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Appendix 5: Digital Interface
AP-72
VSD - UAIS Voyage static data
Transmit of sentences:
Expected nominal interval of sentences: on demand
1. Type of ship and cargo category, 0 to 255
9. Regional application flags, 0 to 15
Serial Interface
Radar processor unit: Input ports
Heading sensor
Baud rate is fixed at 38.4 kbps. Complies with IEC 61162-2.
LTC1535
Isolated RS485 Transceiver
Logical High: A-B> +0.2V
Logical Low: A-B< -0.2V
RD-A
RD-B
GND
Absolute maximum rating
Input
Forward current: 50 mA
Reverse voltage: 6 V
Output
Supply voltage: 16 V
High level output voltage: 16 V
Low level output current: 50 mA