Simrad TP22 Instruction Manual download pdf (Page 23)

Instruction Manual

E04818 Issue 1.0

NMEA

talker unit

NMEA Out

Data/+

NMEA Out

Common/-

Tillerpilot

NMEA

Data

(Red)

Common

(Blue)

5.5 Interfacing via NMEA

The inbuilt NMEA processor allows NMEA 0183-compatible

equipment to be connected directly to the TP22 and TP32, with-

out any need for a separate interface unit (Fig 5.12).

If a GPS or chartplotter is connected to the Tillerpilot, it can

extract the data necessary for Nav mode. Other functions, such

as Steer To Wind, may also be available if NMEA 0183-

compatible instruments are transmitting the correct NMEA sen-

tences.

When connecting an external (“talker”) unit to the Tillerpilot,

two terminals are used – usually labeled DATA and COMMON

(or COM). These should be connected to the Tillerpilot’s

NMEA cable as follows:

Fig 5.12 - NMEA integration examples

NMEA0183

SpeedWind

SimNet

Tillerpilot power

GPS/Chartplotter

Note Some third party equipment does not have a dedicated COM-

MON connection. In this case, the DATA connection will usual-

ly be labeled NMEA OUT and the NMEA Common wire from

the Tillerpilot should be connected directly to 0V (terminal 2).

If in any doubt, refer to the manufacturer or Simrad’s Product

Support department for advice.

CAUTION Due to the limitations of NMEA 0183, it is recommended that

only one talker is transmitting to the Tillerpilot at any one

time – i.e. instruments or GPS/chartplotter, not both simul-

taneously! If more than one unit needs to be interfaced to

the Tillerpilot, these should be connected to the NMEA cable

via a changeover switch.

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Simrad TP22 Instruction Manual Page 23

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