110-0007509/A
35
Simrad TU40 interface to generic RS-232 synchronization
input
For transmission synchronization purposes, the Simrad TU40 will interface a generic
RS-232 serial line communication port using the CTS (Clear To Send) and RTS (Request
To Send) signals.
The Trigger Unit provides one output and one input for each hydroacoustic system that
needs to be synchronized. Each system is connected to the IO Module inside the Trigger
Unit. Each IO Module in the Trigger Unit comprises an analog input module, a digital
output module and a solid state relay module.
Pin
Signal
Trigger Unit
Signal description
Screen(Green)
Screen
A
Cable screen
Input
RTT
B
Ready to Transmit: Ready to
Transmit (RTT) is a return signal
from the hydroacoustic system that
is synchronized. The Ready to
Transmit (RTT) signal means that the
hydroacoustic system is ready for the
next trigger.
Ground
Ground
C
Signal ground
Output
Trigger Out
D
This signal is transmitted to the system
that needs to be synchronized. Trigger
Out allows the system to transmit
("ping").
Trigger Unit = Connections on the terminal block in the Trigger Unit
A
Local connection on the computer
B
Connections on the terminal block in the Trigger Unit (From left)
Summary of Contents for Simrad NISE 3900E
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