Furuno FCR-2107 series - Serial Interface, LAN Adapter - Output Port

Appendix 5: Digital Interface
AP-74
Serial interface, LAN adapter - output port
AIS output port: Baud rate is fixed at 38400 bps. Complies with IEC 61162-2.
Other port: Baud rate is fixed at 4800 bps. Complies with IEC 61162-1.
Output port (TD-A, TD-B)
SP487
TD-A
GND
Isolated RS485 Transceiver
Logical High: A-B> +4.0V
Logical Low: A-B> -4.0V
TD-B
Absolute maximum rating
Output
Supply voltage: 7V
High level output voltage: 7V
Low level output current: 50mA