Equipment Interfacing; Introduction - NorthStar MX500 Operator's & Installation Manual

Installation Manual
the navigator off. Selecting No cancels the operation, and returns
the unit to normal operation.
b) Hardware Control:
Pressing the
under hardware control. The MX 500 can not be turned on again for
10 seconds when this method is used. Attempting to turn the unit
on during this 10 second period, will only activate the navigator for
as long as the key is not released. This option is not normally
used, and is provided as an emergency alternative to the software
power control.
If the external power to the unit fails for any reason, the navigator will
remember if it was on or off for about 20 minutes. That is if the navigator
was on when the power failed and the power comes back within 20
minutes, the navigator will turn itself on again. Otherwise, it will stay
turned off until the

EQUIPMENT INTERFACING

Introduction

The MX500 has two user NMEA ports. Anyone of these ports can be
used to communicate with other external equipment which utilize the
NMEA 0183 standard. All NMEA interface ports are configured for RS-
422 standard. This configuration complies with NMEA 0183 version 3.0
and earlier. The RS-422 electrical interface will almost always work with
the older NMEA 0183 version 1.5 electrical interface; both of which are
balanced line interfaces. If for some reason you can't get this interface
to work, use an RS232 -to-RS422 interface converter.
212
key for more than 3 seconds, turns the power off
key is pressed.
Installation Notes
Version 3.0