User's Manual Part 1

19
SERIAL INTERFACES
The NAV-7 has an IEC 61162-2 compatible serial interface which can be used to
connect the NAV-7 to other equipment such as an integrated bridge system or a PC
running charting software.
The interface operates all the time that the NAV-7 is switched on – there is no
ON/OFF control for the interface.
The IEC 61162-2 compatible serial interface also allows the connection of a serial
printer.
Connecting a Printer
The recommended external printer is the Seiko DPU-414; the default printer
parameters are set correctly for this model. The printer should be connected to the
NMEA port of the NAV-7 (the 9-way D-type socket at the rear):
DPU-414 pin 3 (RxD) to NAV-7 pin 7 (TxA)
DPU-414 pin 5 (Gnd) to NAV-7 pin 2 (TxB)
After connecting the printer, set the 'Printer port' parameter to 'NMEA port' on the
Setup mode : Serial options page and ensure that the 'Bridge port' and
'Alarm port' parameters are set to either 'IBS' or 'None'. Set the ‘NMEA port speed’
to 4800.
The printer is powered by the mains adaptor supplied.
The printer 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.