Lowrance X125, X136DF, X126DF, X135 User Manual

Pub. 988-0151-201

Addendum I

Operation Instructions for

X125, X126DF, X135 and X136DF

This addendum addresses the manual for the units listed above (part 988-0151-171). Since the manual was written, several changes have occurred to the described units. These changes will affect the installation and operation of your unit, and include:

Speed/Temperature Sensors

•Please disregard the temperature sensors list on page 20 of your unit's manual (as well as the chart on page 21). Your unit requires an analog temp sensor, so it can only recognize the TS-1BL. However, the Sonar socket on your unit is designed to read only one temperature signal. Since your transducer contains a built-in temp sensor, attaching the TS-1BL to your unit's Sonar socket will override the information provided by the transducer. If you are using a shoot- thru-hull installation or for some other reason prefer to measure temperature somewhere other than at the transducer's face, see the accessory ordering information inside the back cover of the manual.

•These units use the SP-BL speed sensor, which functions exactly like the SP-X sensor described on page 22 of your unit's manual. (Again, disregard the drawing on page 21.) This speed sensor is optional for the X125 and X135; it comes packed with the X126DF and X136DF. The SP-BL should be directly connected to the Sonar socket on the back of the unit. A Y-adapter built into the SP-BL cable allows you to connect the transducer. The figures on pages 5-6 of this addendum show proper connections.

Power and Cable Connections

• These units now ship with a power cable significantly different from the one shown on pages 24 and 25 of the manual. Details on this new cable and how it affects your power connection appear in this addendum beginning on page 2.

NMEA 2000 Network Connection

•The X135 and X136DF can connect to a NMEA 2000 network buss. Connecting to a NMEA 2000 network allows multiple sonar units to receive information from a single sensor. It can also let a single sonar unit receive information from multiple sensors.

•Detailed instructions for powering a NMEA 2000 buss and connecting one of these units to a NMEA 2000 network appear in this addendum.

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Power and Cable Connections

Your unit comes with a power/data cable that splits into three ends, each with several exposed wires (shown in the following figure). The end with 4 wires (blue, yellow, orange and shield) is a Data cable that connects to a NMEA 0183 interface. The end with three wires (red, black and shield) is a power cable that connects to a NMEA 2000 buss. The thicker three-wire cable (red, black and white) is the Power Supply for your unit (the white wire is unused).

Power Supply wires: red, black and white

To unit

NMEA 2000 Power wires: red, black and shield

NMEA 0183

Data Cable wires: blue, yellow, orange and shield

The Power/Data cable for this unit.

Your unit will not use all of these wires. The following segments include instructions for installing all the wires that you will use with this unit.

Caution:

All of the wires in the power/data cable have bare ends for easier installation. The bare ends on any unused wires could cause an electrical short if left exposed. To prevent this, you should cover the individual wire ends – either by capping them with wire nuts or wrapping them with electrical tape. (You should cut off the bare wire before taping off the ends.)

Powering a NMEA 2000 Buss – X135 and X136DF Only (NMEA 2000 Power cable)

A NMEA 2000 buss must be connected to a power source to operate. If you have a pre-existing NMEA 2000 installation, it may already be connected to another power source. If your NMEA 2000 buss is already powered, you can ignore the NMEA 2000 Power cable. Never attach two power sources to a single NMEA 2000 buss.

If you do need to power your NMEA 2000 buss, attach the NMEA 2000 Power cable to your boat's battery just as indicated in the following segment for connecting your unit's Power Supply cable. The NMEA 2000 Power cable's red wire should be attached (with provided 3-amp fuse) to the boat battery's positive terminal, and the NMEA 2000 Power cable's black and shield wires should both be attached to the battery's negative terminal.

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NOTE:

If your boat does not have a NMEA 2000 buss, do not connect the NMEA 2000 wires!

Powering Your Unit

(Power Supply cable – red and black wires)

The unit works from a 12-volt battery system. For the best results, attach the power cable directly to the battery. You can attach the power cable to an accessory or power buss, however you may have problems with electrical interference. Therefore, it's safer to go ahead and attach the power cable directly to the battery.

If possible, keep the power cable away from other boat wiring, especially the engine's wires. This will provide the best isolation from electrical noise. If the cable is not long enough, splice #18 gauge wire onto it. The power cable has two wires, red and black. Red is the positive lead, black is negative or ground. (There is also a white wire to power an optional external speaker for some units.) Make sure to attach the in-line fuse holder to the red lead as close to the power source as possible.

For example, if you have to extend the power cable to the battery or power buss, attach one end of the fuse holder directly to the battery or power buss. This will protect both the unit and the power cable in the event of a short. It uses a 3-amp fuse.

To power a NMEA 2000 buss, also connect NMEA 2000 Power cable to the boat's battery.

	External speaker wire
To unit	(not used by this unit)
	Black wire

Optional power off
switch for salt-	12 volt
water installations	battery

Red wire with 3 amp fuse

NMEA 0183 NMEA 2000 Power Cable Data Cable

Power connections for this series of Lowrance sonars.

NOTE:

If you're powering a NMEA 2000 buss, you will attach both the NMEA 2000 Power cable and the unit's Power Supply cable to the boat's battery. To attach the NMEA 2000 Power cable, connect the red wire to battery's + and black and shield wires to battery's –.

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