nmea0183 usb isolated adapter

Compatible with marine equipment NMEA

    ADM2484 provides galvanic isolation, short circuit protection, and electrostatic discharge circuitry
    bi-directional isolated serial data transfer- baud rate 300 to 1,000,000- mini usb connector
    works with RS422 and RS232.
    ch340 usb serial converter supports linux/windows/mac
    1500 volt isolation prevents ground loops and equipment damage
    protected from transients by TVS diode
    low current consumption
    3d printed enclosure
    tested with standard horizon GX2100 receiving AIS messages into OpenCPN
    tested with NMEA depth sounder

rs422 connections A and B are inputs, Y and Z are outputs
rs232 use A NMEA common, B NMEA IN (+), Y NMEA common, Z NMEA OUT(+)

leds indicate data is being sent and or received. If led stays lit without data, there is a wiring problem. Ensure both A and B for receiving and/or Z and Y for transmitting\
 are secured. From a serial console ensure baud is correct. NMEA uses 4800 8N1, or 38400 8N1 for high speed such as AIS. If data is received but garbage, try reversing A/B o\
r Y/Z. Recognized on linux as /dev/ttyUSB* Other OS may require drivers

schematic
3d printed enclosure