The DRM40 and DRM40B power modules are designed for automation and general-purpose industrial applications. They offer 20 to 40A current handling capability and can be used in N+1 redundancy systems and applications. The two supplies can also 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. RS Components says this makes it easier to ensure load sharing. In addition, two isolated alarm signals indicate the output voltage status of each power supply, which can help with remote fault monitoring.
The lower cost unit – the DRM40B – is available for applications not demanding these advanced features. The DRM40 series comes in a highly compact unit with dimensions of only 35 x 125 x 124mm – designed to take up less space on the DIN rail.
The modules also offer an operating temperature range of –40 to +70°C. Key electrical characteristics include an internal voltage drop of only 200mV at 40A, a wide input voltage range of 10 to 30V, maximum input current of 20A on each of the unit’s two inputs, and a peak input capability of 2 x 30A for 4s.
