Raymarine L1250D, Owner'S Handbook Manual

Page: 64 / 246

2-32 HD Series Fishfinders
Se
aT
alk
an
d NM
EA
In
For example: 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. Use a multimeter to check the connections.
Figure 2-20 shows how to connect the junction box; Appendix B provides
connection details for specific Raymarine, Apelco, and Autohelm GPS and
Beacon Receiver systems.
Figure 2-20: Using the Auxiliary Junction Box
Data Output
Data is transmitted in SeaTalk and NMEA formats as detailed in Appendix D
and can be used to enhance other equipment as required.
The SeaTalk input/output connection is detailed in SeaTalk Connection on
page 2-29.
Core
Black (screen)
Red
Yellow
Black (screen)
Red
Black (screen)
Red
Yellow
12V
Power
Supply
Spare
Input
Cable
SeaTalk
Power
GPS
Terminal
1
2
3
1
2
1
2
3
Function
0V
+12v
SeaTalk
0V
+12V
0V
+12V
SeaTalk
To GPS
Power Out: 1 & 2
Power In: 1 & 3
To Display Unit
SeaTalk Socket
D4291-1
Fused
81213_1.book Page 32 Monday, March 17, 2003 1:14 PM