NORBIT iWBMS - Page 20

10.4.3 User Manual Contents April 17, 2020
Firmware: 5.2.1 Page 20 of 142
iWBMS Sonar Interface Unit (SIU-I-NAV)
PN: 29028
* Please note that NORBIT has a split serial option. This option allows for ASCII/Binary output of
GNSS/INS information to 3 serial connections. Please contact NORBIT support for more information.
**Please note that SIU-I-NAV and SIU-I-Compact-NAV models 29028-5, 29029-3 and newer will not
have the 12A fuse in the rear. Instead there will be an internal 20A fuse.
The SIU will shut down automatically at 70°C to prevent damage to electronics due to overheating.
Connector
Description
Sonar LEMO
18-pin interface to sonar and IMU
Ant 1 TNC
Primary GNSS antenna. Antenna closest to WBMS
Ant 2 TNC
Secondary GNSS antenna
GPS RS-232*
GNSS corrections input (RTK/DGPS)
PPS BNC
1 PPS output for external sensor (not typically used)
Ethernet RJ45
For communication between topside PC and sonar
SAMTEC Part# RCE-01-G-05.00-D
AUX LEMO
10-pin interface for communication with auxiliary devices
Power LEMO
Fuse Socket**
Input DC voltage
Rear; 12A slow blow