DIN-rail power supplies are slim for building automation

DIN-rail mounted AC/DC power supplies in the DRL series by TDK range from 10 to 100W and efficiencies of up to 90 per cent. They have a low profile and are narrow in width, making them suitable for wall mounted enclosures commonly used in building automation and security applications. Average efficiency is up to 87 per cent, says the company, enabling the DIN power supplies to also meet ErP efficiency standards.

The DRL series models are housed in a robust plastic case, measuring 55.6mm deep, and 91mm high. Widths vary from 18, 36, 54 and 72mm for the 10, 30, 60 and 100W-rated models. The supplies operate from a wide range input of 85 to 264V AC and can withstand a 300V AC peak for five seconds. All package sizes have a 24V output and 12V is available for the 10, 30 and 60W models.  The 30, 60 and 100W outputs are adjustable from 12 to 15V or 24 to 28V.

Supplies have a Class II (double insulated) construction, requiring no earth ground connection, and 3,000V AC input to output isolation. Off-load power consumption is less than 0.3W for the 10 and 30W and less than 0.5W for the 60 and 100W versions. All models are convection-cooled and are rated for operation in -20 to +71 degree C ambient temperatures (derating applies at high temperature).

The units are certified to IEC/EN/UL/CSA 60950-1, UL 508, CE marked for the Low Voltage, EMC and RoHS2 Directives, with select models complying to NEC Class 2 in accordance with UL1310. All models meet EN55022-B conducted emissions, EN55022-A radiated emissions, EN 61000-3-2 harmonic currents and EN61000-4 immunity standards.


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