Simrad argus - Serial Line 2, Ais

Argus Radar - SERIAL INTERFACE SPECIFICATIONS
988-10187-004 2.3
2.2 Serial Line 2, AIS
It is possible to receive RS422 or RS232 standard signal at 4800 and 38400 bps on TB8
(FNMEA 2). Note that the circuit is able to receive at 4800 and 38400 bps also with RS232
connection, but this is not a standard connection according to the IEC 61162-2 standard.
SCHEME 2
IN +
IN -
SHLD
OUT+
OUT-
GND
RS 422 Interface Listener Connection
+ IN
. "A" Data Input
- IN
. "B" Data Input
SHLD
. “C” insulated Ground
Input Load
. ≥ 7 KΩ
RS 232 Interface Listener Connection
.
- IN
. RX Data Input
SHLD and + IN
. Insulated ground
Input Load
- ≥ 7 KΩ
RS 422 Output Talker Connection
+ OUT
. "A" Data Output
- OUT
. "B" Data Output
GND
. “C” Ground
Output Drive
- 150 mA
-
This serial line complies to IEC 61162-1 and IEC 61162-2.
Accepted sentences: VDM, VDO and ALR.
Send sentences TLB, TTD and ACK.
VDM – AIS VHF data-link message
Defined in ITU-R M.1371 and as received on the VHF Data Link (VDL), using the “six-bit”
field type. The structure provides for the transfer of long binary messages by using multiple
sentences.
Data messages should be transmitted in as few sentences as possible. When a data
message can be accommodated in a single sentence, then it shall not be split.