Eagle Electronics SONAR 240I S User Manual

Pub. 988-0152-081  
Addendum I  
Additional Instructions for  
Eagle Cuda 240i S/GPS  
Your sonar/GPS unit, the Cuda 240i, functions exactly like the Cuda  
240 described in the manual provided (part 988-0152-012). In addition,  
the Cuda 240i contains a communications port for NMEA 0183 output.  
The instructions for connecting data cables and setting up the  
communications port appear in this addendum.  
NMEA 0183 Data Cable Connections  
NMEA is a standard communications format for marine electronic  
equipment. The Cuda 240i can send information to any device that  
receives NMEA 0183 data. This allows the unit to work with VHF  
marine radios equipped with the Digital Selective Calling (DSC)  
distress call feature.  
To send NMEA 0183 data, the Cuda 240i has one NMEA 0183 version  
2.0 communication port. The com port can be used to send NMEA  
formatted data such as your current position.  
The provided Cuda 240i data cable plugs into the accessory socket on the  
right side of the back of your unit's case. The data cable ends in two wires  
that connect to your VHF radio or other NMEA device. The Cuda 240i uses  
the yellow wire to transmit and the black shield wire for signal ground.  
NOTE:  
Some VHF radios, such as the popular Unidenbrand, have input  
levels which require use of an additional diode and resistor built into  
the Cuda 240i data cable. This is Wiring Diagram A, which is  
described on page 2. The majority of the DSC radios will work with the  
resistor and diode as provided by Eagle.  
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Twist the exposed wires together as shown in the following figures. If  
you're using a Uniden or similar radio, connect the radio's NMEA Wire  
to the Cuda 240i data cable's yellow wire, and the radio's  
Ground/Shield wire to the Cuda 240i data cable's black shield wire. If  
you're using another radio brand or NMEA device, see Wiring Diagram  
B instructions at the end of page 3.  
Yellow (Transmit)  
Shield (Ground)  
NMEA Wire (Receive) or NMEA +  
To Uniden  
Com port to  
Cuda 240i  
Ground/Shield or NMEA –  
radio or other  
device  
Com port wiring to transmit NMEA information  
to a Uniden or similar VHF radio or other device.  
Twist the appropriate wires together, making sure that the exposed  
ends make good contact. Secure the wire ends with wire nuts, then  
wrap each wire nut securely with electrical tape to protect against  
moisture, as shown in the figure on the right.  
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After taping the wire ends individually, wrap the entire connection  
with electrical tape as shown. This will help protect from moisture and  
prevent the wires from breaking contact.  
Wiring Diagram "B"  
If your VHF radio or other device requires true RS-232, you will need to  
remove the diode and resistor built into the end of the Cuda 240i data cable.  
You will notice near the end of the cable a segment protected with black  
heat-shrink. To connect the Cuda 240i to a true RS-232 radio, first  
remove the Uniden adapter segment of the cable as shown in the  
following figures.  
For Wiring Diagram B installations, remove the Uniden adapter  
segment at the end of your data cable as shown at left. Snip off the end  
of the cable protected by the black heat-shrink. At right, we have used  
clear heat-shrink for clarity, so you can see the diode and resistor  
protected within. Remove this portion of the cable.  
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After you've removed the adapter segment, use wire pliers to expose the  
ends of the five remaining wires in the cable. Cut off the black, blue and  
white wires, then seal their ends with electrical tape.  
Black  
Cut black, blue  
Blue  
White  
and white.  
Yellow  
(transmit)  
Bare wire  
(shield)  
After removing the adapter segment, prepare to connect by removing  
and taping off unneeded wires. Strip the end of the yellow wire.  
Strip about 1/4-inch (6.35 mm) of insulation from the yellow wire, then  
follow the preceding wire nut and taping instructions to connect the  
wires from the radio or other device.  
If you're using a true RS-232 radio or other device, connect its (+)  
Receive wire to the Cuda 240i data cable's yellow wire and its ground or  
(–) Receive wire to the Cuda 240i data cable's bare shield wire.  
Yellow (Transmit)  
Shield (Ground)  
(+) Receive or Receive  
(–) Receive or ground  
Com port to  
Cuda 240i  
To another  
NMEA device  
Com port wiring to transmit NMEA information  
to another standard NMEA-compatible device.  
When the data cable is connected to your VHF radio, all you have to do  
is plug it into the sonar/GPS unit. Attach the data cable's plug to the  
accessory socket on the right side of the back of your unit's case.  
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Communications Port Configuration  
Now that you have the devices connected, use the Com Port command  
in the System Setup Menu to make them communicate. This command  
opens a menu that allows you to configure the communications port.  
Menus for changing Com Port settings.  
If you need additional assistance in configuring the unit to communicate  
with another device, consult the factory; customer service phone numbers  
are in the back of the unit's manual. To set Com Port Configuration:  
1. Press MENU|MENU|to SYSTEM SETUP|ENT.  
2. Press to COM PORT|ENT.  
A menu appears with a drop-down Baud Rate selection box highlighted.  
The menu also contains an on/off checkbox to activate NMEA Output,  
and a button that activates the Configure NMEA command (described  
in the following section).  
To set Baud Rate:  
With the Baud Rate box selected (the title bar should be highlighted in  
black, as in the middle figure above), press ENT. A drop-down list  
appears, showing available baud rates. Select the one that matches the  
baud rate on your VHF radio, and then press ENT.  
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To activate NMEA Output:  
From the Communication Ports menu, press to highlight NMEA  
Output. Press ENT to check (turn on) or uncheck (turn off) the NMEA  
Output checkbox.  
To exit the Communication Ports menu, press EXIT|EXIT|EXIT.  
Configure NMEA  
Once in the Communication Ports menu, you can configure the unit to  
use specific NMEA sentences. (The default setting has all NMEA  
sentences turned on.) Press to CONFIGURE NMEA|ENT.  
NMEA Sentences selection menu.  
A menu appears showing the prefixes of the available NMEA sentences.  
A check mark next to a prefix means the prefix is in use. Use ↑ ↓ → ←  
to select a prefix, then press ENT to turn off the prefix. (Press ENT again  
to check the box and turn a prefix on.)  
NOTE:  
The names of the NMEA sentences are abbreviated in this menu.  
These are the functions of the various selectable prefixes:  
GLL transmits latitude and longitude of present position, time of  
position fix, and status.  
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GGA transmits time, position and fix related data.  
APB transmits autopilot information.  
RMC and RMB transmits navigation information messages.  
GSA and GSV transmits fix mode, DOP values and satellites in  
view information.  
DBT transmits the depth below the transducer.  
DPT transmits the depth  
MTW transmits the water temperature.  
4. When the desired prefixes are checked or unchecked, press  
EXIT|EXIT|EXIT|EXIT to return to the previous page.  
Compatibility With Various VHF Radios  
The Digital Selective Calling (DSC) feature in marine radios is  
relatively new technology. The U.S. Coast Guard, for example,  
implemented its first DSC-capable systems in Atlantic City, N.J. and  
Chincoteague, VA in September, 2003. However, the entire U.S. DSC  
rescue system won't be operational until Sept. 30, 2006.  
As more marine electronics manufacturers enter this growing market, other  
connectivity issues with your unit may appear. You can check for known  
compatibility issues by visiting our web site, www.eaglesonar.com. Look  
in the Manuals section for updated documents for your sonar/GPS unit.  
This addendum supplements the manual Cuda 240, part number 988-0152-012.  
Pub. 988-0152-081  
© Copyright 2004  
All Rights Reserved  
Eagle Electronics  
Printed in USA 022704  
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