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APPENDIX
AP-29
Serial interface – output ports
TT for ECDIS
Baud rate for output sentences are set on the Initial Settings menu. Complies with IEC
61162-1.
SN751178NS
Dual differrential
drivers and receivers
TD-A
TD-B
Logical High: A-B> +0.2V
Logical Low: A-B< -0.2V
=
=
Serial interface – input/output ports
Baud rate is fixed at 38.4 kbps. Complies with IEC 61162-2.
AIS Input port (RD-A, B)
LTC1535
Isolated RS485 Transceiver
Logical High: A-B> +0.2V
Logical Low: A-B< -0.2V
RD-A
RD-B
GND
AIS Output port (TD-A, B)
LTC1535
Isolated RS485 Transceiver
Logical High: A-B> +4.0V
Logical Low: A-B> -4.0V
TD-A
TD-B
GND