Calypso Nmea Connect Plus User Manual page 17

Wired Standar
VCC
GND
Config RX+
Config Rx -
6.3.2 NMEA 0183 Output
To connect a NMEA 0183 instrument to the NCP NMEA 0183 output, follow next
table.
NMEA OUT A/+
NMEA OUT B/ -
GND
Earlier versions of NMEA 0183 (before V2.0) used slightly different connection
methods and signals levels. The instruments had just one 'NMEA' data line ('Tx' or
'Out') and used the ground as the other line. It is possible to connect an old type single‐
ended system by connecting the NMEA -/B output from the NCP to the 'Rx/In' input of
the device, and the NMEA +/A output from the NCP to the ground of the single‐ended
device (not all devices use the same nomenclarute, if this doesn't work like this, swap
the cables).
Single-ended device
NMEA Data/Rx/In
GND
GND
The following image shows the connection of the NCP RS485 output with a single-
ended device, in which one power supply is shared between the NCP and the single-
ended device.
Wired BLE/ ULP 485
Wired WIFI
VCC VCC
GND GND
NCP RS485 Output Connector
RS485 +
RS458 -
RS485 GND
NCP RS485 Output Connector
RS485 -
RS458 +
RS485 GND
External Power
VCC
GND