External Switches; Srm Button - Weatherdock easyTRX2S Handbuch

If you want to operate the easyTRX2S Transceiver with a chart plotter
please connect the devices with your plotter.
Based on the cable assignment paragraph 5(under position 1 and 2 in
the spreadsheet) the green and white cables of the 6-pole cable are
necessary.
Please connect the cable to the plotter ground, the white cable
„contains" the AIS data. This white cable has to be connected to the
NMEA data input of the chart plotter. If the plotter interface is
configured to 38400 baud and the plotter is ready for AIS data,
received data will be shown immediately.

8.5 External switches

Connector: SUB D 15 male connector
It is possible to connect external switches to all easyTRX2S devices.
Moreover you have the opportunity to connect an external buzzer for
the integrated AIS S.A.R.T. and CPA alert.

8.5.1 SRM button

Connector: SUB D 15 male connector
According to the cable assignment under paragraph 5 (Pos. 7 and Pos.
8 in the spreadsheet), the green and white cable of the 4-pole cable
are destined for this functionality. If you connect these cables with a
push button (not a SWITCH) of your switchboard and close together
the cables with the button, a SRM (Safety related message) is sent by
the device.
The preset SRM message which is transmitted is called:
PAN PAN PAN. Subsequently the SRM LED starts flashing for one
minute. When this LED stops flashing you may send another SRM
message at the push of the button. (As a consequence more frequent
transmission than one SRM per minute is not possible which
corresponds to international AIS regulations. Please do not connect a
switch with the cables. A permanently connected switch does not lead
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