DIN rail-mount redundancy power modules meet IEC safety standards

28th November 2019
Mick Elliott

A new series of DIN rail-mount redundancy power modules from TDK-Lambda is available at RS Components. Designed for automation and general-purpose industrial applications, the DRM40 and DRM40B power modules offer 20 to 40A current handling capability and can be used in N+1 redundancy systems and applications.

Alternatively, two supplies can be placed in parallel for additional power.

A key feature of the higher-end DRM40 unit is a current-balancing LED indicator, which turns on when two power supplies have been adjusted to deliver the same current, thereby making it easier to ensure load sharing.

In addition, two isolated alarm signals indicate the output voltage status of each power supply, making it simple to enable remote fault monitoring.

However, a lower cost unit – the DRM40B – is also available for applications not demanding these advanced features.

Designed to take up less space on the DIN rail, the DRM40 series comes in a highly compact unit with dimensions of only 35 x 125 x 124mm.

Offering an operating temperature range of –40 to +70ºC, key electrical characteristics include: an internal voltage drop of only 200mV at 40A, enabling low power loss; a wide input voltage range of 10 to 30V; and maximum input current of 20A on each of the unit’s two inputs, plus a peak input capability of 2 x 30A for 4s.

Shipping now from RS in the EMEA and Asia Pacific regions, the series also meets the IEC/EN/UL60950-1, IEC/EN/UL62368-1 and UL508 safety standards for a range of industries and applications.

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