Puls Power has introduced a 500W industrial point-of-load ac-dc power supply that is environmentally protected in its own right, allowing installation without an additional cabinet.

The target is industrial power decentralisation, where multiple small ac-dc PSUs are placed around an installation next to their loads, rather that having one large ac-dc PSU and a local low-voltage dc power distribution network.

“There are many applications, such as conveyor belts or production lines that can be supplied with energy much more efficiently and flexibly on a decentralised basis,” according to Puls marketeer Maximilian Hülsebusch. “The power supply no longer has to be over-sized, and the individual system parts can be put together on a modular basis, allowing them to be extended, maintained, and converted more quickly and effectively than ever. By making the cabinets smaller, or even doing away with them entirely. [Dc] power cable lengths and cross-sections can be reduced, which in turn saves on the costs of copper.”

The cost of implementing a decentralised power supply remains high, he went on to say, partially because each separate supply needs cabinet protection – that each carry an installation overhead.

Enter its waterproof 500W ac-dc power supply – branded ‘ZeroCabinet’.

“Until now, there has not been a decentralised standard power supply that is available to order ex stock, is easy to install and is flexible enough,” claimed the company.

There is actually a choice to protection classes: IP54, IP65 or IP67, followed by a choice of: single-phase (85-264V or 170-264V) or three-phase (320-550V) input, 500W or 300W output (at 24-28V in all cases), and ‘Basic’ or ‘eFused’ types.

Below 45°C, 360W or 600W are available from nominal 300W and 600W types, and for up to five seconds 600W or 1,000W can be delivered.

Puls-ZeroCabinet-eFusedBasic ZeroCabinets are single-output types, and can be connected in parallel to increase total output power, or to form an N+1 redundant system by OR-ing using integrated mosfets and droop regulation.

eFused ZeroCabinets (left) may be specified with up to four current-limited outputs, and may be configured for NEC Class 2 circuits. Features include staggered output activation, protection of sensitive loads through prioritised outputs and selective shutdown in the event of a fault.

There are LEDs to indicate system status and in-field diagnosis in the field, plus IO-Link comms. In eFused types, output voltage and current-limits can be monitored and set through front panel LEDs and push-buttons, or remotely via IO-Link.

Connector options are: 7/8inch, M12, HAN-Q or Quickon (with more on request). DIN-Rail, keyhole or screw mounting is possible without additional accessories.

Operation is across -25 to +55°C, at up to 95% efficiency.

Dimensions for all types are 181 x 183 x 57mm.

As well as with conveyors, applications are expected with robotics and materials handling.