly. In some cases, there are devices that will operate on only single phase of a 3-phase system, but sometimes concerns are raised about the 3-phase power being unbalanced. This may be true when considering power circuits. However, if you compare the energy consumption of a control circuit versus a power circuit, the control circuit uses far less energy. The imbalance you might see in a power circuit is minimized when a control device such as a power supply is utilizing only two of the three wires. A power supply being connected to only two wires of a 3-phase system is no different than when a control power transformer is connected in the same manner. Connecting to only two wires can have many advantages. The power rating of the ML100.200 allows for a very compact design requiring far less space in a panel as compared to a transformer. The ML100.200 can utilize the same two wires that the transformer was connected to, making the change to DC even easier.
Other Benefits
The ML100.200 has a wide range input allowing for global main voltages of 380, 400 and 480VAC without the need of changing a jumper or supplying different units as occurs with transformers. A neutral wire is not required for the operation of the ML100.200. This helps in global applications when machine builder standards such as EN 60204-1 restricts the usage of a neutral wire. The ML100.200 has amazingly high efficiency, up to 90% and full output power can be achieved between -10°C and +60°C. The spring clamp terminals makes wiring especially easy and they stand up and hold strong to tough vibrations that might be encountered. This is true if the ML100.200 is used to power sensors along a conveyor line where the power supply enclosure is attached directly to the conveyor rail. If any of those sensors or any other devices require a NEC Class 2 power supply, PULS has that covered as well. The ML90.200 has all the features and benefits as the ML100.200 but the unit is rated for 3.75A @ 24VDC and the overload is modified to stay under the 100W max rating for NEC Class 2 approval. The ML100.200 is very compact and weighs only 360 grams, making it substantially lighter than a transformer. The input stage is very rugged and has a high immunity to transients, power surges and low electromagnetic emissions making usage in nearly all environments possible.
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Filed Under: Power supplies, ELECTRONICS • ELECTRICAL