6
0746-SOM-00002 - 02
© Tritech International Ltd.
3. Electrical Installation
3.1
Power Supply Requirements
The sonar requires a regulated and smoothed DC power supply between 19V and 74V. Power is normally supplied
via the vehicle while in service or can be supplied via an external PSU as part of a deck test kit.
WARNING
Power should only be supplied to the Gemini through the MAIN port. The AUX
port power is supplied via pass through from the MAIN port.
Never try to make the Gemini work down a long cable by increasing the PSU
output voltage above 74V DC.
3.2 Electrical Connections
Connection to the sonar main and auxiliary ports are via
the Impulse MKS(W)-307-FCR bulkhead connectors on
the back of the sonar as shown in the picture opposite.
Note the key way on the sonar connector is in the
downward position.
A subsea cable whip supporting Ethernet communications
can be supplied by Tritech.
The tail end of this whip cable should be terminated with
a cable connection or penetration suitable for the end
user application.
Cable
Connector
View
Sonar
Bulkhead
View
Main Port
Aux Port
Pin
Function
Pin
Function
1.
0 VDC
1.
0 VDC
2.
+ V
2.
+ V
3.
Chassis / Earth
3.
Chassis / Earth
4.
Ethernet RX +
4.
TTL IN
5.
Ethernet RX -
5.
RS232 GND / TTL GND
6.
Ethernet TX +
6.
RS232 TX
7.
Ethernet TX -
7.
RS232 RX
Warning
Application of excessive or reverse supply voltage to the unit or supply voltage
across any of the communication connections may lead to equipment damage
not covered under the warranty conditions.
