DIN-rail power supplies hailed as 'fit & forget'

29th May 2015

Nat Bowers

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Available with standard output voltages of 12 and 24VDC, adjustable by a front cover potentiometer, the REDIN45 and REDIN60 DIN-Rail power supplies have been unveiled by RECOM. In order to make them as durable and reliable as possible, high quality components and generous design margins were used to ensure a long, trouble-free life. The concept behind the power supplies is 'fit & forget' because once fitted, they should never need any further attention.

The excellent line & load regulation of the REDIN series ensures a stable constant voltage output, which is signalled through a front panel 'DC-OK' lamp. The modules are also equipped with voltage-free 'DC-OK' contacts, to either directly control a remote indicator lamp or to send a signal to a central monitoring point. Contacts of multiple modules can be daisy-chained to generate a general 'System Power OK' signal.

Operating over a temperature range from -20 to +70°C, the devices' high efficiency reaches 87% and stand-by losses of less than 0.5W reduce energy consumption and heat generation. Most power supply failures occur because of input voltage surges and transients, so special care was given to designing a robust input filter. In addition, a long hold-up time of 50ms at full load ensures a stable output even with unreliable mains inputs.

The power supplies are equipped with numerous safety protection measures as standard; besides short circuit and over-current protection with automatic restart. They are also over-temperature and over-voltage protected with a latching function. The power supplies are fully certified by UL to IEC/EN/UL60950, CE and UL508. A universal input voltage range of 85-264VAC and altitude up to 5,000m means that they are suitable for worldwide use.

The compact DIN-rail power supplies with dimensions of 88.6x41.1x101.4mm save DIN-rail space because the modules can be installed next to each other without the need for any spaces between. As an alternative to end-mounting, the power supplies can also be side mounted for use in in low-profile cabinets.

All REDIN power supplies are designed for 24/7 operation and are therefore 100% burn-in tested under full load and undergo stringent final inspections. The long design lifetime has also been proven in accelerated ageing testing. RECOM is so confident of the robustness of the REDIN series that it offers a full seven year warranty – more than double than most of the competition. The modules are available from all major distributors.