CD401MR-SB. SW-1.20
1 NMEA Input. 2 NMEA Outputs.
Output function to calculate current, or repeat NMEA input.
CD401MR-SC. SW 1.62
2 NMEA Inputs. 1 NMEA Output.
Output only repeats NMEA 1 input. No menu with calculation of current.
NMEA, A(-) and B(+) are switched