Raymarine Pathfinder Radar RL70C PLUS User Manual

Appendix B: Using the Auxiliary Junction Box

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The SeaTalk Auxiliary Junction Box is used to connect SeaTalk GPS and 
Differential beacon receivers to your 

hsb

 series display.

Note: With the exception of the Raystar 114, when you use the following Dif-
ferential Beacon Receiver configurations, the receiver must be set to AUTO 
MODE in the GPS Set-Up page. Manual selections will not be accepted. Refer 
to Chapter 6 for details.

The recommended method of providing position, course over ground and 

speed over ground information to the 

hsb

 displays is by connection to a 

SeaTalk GPS. The 

hsb

 series chartplotter displays are supplied with an 

Auxiliary Junction Box, whose main purpose is to make this connection 
easier. The junction box has two flying leads, one with a SeaTalk plug for 
connection to the display and the other lead is for connection to a 12V power 
supply (the display does not provide power for the GPS). 

The following sections detail the connections to the Auxiliary Junction Box 
for several different types of GPS, including a beacon receiver if installed. 
Except for Raystar 114, the differential beacon receivers used are Raymarine 
NRD-2A, Apelco BR101 and the Autohelm Beacon Receiver.

The connections detailed in the following sections ensure that the GPS will 
always operate in SeaTalk mode. Note that the Raystar 112LP must be the 
SeaTalk version.