The module 1NMEAto8RG is used to distribute
data from two alternative NMEA sources to 8
parallel working NMEA transmitters (CH3 to CH11).
Through a redundancy circuit, CH1 is switched
over to CH2 after about 4 seconds in the absence
of input data.

At the same time, an error message signaled
through a red LED and the alarm relay is opened.
The inputs and the outputs are galvanically isolated
from each other and the power supply.