20A to 40A DIN rail redundancy module shows load sharing balance

June 26, 2019 //By Julien Happich
DIN rail
The DRM40 series of DIN rail mount redundancy modules from TDK Corporation offer two 10V to 30Vdc inputs rated at 20A each, with an output at 40A.

The DIN rail units have 150% peak load capability for four seconds, for capacitive and inductive loading. The internal MOSFET reverse current protection devices have a low 200mV drop, reducing voltage losses in the module. A LED on the front panel provides a visual indication when both input currents are balanced and equally sharing the output load. Applications for the DRM40 modules include factory automation, process control and test and measurement equipment where two power supplies are used in a redundant configuration, paralleled to obtain higher power or for battery charging purposes.

In addition to two front mounted LEDs, the DRM40 has two isolated DC Good PhotoMOS relays to remotely monitor the presence and status of each input voltage. For cost sensitive applications, the DRM40B model provides the same reverse protection functionality, without the DC Good and current balancing circuitry. The DRM40 series is housed in a metal enclosure, measuring 124x125mm and 35mm wide. The modules are rated for full load operation in -40°C to +70°C ambient temperatures.

TDK-Lambda - www.de.tdk-lambda.com

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