Raymarine Combined Pathfinder Radar, RL80CRC PLUS manual Using the SeaTalk Auxiliary Junction Box

Chapter 8: Installation 8-29

Using the SeaTalk Auxiliary Junction Box

A junction box (provided with the radar/chart and chart displays; optional with the radar displays) is used to connect the SeaTalk system to the hsb2 series display unit. This junction box enables the SeaTalk bus, power and GPS to be connected.

If power is not already available (via another SeaTalk instrument), the junction box can be used to apply power to the SeaTalk bus for other applications. The junction box may also be used for other purposes, e.g. supplying power to a flux gate compass and routing the compass data to the hsb2 series display NMEA In connection, or alternatively, for connecting a NMEA GPS system.

The junction box includes:

•SeaTalk cable and connector to attach to display unit

•Power cable to connect to 12 V power (if required)

•Input connections to connect SeaTalk cable from external equipment

•Spare connections for another instrument

CAUTION:

Ensure correct polarity of the 12 V supply before applying radar or

SeaTalk power. It is recommended that a multimeter is used to check the

connections.				AuxiliaryJunction
Figure 8-18shows how to connect the junction box; Appendix B provides
connection details for specific GPS and Beacon Receiver systems.
			SeaTalkUsingthe		Box
To Display Unit			To GPS
			Power Out: 1 & 2
SeaTalk Socket
			Power In: 1 & 3
12V			Spare
Power
Supply			Input
Fused
Cable	Core	Terminal	Function
SeaTalk	Black (screen)	1	0V
	Red	2	+12v
	Yellow	3	SeaTalk
Power	Black (screen)	1	0V
	Red	2	+12V
GPS	Black (screen)	1	0V
	Red	2	+12V
	Yellow	3	SeaTalk
			D4291-1

Figure 8-18: Using the Auxiliary Junction Box