Interphase Twinscope - NMEA 0183 Interface

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Twinscope 8-pin NMEA ADAPTOR CABLE
NMEA 0183 Interface
The Twinscope will accept navigation data from a
separate Loran C, Decca, and GPS receiver in the
NMEA 0183 data format. This interface has been
tested and is verified to work with the Interphase
Pilot GPS but should work with most other GPS
receivers with the proper NMEA output. It features a
unique, fully dedicated microprocessor for the NMEA
0183 data port which provides maximum compatibility
among Loran C, Decca and GPS receivers.
If your equipment conforms to the following NMEA
0183 i nterface protocols, the Twinscope is probably
compatible- BOD, GLL, IMA, WDR, BPI, BWR,
BWC, BER, BEC, GXP, GDP, GOP, GLP, GGA,
RMA, RMB, RMC. Consult your GPS operation
manuals or contact the manufacturer for further
information on interfacing.
The Twinscope needs to be interfaced via the eight-
pin jack on the rear panel of the display unit. The pin
connections are shown at right.
Interphase also offers a NMEA 8-Pin Adapter cable
for the Twinscope as shown at right.
For reference, the internal circuity for the Twinscope’s
NMEA input is shown below. This technical
information may be helpful if you have difficulty with
the NMEA connections.
Data In
(pin 3)
Data Return
(pin 5)
View looking at 8-pin female plug which plugs
into the rear of Twinscope.
5’ 8-PIN NMEA Cable
Part Number 04-1042-000
4N26
+5 V
DATA+
DATA-
510
510
1M
10K
OUTPUT
1
2
3
Rear Panel 3-Pin NMEA Jack
NMEA Input Circuit Showing Protective Opto-
Isolator (4N26)
8-PIN NMEA/SPEED&TEMP CONNECTOR
(located on rear of Twinscope)
1 Speed Data
2 +5VDC
3 NMEA Data
4 N/C
5 NMEA Return
6 + Temp
7 - Temp
8 Shield/Ground
NMEA INPUT
WHITE WIRE....... DATA IN
BLACK WIRE....... DATA RETURN
SHIELD.............. NOT USED
8-pin female
8-pin male