SeapiX – Operation Manual
SSD-C-1302 Ed. A – 01/2020 26
4.1.2 TRANSDUCER CABLE AND INTERFACE UNIT (ITU)
Once connected to the SAU, passed through the hull and tightened by a cable gland, the
transducer cable has been connected to the Interface Unit (ITU).
Location
The ITU is installed either in a dedicated sonar room or into a technical room, fairly close to
the SAU (transducer cable length = 20 m).
The connectors are located at the back of the ITU:
ITU back face and connections
• The ITU power cable is plugged into a 110 VAC or 230 VAC electrical outlet.
• The ITU-BFU control command cable - with DE-9 female termination on ITU side - is
connected to the DE-9 male port (labeled COMMAND LINK).
• The ITU-BFU Ethernet cable is connected to the RJ45 port (labeled DATA LINK).
The transducer cable from the SAU is connected to the Fischer port
(labeled TRANSDUCER) – both red dots, on cable and on port, matching upwards.