Connector panel of the BDU
98-175666-C
Chapter 3: Interfaces
3-3
To accommodate the gyro cable use the terminal block (DIN Rail Adapter 31-208142-
000). The pin numbers on the adapter are the same as on the RJ-45 plug.
NMEA 0183
The NMEA 0183 connection supports IEC 61162-1 and IEC 61162-2.
• IEC 61162-1, baud rate 4800, format 8N1.
• IEC 61162-2, baud rate 38400, format 8N1.
The baud rate is auto detected by the BDU, the user cannot configure this interface.
Supported NMEA strings in order of priority:
1. HEHDT (North seeking Gyro compass)
2. GPHDT (GPS compass)
3. HNHDT (Non-North seeking gyro compass)
4. IIHDT (Integrated Instrument)
5. HCHDT (Magnetic compass)
Recommended NMEA 0183 cable:
Ethernet Cat. 5 or better.
Figure 3-2: Gyro input, terminal block
Note
Any HDT sentence is supported as long as it complies with the following
header format: "$xxHDT" where xx can be two characters e.g. IN for $INHDT.