Skanti TRP 9250, Technical Manual, Page: 96 / 289

NMEA
3 way terminal strip
NMEA 0183 interface for navigation equipment.
Baud rate: 4800 bps
PCB 717S must be installed.
NMEA
Terminal Designation Description
1 NMEA RX+ Galvanically isolated input.
2 NMEA RX-
3 Screen Not connected.
Navigation equipment complying with the NMEA 0183/IEC 1162 standard may be connected for
automatic updating of the position information used by the DSC/Telex modem.
The NMEA receive circuit consists of an opto-isolator with a 3.3 kohms series resistor to insure
current mode operation and a shunt diode to limit reverse bias. The circuit is isolated from earth.
The circuit operates with a minimum differential input voltage of 2 volts. The maximum voltage is
15 volts, compatible with RS-232 levels.
Interconnection between devices may be by means of two-conductor shielded twisted-pair wire.
Multiple listeners may be connected to a single talker. The receivers are connected in parallel. The
shield should be connected to the navigator chassis and should not be connected at any listener.
However the shield should be continuous (unbroken) between all listeners.
Following NMEA 0183/IEC 1162 sentences are recognized by the equipment for extraction of
position and associated time information: GGA, GLL, GXP, GDP, GLP, GOP.
CONNECTORS FOR EXTERNAL EQUIPMENT INSTALLATION
TRP 9250 TECHNICAL MANUAL 3-25