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Rear Panel Connections
The auxiliary alarm contact is capable of switching up to 24 V DC at up to 1A
(inductive load). The contacts are not connected to any internal voltages.
The power supply input is isolated from the case and antenna. It must remain
within the range 10.8 – 31.2 V DC (12/24 V DC nominal) at all times.
Connecting a Printer
The recommended
external printer option is the Seiko DPU-414; the default printer
parameters are set correctly for this model. The printer should be connected to COM
2 of the SMARTFIND GMDSS NAVTEX (the 9-way D-type socket at the rear):
DPU-414 pin 3 (RxD) to SMARTFIND GMDSS NAVTEX pin 7 (TxA)
DPU-414 pin 5 (Gnd) to SMARTFIND GMDSS NAVTEX pin 2 (TxB)
TNC RF connector
1
/
8
” Spade terminal – ground pin
9-way D-type – COM 2
15-way D-type – power and COM 1 and alarm relay
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After connecting the printer, set the 'Printer output' parameter to COM 2 on the
Setup mode: Serial options
page and ensure that the ‘NRX output’ and 'Alarm
output' parameters are set to either 'IBS' or 'None'. Set the ‘COM 2 port speed’ to
4800.
The printer is powered by the mains adaptor supplied and must be configured for
correct operation. The standard default settings for the printer should be used, except
for the following:
SW-1 Set for serial interface (not parallel)
SW-2 Set for English (not Japanese)
SW-3 Set for XON/XOFF control (not H/W BUSY)
SW-3 Set for 4800bps (not 75bps)
Refer to the DPU-414 manual for details of how to set these parameters.
The compass safe distance for the printer is 1.0 m.
The printer should be secured to prevent it moving during operation. The use of
adhesive foam pads is recommended.
ANTENNA INSTALLATION
Selecting a suitable antenna
The SMARTFIND GMDSS NAVTEX receives transmissions on three frequencies. 518
kHz transmissions are in International English; 490 kHz and 4209.5 kHz
transmissions may be in a local language.
To receive on all frequencies the SMARTFIND GMDSS NAVTEX must be used with a
wide frequency (400 kHz to 5 MHz) antenna that covers 518 kHz, 490 kHz and
4209.5 kHz.
If you have purchased the SMARTFIND GMDSS NAVTEX receiver without an
antenna then a suitable active NAVTEX antenna should be used. Orolia Ltd
recommends the 905-05 as described in the following section.
If an alternative antenna type is used it must be a low impedance 50 ohm
antenna or an antenna with a 50 ohm matching network.
A mismatched or high
impedance whip or wire antenna should not be used as the operational range of
NAVTEX reception may be greatly reduced; it is also important that the antenna is
capable of reception over the frequency range specified above.
Wire or long whip antennas must be fitted with a 50 ohm matching transformer.
Important,
disable the SMARTFIND GMDSS NAVTEX antenna power setting – refer
to Setup – Receiver mode for details. If in any doubt a qualified GMDSS installer
should be consulted.
