User manual EAGLE CUDA 250 ADDITIONAL INSTRUCTIONS

[. . . ] 1 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 250 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 250 data cable plugs into the accessory socket on the right side of the back of your unit's case. [. . . ] If you're using a Uniden or similar radio, connect the radio's NMEA Wire to the Cuda 250 data cable's yellow wire, and the radio's Ground/Shield wire to the Cuda 250 data cable's black shield wire. If you're using another radio brand or NMEA device, see Wiring Diagram B instructions on page 4. Yellow (Transmit) Com port to Cuda 250 Shield (Ground) NMEA Wire (Receive) or NMEA + Ground/Shield or NMEA ­ To Uniden radio or other device Com port wiring to transmit NMEA information to a Uniden or similar VHF radio or other device. 3 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. 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 250 data cable. You will notice near the end of the cable a segment protected with black heat-shrink. To connect the Cuda 250 to a true RS-232 radio, first remove the Uniden adapter segment of the cable as shown in the following figures. 4 For Wiring Diagram B installations, remove the Uniden adapter segment at the end of your data cable as shown at left. 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. After you have 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 Blue White Cut black, blue and white. Bare wire (shield) Yellow (transmit) 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. 5 If you are using a true RS-232 radio or other device, connect its (+) Receive wire to the Cuda 250 data cable's yellow wire and its ground or (­) Receive wire to the Cuda 250 data cable's bare shield wire. Yellow (Transmit) Com port to Cuda 250 Shield (Ground) (+) Receive or Receive To another (­) Receive or ground 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. Communications Port Activation Now that you have your devices connected, here's how to make them communicate. This unit can connect to either an accessory such as a speed or temperature sensor or a NMEA 0183 data cable. In order to use the Communications Port for NMEA data, you first need to activate NMEA 0183 Output. Press MENU|MENU| to ENABLE NMEA 183 OUTPUT|ENT| to YES|ENT. Enable NMEA command on the unit's Main Menu 6 Communications Port Configuration Once NMEA 0183 Output has been enabled from the Main Menu, the Com Port command appears in the System Setup Menu. It 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. The menu also contains an on/off checkbox to activate NMEA Input, NMEA Output, NMEA GPS Input and a button that allows you to Configure NMEA. 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. [. . . ] When the desired prefixes are checked or unchecked, press EXIT repeatedly to return to the main page display. Compatibility with Various VHF Radios The Digital Selective Calling (DSC) feature in marine radios is relatively new technology. Coast Guard implemented its first DSC-capable systems in Atlantic City, N. J. 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. [. . . ]