DIN rail modules are paralleled for battery charging
DIN rail mount redundancy modules from TDK-Lambda have load sharing balance indication. The DRM40 series is made up of two 10 to 30V DC inputs rated at 20A each and 40A output. There is a 150 per cent 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, says TDK-Lambda.
An LED on the front panel is a visual indication when both input currents are balanced and sharing the output load equally. 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 models have 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 1125 x 35 x 24mm high. The modules are rated for full load operation in -40 to +70 degrees C ambient temperatures.
Both units are safety certified to IEC/EN/UL/CSA 60950-1, IEC/EN/UL/CSA 62368-1 and UL 508, and CE marked for the Low Voltage, EMC and RoHS Directives.
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