Rail mounting device, 2 rail units. New system feature: Fully-encrypted radio transmission (AES-CCM) from eNet Server software version 2.0. Intended use: Radio receiver for flush-mounted series modules, Operation with power supply, ref.-no.: NT 1220 REG VDC, Mounting on DIN rail. Product characteristics: Integrated antenna, External antenna (ref.-no.: FM ANT) can additionally be connected in case of disadvantageous installation conditions, e.g. metallic distribution boxes.