Raymarine 530 - Manual (Page 137)

Chapter 6: Installation 6-21
Usi
ng t
he
Sea
Ta
lk
Aux
ili
ary Ju
nc
ti
on
Bo
x
Figure 6-11: NMEA Input Connection
Using the SeaTalk Auxiliary Junction Box
A junction box (provided with the chartplotter display) is used to connect the
SeaTalk system to the 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
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 SeaTalk
power. It is recommended that a multimeter is used to check the
connections.
Figure 6-12 shows how to connect the junction box; for details specific to
your GPS, refer to the handbook supplied.
+12 V
0V
+ NMEA Data (orange)
-- NMEA Data (yellow)
D3604-1
Red
Black
Yellow