Eagle Electronics CUDA 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 Uniden
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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brand, have input

A few other radio brands (and other electronic devices) that meet the
NMEA 0183 standard won't need these adapters and you will have to

remove the resistor and diode to make those work. This is Wiring
Diagram B, which is described on page 4.

Consult your other device's owner’s manual, then read through all of
the following instructions before you begin. Use the installation
diagram most suited to your brand of radio or other device. If your
device manual indicates an RS-232 connection (i.e., a computer),
remove the resistor and diode and connect using Wiring Diagram B.
Most other connection types (TTL; NMEA + and NMEA –;
differential) will require Wiring Diagram A.

Recommended Tools and supplies

Recommended tools for this job include: wire pliers or wire stripper and a
wire cutter. Required supplies for this job include: two gray (18 gauge) or
blue (16 gauge) wire nuts and electrical tape. Supplies are not included.

Wiring Diagram "A"

Begin by stripping the wire ends of the device you're connecting to the Cuda
240i. (You'll notice the Cuda 240i's data cable comes pre-stripped, with wire
ends exposed.) Use a pair of wire pliers to strip about 1/4-inch (6.35 mm) of
insulation from each of the radio's or other device's data wires.

Strip the ends of the VHF radio's data wires. Connect them to the pre-

stripped wires of the Cuda 240i's data cable (shown right).

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Twist the exposed wires together as shown in the following figures. If

device

Yellow (Transmit)

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.

NMEA Wire (Receive) or NMEA +

Com port to

Cuda 240i

Shield (Ground)

Ground/Shield or NMEA –

To Uniden

radio or other

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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