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 _NotUsed_ 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 _NotUsed_. Each IO Module in the _NotUsed_ comprises an analog input module, a digital output module and a solid state relay module.
Pin Signal Signal description
Screen(Green) Screen Cable screen
Input RTT 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 Signal ground
Output Trigger Out This signal is transmitted to the system that needs to be synchronized. Trigger Out allows the system to transmit ("ping").
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A Local connection on the Processor Unit
B Connections on the terminal block in the Trigger Unit (From left)
Unless otherwise specified, this cable must be provided by the installation shipyard.
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A Input (Ready to Transmit (RTT))
B Ground (Signal ground)
C Output (Trigger Out)
D Screen (Cable screen) (Green)
E Make the connections here.
F Channels (From left)
The default version of the Trigger Unit has 12 channels to control up to 12 hydroacoustic systems.
Minimum cable requirements
•  Conductors2 x 2 x 0.5 mm2
•  ScreenOverall braided
•  Voltage: 60 V
•  Maximum outer diameterDefined by the plugs and/or the cable gland
If you need to install a very long cable, increase the cross section.