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DS41 Owner’s Manual

16

The DS41 can be configured to operate as a
NMEA repeater. In this mode it will display depth
information from any depth sounder outputing
DPT or DBT  NMEA depth data (no other NMEA
depth sentences are supported).

Notes:

1) The only information displayed from

the DPT and DBT sentence is depth
below the transducer. The user must
enter keel offset values and alarm
settings as required.

2) When a slave has no depth

information, the display will alternate
between -- and -SL. This will occur if
the master unit has no depth reading
or if the data link from the master is
inadvertently broken.

Brown (NMEA data input)

A (+)

B (-)

Orange

Black

Red

1A Fuse

+12 VDC

Ground

Optional External D.C. Buzzer

ON/OFF
Switch

NMEA

Output

+

_

(12V, 100 mA maximum)

Note: Transducer

not connected

Ground

Horizon

Depth

OFF

ON

DS41 Operating

as NMEA repeater

Depth Sounder

with NMEA (DPT) output

To set the DS41 to repeater mode:
1. Connect the NMEA data and DC power as

shown in the following diagram.

2. Apply power to the instrument and

configure it for slave operation as
described in the Instrument Setup
section (Dual Station Operation).

Appendix B – NMEA Repeater Mode

Summary of Contents for DS41

Page 1: ...tal Depth Sounder Owner sManual Standard 2 Inch Installation Dual Station Operation NMEA Repeater Reads in Feet Fathoms or Meters Adjustable Prop or Surface Offset Shallow and Deep alarms Dual Station Operation ...

Page 2: ...sure 5 Troubleshooting 6 What comes with your Digital Depth Sounder 7 Standard 7 Options 7 Replacement Parts 8 Installation 9 Face Plate Installation 9 Instrument Installation 9 Transducer Installation 11 General 11 Sailboats 12 Powerboats 12 Transom Installation 13 In Hull Installation 13 Appendix A Dual Station Operation 14 Master Slave Selection 14 Linked or Separate Selection 15 Appendix B NME...

Page 3: ... 5 VDC to 16 5 VDC Operating Temperature 0 C to 50 C 32 F to 122 F Current Drain 150mA max including internal buzzer Data Input Output Single wire data output Input Dual station mode outputs NMEA DPT sentence Dual station inputs NMEA DPT sentence In the linked mode a dual station pair also transfer function settings eg Alarm on off NMEA Output DPT NMEA Input DPT and DBT External Buzzer Output 12VD...

Page 4: ...e lower right corner of the display will show next to the Alarm Bell to indicate that the alarms are on 120 OFF ON ON V To turn the alarms off press the OFF key The arrow in the lower right corner will extinguish 120 OFF OFF ON V V Note The arrow will flash if alarms are turned ON but the shallow alarm is individually set to OFF See next section Shallow Alarm To set the shallow alarm 1 Press the k...

Page 5: ...e disabled by pressing both the and keys for 5 seconds The word will be displayed but the alarm depth will be retained for future use Press for 3 Seconds Instrument Setup Keel Surface Offset An offset may be automatically added to or subtracted from the depth reading to compensate for the location of the transducer This allows the instrument to indicate the water depth relative to the bottom of th...

Page 6: ...ottom The setting is used to increase the required level that shallow echoes must meet before they will be displayed If the D41 gives repeated false readings of 1 5 to 3 feet depth while in deep water the transducer setting should be increased Adjust it upward by 0 5 at a time and retest The range of values is 0 9 to 2 5 If the value is set too high it could cause erratic readings in shallow water...

Page 7: ... of corrosion Erratic readings while moored Check transducer for growth or multiple coats of paint Erratic readings while moving Cavitation air under the face of the transducer Review installation and reinstall if necessary Erratic readings only while engine is running 1 Re route power and transducer cables away from engine ignition wires and battery cables 2 Add feed through filter capacitor on t...

Page 8: ...r Standard Mounting Bracket With mounting hardware Extension Power Cord 6 feet long with quick disconnect connectors Twist Lock Face Plate Round Options DTS50 Plastic Low Profile Transducer DTS51 Transom Mount Transducer DTS52 Bronze Long Stem Thru hull Transducer ...

Page 9: ...e ordered from the Parts Department To order call Toll free Number 1 800 487 2788 Square Face Plate Part Number 568001012A Round Face Plate Part Number 568002012A Gasket Part Number RRDS410001 Mounting Bracket Part Number 160001020A Mounting Nut Part Number 580010123A DTS53 Bronze Low Profile Transducer DTS55 In Hull Transducer ...

Page 10: ...directly as possible minimising the length of cable where practical Location should provide as much protection from the elements as possible The panel for mounting the instrument should be 1 8 to 3 4 inch thick The space behind the instrument panel must have a depth of at least 3 75 inches See Figure 1 for dimensions of the instrument 2 Drill a 2 inch hole on the instrument panel in the selected l...

Page 11: ...der Installation FACE PLATE INSTRUMENT PANEL WALL MOUNTING BRACKET MOUNTING NUT DEPTH SOUNDER BODY 7 Obtain the power from a 12 V source as directly as possible Avoid power circuits which share loads with ignition alternators radio transmitters etc Excessive electrical noise associated with such devices may prevent the instrument from operating properly 8 Connect the RCA phono plug on the transduc...

Page 12: ...as taken place Erosion is caused by turbulent water and these areas are unsuitable transducer mounting locations It is very important that the mounting location have reasonable access from inside the vessel since the transducer will require tightening from inside the hull Plastic thru hull transducers should be mounted in fiberglass and metal hulls only Under no circumstances should they be used i...

Page 13: ...h as trawlers the transducer should be mounted amidships relatively close to the keel centerline of the hull On planing powerboat hulls the transducer should be mounted well aft and close to the keel to ensure that the transducer is in contact with water at higher boat speeds If the vessel is capable of speeds greater than 25 knots you may wish to review installation location and operational resul...

Page 14: ...side the hull construct a water box to be used for installation 4 Use a PVC pipe with one end threaded and supplied with a screw on cap The PVC pipe should be 1 4 inch bigger than the bottom face of the transducer 5 Install the transducer as shown in Figure 7 6 To receive a proper echo from the bottom the bottom of the PVC pipe may have to be cut at the deadrise angle of the hull Transom Installat...

Page 15: ...depth received from the master but have independent alarm settings and keel offset values Note The instrument designated as the master device is the only instrument connected to the depth transducer See the Wiring Connection section for dual station wiring details Also see the Instrument Setup section for configuration details Master Slave Selection To select the master slave mode of operation 1 A...

Page 16: ...tation pair of DS41 instruments automatically keep the following settings the same in both instruments Alarms On Off Alarm Values Deep and Shallow Keel Offset see note Units of measure see note Example Switching an alarm off on the slave instrument will also switch the alarm off on the master instrument The reverse also applies alarms changed on the master will be automatically changed in the slav...

Page 17: ... between and SL This will occur if the master unit has no depth reading or if the data link from the master is inadvertently broken Brown NMEA data input A B Orange Black Red 1A Fuse 12 VDC Ground Optional External D C Buzzer ON OFF Switch NMEA Output _ 12V 100 mA maximum Note Transducer not connected Ground Horizon Depth OFF ON DS41 Operating as NMEA repeater Depth Sounder with NMEA DPT output To...

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