DST-2 Module User Manual version 1.30.indd
Contents
1. connects to NMEA and NMEA B connects to NMEA 2006 Active Research Limited The different NMEA standards The NMEA 0183 specification has slowly evolved over the years so connecting one device to another is not always a straight forward matter The earlier versions of NMEA 0183 before v2 0 as detailed above used slightly different connection methods and signal levels the instruments had just one NMEA data line Tx or Out and used the ground as the other line similar to the way a computer serial port works This connection method is referred to as single ended instead of the differential method used by NMEA 0183 v2 0 devices The data format is largely the same between both systems with v2 0 adding some extra sentence strings and removing older redundant sentence strings from the specification The situation is further complicated as many manufacturers still use the old single ended method of connection because it is cheaper to implement So how can an older type NMEA device be connected to a newer type device Care is needed it is possible to damage or overload the output of a newer differential device if it is incorrectly connected to an older device This is because the older devices used ground as the return whereas the newer devices actually drive the NMEA B line between 5v and Ov Thus connecting this output to ground will result in high cu2. inside In this case use one pair for the TX line and one for the RX line Use the spare wire in each pair as ground and connect the cable shield to ground only at the computer end 3 The TX of the DST 2 should be connected to the RX of the computer standard D type pin 2 and the DST 2 RX should be connected to the TX of the computer pin 3 The GROUND of the DST 2 should be connected to the PC s ground pin 5 2006 Active Research Limited Connecting to the battery supply The Actisense DST 2 should be wired to the vessel s battery supply in the most direct manner possible to minimize interference from other electronic devices The cable used should be of sufficient gauge to handle the power requirements of the Actisense DST 2 refer to the Specifications section Cable grommets The Actisense DST 2 is provided with ABS sealing grommets It is recommended that the box is positioned with the double grommets pointing downwards so that two cables may exit downwards from the case This will prevent any moisture from entering the case as it will drain downwards and not into the case The module case lid is IP66 certified and has an integral gasket If additional protection from water is required add a small amount of silicon sicaflex sealant to the lid s gasket before the lid is screwed to the base Note 1 Wire colours are for guidance only Page 9 Using the A
3. Actisense Important Notices The Actisense Depth Speed and Temperature module DST 2 is intended for use in a marine environment primarily for below deck use If the unit is to be used in a more severe environment such use may be considered misuse under the seller s warranty The Actisense DST 2 has been certified to comply with the European directive for Electro Magnetic Compatibility EN60945 and is appropriately CE marked Operation of the unit should be in conjunction with appropriate CE approved shielded connectors and cabling used in accordance with the CE directive EN60945 Any EMC related issues should be reported to Active Research immediately to allow the company to rectify or resolve EMC related problems in accordance with its obligations under EN60945 If the unit is connected such that compliance failure occurs beyond the company s control the company shall not be held responsible for compliance failure until suitable EMC guidelines for connection are seen to have been taken Warning Depth sounders are not designed to perform as navigational instruments nor as devices to avoid grounding a vessel Any such use of the Actisense depth output is at the vessel owner s own risk and no responsibility will be accepted for any resulting damage or personal injury Always use caution when operating in shallow areas and maintain a very slow speed Be aware that the depth may change more quickly than your ab
4. RS232 converter cable Page 5 Actisense Connecting devices together The basics NMEA data is transmitted from an information source such as GPS depth sounder gyro compass etc These data sending devices are called Talkers Equipment receiving this information such as a chart plotter radar or NMEA display is called a Listener Unfortunately only one Talker can be connected on to a single NMEA 0183 system at any one time Two or more Talkers are simply not possible because they are not synchronised to each other and will attempt to talk at the same time over each other resulting in corruption of the NMEA data and potentially in disaster if valuable data such as navigation information is lost or corrupted so that it is incorrect and or misleading Actisense produces a full range of products to solve all NMEA interfacing requirements Please visit the Actisense website for full details on these and other Actisense interfacing Depth sounding and Sonar products The NMEA signals The NMEA 0183 system v2 0 and later uses a differential signalling scheme whereby two wires are used to transmit the NMEA data These connections will be labelled as either NMEA A and B or NMEA and respectively depending on the instrument and manufacturer When connecting between different manufacturers there can be some confusion but it is simple and easy to remember NMEA A
5. SHIELD CANH T TDUCER GROUND O O ety T GREEN NORMAL IDLE IE Or SEE MANUAL 1 STATUS ACTIVE RESEARCH LTD 2006 www ac tisense com Figure 1 All external connections The DST module DST 2 has screw terminal Phoenix type external connections for 1 Depth transducer input outputs Note The three wire connection type is flexible enough to interface to most standard piezoelectric crystal depth transducers Speed transducer input output The standard three wire connection type should easily interface to most standard hall effect paddle wheel speed transducers Temperature transducer inputs The standard two wire connection type should easily interface to most standard thermistor type temperature transducers An NMEA 0183 data output The NMEA 0183 output comprises of two connections A B and conforms in full to the NMEA 0183 standard for differential communications Battery supply input 2006 Active Research Limited 1 To complete the NMEA 0183 standard all device interconnection NMEA cables used should meet the two conductor shielded twisted pair configuration specification The shield connection of these wires should be connected at the instrument end only to prevent ground loops Refer to the Specifications section for the full details on input output specifications If a laptop PC that is to be used with the DST 2 module does not have an RS 232
6. Achsense Active DST Module Digital signal processing for Depth Speed and Temperature transducers DST 2 C User Manual Issue 1 30 Breathes new digital life into old and new analogue transducers Connects to depth sounder transducers to produce NMEA 0183 depth sentences DBT and DPT Connects to log hall effect sensors to produce NMEA 0183 speed and distance travelled sentences VHW and VLW Connects to 10kO 25 C temperature sensors to produce NMEA 0183 temperature sentences MTW Active DST Module DST 2 C Contents Important Notices Notices Foreword Introduction General features Depth transducer interface Speed transducer interface Temperature transducer interface Technical features Software updates Connecting devices together The basics The NMEA signals The different NMEA standards Connections Connecting to NMEA devices Depth transducer input outputs Speed Log transducer input outputs Temperature transducer inputs Other Connections NMEA 0183 Output RS232 PC compatible Output Connecting to the battery supply Cable grommets oooo 0 0 0 O oooO N oooO 0 I 0 0 A A AR A Using the ActiPatch upgrade utility 1 Main Window 1 Availability 1 Connecting for re programming 1 Troubleshooting guide 11 Specifications 12 Compatible transducer list 13 Order part numbers 16 Company Information 16 2006 Active Research Limited Page 3
7. P Plastic B Bronze SS Stainless Steel 2006 Active Research Limited Page 13 Actisense Compatible transducer list continued For use with Actisense DST 2 C 235 f A D800 amp DT800 through hull retractable Armar with P17 B17 or B122 skin fitting pal gone models m DST800 through hull retractable Arnar with P17 or B17 skin fitting All 230k model m P52 8 P66 transom mount multisensor amp Armar 1 P79 adjustable in hull depth Seb Airmar 1 P19 8 B22 through hull low profile amp 235kHz D P39 transom mount multisensor P23 transom mount depth temp Airmar 1 P319 through hull low profile amp 235kHz C P32 transom mount multisensor Airmar 1 B39 B45 amp B46 through hull stemmed All 235kHz models Airmar 1 B744V amp B744VL through hull multisensor All 235kHz models Airmar 1 SS44V B66V 8 B66VL multisensor All 235kHz models 1 Airmar 95505 8 SS555 through hull stemmed All 235kHz models Table 3 continued Transducer compatibility list Note 1 Airmar skin fitting types P Plastic B Bronze SS Stainless Steel 2006 Active Research Limited Page 14 Active DST Module DST 2 C Notes 2006 Active Research Limited Page 15 Actisense Order part numbers Actisense 150 kHz DST module DST 2 C 150 Actisense 200 kHz DST module DST 2 C 200 Actisense 235 kHz DST module DST 2 C 235 Company Information Active Research Limited TM 5 We
8. ance at 25 Centigrade as used in all Airmar technology transducers Note 1 Wire colours are for guidance only 2 These connections should be carefully connected to each transducer according to the instructions of the transducer manufacturer s Page 8 Active DST Module DST 2 C Other Connections PC or Laptop RS232 NMEA Listener A NMEA Listener B Battery PSU s TEMP TEMP GND 2 006 O 020306 LOG PWR a Mix GROUND E LOG 9 AD PULSE c DEPTH TDUCER e TDUCER lt SHIELD ae Mes E GROUND O k GREEN NORMAL IDLE OTHER SEE MANUAL STATUS Figure 3 NMEA 0183 and Battery connections NMEA 0183 Output The NMEA 0183 buffered output is capable of driving up to 4 NMEA 0183 fully compliant listening devices NMEA Listener device s A and B These devices conform in full to the NMEA 0183 standard and their connection ID s match that of the DST module RS232 PC compatible Output The RS232 PC output can be used to connect to a PC s communication port using a cable conforming to the following specification 1 A D type female socket connector for the PC end of the cable 2 A minimum of 3 cores are required in a shielded cable Higher quality cable will make longer cable lengths possible Most typical cables have two twisted pairs
9. assified as totally protected against dust and protection against low pressure jets of water from all directions The IP66 rating of the case is only limited by the sealing gasket strip which can be enhanced by applying a suitable non acid based marine sealant to the gasket after wiring and testing This will allow use of the unit in areas where salt spray could enter accidental immersion may occur or in environments where maximum long term reliability is paramount Robust ABS grommets are certified to IP68 classified as immersible for long periods without water ingress Note that to achieve this level of water integrity all grommets must be occupied by round section cables Large range of possible cable diameters of between 4 5 mm and 10 mm single or multi pair wire types can be easily accepted Software updates The DST 2 s built in firmware is held in flash memory allowing quick and easy upgrades using a simple Microsoft Windows 95 98 ME NT 2000 XP user interface program ActiPatch running on a connected PC It is our policy to provide these updates free on our website www actisense com so that your DST module can become more sophisticated with time and should there be any bugs reported in the software they can be promptly fixed without the unit coming out of commission This upgrade can be performed with the unit completely in situ via a PC connected to the NMEA 0183 port with the Actisense RS485 to
10. ctiPatch upgrade utility The Actisense DST 2 hardware can be easily and quickly updated using the Actisense ActiPatch The main window has a simple look as the flash update process has been completely automated for a trouble free operation Main Window Actisense ActiPatch update utility E File Comms Help Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Found PIC Hardware s Bootloader Program 29996 Patch ID v1 080 09 05 05 on going Actisense DST 2 4 Main ID v1 080 09 05 05 on going Actisense DST 2 A Serial ID 21 07 04 12 00 00 ARLMODULE DST200 Figure 4 ActiPatch upgrade utility main window Availability The current Actisense DST 2 software program is a very mature product that has evolved over the past 8 vears and as such we believe it has been tested more rigorously than any other depth sounder device currently available Therefore the upgrade feature has not vet become active but everything is in place should it ever be reguired Please monitor our Actisense website for possible updates which will be posted when required If you would like to join our Actiscope
11. e Around the designed frequency kHz Speed Log Speed measurement Sensor dependant Temperature Temperature measurement using 10kO 25 C thermistor all Airmar models o o Table 2 DST 2 specifications All specifications are taken with reference to an ambient temperature T of 25 C Note 1 The maximum quoted currents are for very short periods less than 0 5 milliseconds only 2 NMEA output is RS 485 compatible 3 NMEA 0183 inputs and outputs on the DST 2 are fixed to 4800 baud Custom Baud rates and custom data rates are available if required for specialised installations 2006 Active Research Limited Page 12 Active DST Module DST 2 C Compatible transducer list This compatibility list is by no means exhaustive more transducer types and manufacturers are added every month after their compatibility has been proven Airmar Technology are always expanding and improving their transducer range Any of the 200kHz model types will work well with the Actisense DST 2 C 200 module and likewise any of the 235kHz model types will work well with the Actisense DST 2 C 235 module Airmar do not currently make any 150kHz transducers The 150kHz DST 2 model has been successfully tested with the EchoPilot Marine and NASA Marine transducers Seafarer transducers are essentially the same as the NASA model so should be identical in performance though this is yet to be prov
12. en conclusively Actisense would like personal feedback of any company using the DST 2 module with a different manufacturer and or model type of transducer not included in this list This feedback will help greatly to expand this list ifacturer Ceramic type For use with Actisense DST 2 C 150 Echopilot Marine Standard in hull stemmed with oil bath mounting 150 kHz 30mm circular element NASA Marine 150 kHz 30mm circular element All 200kHz models All 200kHz models Standard in hull stemmed with oil bath mounting For use with Actisense DST 2 C 200 D800 amp DT800 through hull retractable Airmar 1 with P17 B17 or B122 skin fitting DST800 through hull retractable with P17 or B17 skin fitting p P52 amp P66 transom mount multisensor amp Am P79 adjustable in hull depth 2 Airmar 1 P19 8 B22 through hull low profile amp 200kHz U P39 transom mount multisensor P23 transom mount depth temp P319 through hull low profile amp P32 transom mount multisensor Airmar 1 B39 B45 amp B46 through hull stemmed All 200kHz models B744V amp B744VL through hull multisensor All 200kHz models SS44V B66V 8 B66VL multisensor All 200kHz models Airmar 1 Airmar 1 200kHz A Airmar 959505 8 SS555 through hull stemmed All 200kHz models Skipper ETN200FS 8 ETN200F in hull depth All 200kHz models Table 3 Transducer compatibility list Note 1 Airmar skin fitting types
13. ew analogue standard passive no electronics transducers By adding an advanced digital signal processing DST module to standard analogue transducers they can interface directly with any instrument with an NMEA 0183 digital data input The NMEA 0183 marine standard is a purely digital data transmission scheme using binary format 1 s and 0 s to communicate a digital representation of the required information depth speed etc to a connected instrument A depth sounder transducer is a sensor that must be interfaced to a depth sounder circuit capable of both producing the high voltages to drive the depth transducer yet have very sensitive circuitry to receive the faint echoes of the sound reflected from the sea bed Such a depth sounder circuit also needs a powerful software algorithm to track the sea bed and reject false signals that occur throughout the ocean For example an unsophisticated depth sounder device can lock on to a false sea bed due to reflections from nearby targets other depth sounder devices working on the same frequency double depths and even algae formations Actisense has designed and improved their current depth sounder circuitry and software over a development period spanning 14 years The algorithms have now been proven in tens of thousands of products throughout the world that Actisense has either manufactured itself or has played an important design consultancy role in To that Actisen
14. ility to react and avoid grounding the vessel Notices When using this document keep the following in mind The products described in this manual and the specifications thereof may be changed without prior notice To obtain up to date information and or specifications contact Active Research Limited or visit the Actisense website www actisense com Active Research Limited will not be liable for infringement of copyright industrial property right or other rights of a third party caused by the use of information or drawings described in this manual All rights are reserved The contents of this manual may not be transferred or copied without the expressed written permission of Active Research Limited Active Research Limited will not be held responsible for any damage to the user that may result from accidents or any other reasons during operation of the user s unit according to this document 2006 Active Research Limited Foreword Actisense recognises that instructions are often skipped so we have aimed to write this document in an informative yet direct manner that will aid the user We have tried to cover all the points a typical user may need to know Please read all sections before installing and using the Actisense DST module product and any related software programs Introduction The Actisense Depth Speed and Temperature module DST 2 was developed to breathe new digital life into old and n
15. mance obtained may not be as good as that from a transducer with separate shield and ground connections Speed Log transducer input outputs Log transducers generally have three connections A pulse connection marked LOG PULSE on the DST PCB supplies the speed pulses relative to speed A ground connection marked LOG GROUND used as a return for the pulse signal and power supply A power supply connection marked LOG PWR supplies the speed transducer with its power The installer must ensure that this power supply is only connected to the log transducer Damage may occur if this supply output is incorrectly connected as it is connected to the sensitive internal DST circuitry 2006 Active Research Limited Temperature transducer inputs Thermistor type transducers have two connections A resistance input connection marked TEMP on the DST 2 PCB A second resistance connection marked TEMP GND is connected to the other side of the thermistor transducer The polarity of these two signals is not important Airmar Triducer type sensors share a common ground connection for the speed log and temperature sensors If the required transducer does not have a separate ground for log and temperature simply connect the single ground to the temperature ground marked TEMP GND on the DST 2 PCB Temperature transducers suitable for connection to the DST 2 are of the thermistor sensor type with a 10kO imped
16. newsletter list you will be kept up to date on the DST 2 and all other Actisense products via a simple e mail This part of the document will contain full details of the PC based system for re programming when it becomes available 2006 Active Research Limited Connecting for re programming The DST 2 hardware should be connected to the PC serial communications port via an Actisense bi directional RS485 to RS232 adapter cable and a battery supply Please refer to the NMEA 0183 Output section for full connection details If an Actisense NMEA Data Combiner Multiplexer is being used between the PC and the DST it will have to be bypassed to allow bi directional communication between the PC and the DST module Page 10 Active DST Module DST 2 C Troubleshooting guide This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults Therefore the cables between the Actisense DST 2 hardware and any other devices should be checked as a matter of course before continuing with this guide T Error condition Required user response Ensure that correct polarity of the NMEA connections have been observed NMEA connections are polarity sensitive No data seen on and A connections should be wired to the DST s A NMEA instrument display and B connections should be wired to the DST s B No damage should be caused if the polarity is re
17. re value is determined and output as NMEA 0183 temperature sentence MTW Technical features High speed microcontroller capable of 10 million instructions per second More than enough power to perform all the processing required to produce the accurate and very fast tracking depth output of the system in addition to the speed distance and temperature calculations Flash ROM technology that supports automatic programming for quick and easy updates 10 000 erase cycles and a 10 year Data Retention provides carefree user configuration Sounding transducer circuitry capable of interfacing to a wide selection of transducers including Airmar www airmar com Refer to the Compatible transducer list section for further details NMEA 0183 full differential output driver This can drive up to 4 fully compliant NMEA 0183 device loads with a 10mA maximum drive capability The full differential output ensures better quality communications and lower noise emissions on unshielded twisted pair cabling This connection also allows the unit to be updated via the free flash upgrade software available on the Actisense website if the DST 2 software requires an update Wide battery input voltage range to offer maximum compatibility the NMEA 0183 DST 2 can operate from a battery supply anywhere between 10 and 28 volts Low Power Consumption typically 65mA at 12 volts 2006 Active Research Limited Tough ABS case is certified to IP66 cl
18. rrents being drawn by the driver instrument resulting in potential overheating and damage to the driver circuits To connect a new type differential device to an old type single ended system connect the NMEA A output from the differential driver to the single ended NMEA Rx or In input of the device Leave the NMEA B output floating Connect the ground line of the differential output device to the ground of the single ended device This provides the required data signal return current path To connect an old type single ended device to a new type differential device connect the NMEA Tx or Out output from the single ended driver to the differential NMEA A input of the device Connect the ground line of the single ended output device to the NMEA B input of the differential device This provides the data signal return current path If the NMEA B input is left floating then data corruption errors may occur Please refer to the Other Connections section for example of these connection methods Page 6 Active DST Module DST 2 C Connections a a S GROUND E TEMP N TEMP co 0 sz LE gt 3 O a S s O TX Li LOG EN M Om NMEA A PWR re J NMEA LOG m B M GROUND E US A un LOG 9 em S 78 M itse h C GROUND Ti DEPTH a C IN TDUCER S m TDUCER a CANL Ti
19. se has added speed and temperature transducer interfaces to the system This creates a feature rich product that benefits the prospective user The resulting module can measure the four quantities of depth speed log distance and temperature in one device and so save the cost of the extra electronic devices The NMEA 0183 port requirements of the receiving instrument are also reduced from three to just one Full information on the complete Actisense product range can be found on the Actisense website Page 4 Active DST Module DST 2 C General features Depth transducer interface Connects to a standard piezoelectric depth transducer crystal element using a three wire interface Generates the high transmit voltages and receives the weak echo returns from the sea bed Using an advanced sea bed tracking algorithm the depth value is determined and output as NMEA 0183 depth sentences DBT and DPT Speed transducer interface Connects to a standard paddle wheel hall effect speed transducer using a three wire interface Generates the required power supply and receives the pulse signal from the paddle wheel Using statistical analysis the speed and distance values are determined and output as NMEA 0183 speed and distance travelled sentences VHW and VLW Temperature transducer interface Connects to a standard thermistor transducer using a two wire interface Using a very high resolution algorithm the temperatu
20. serial port available the Actisense USB to RS 232 adapter cable has been tried and tested to provide a compatible communications port when used in conjunction with the Actisense NMEA Opto isolator adapter cable Please visit the Actisense website for full details on these and other Actisense products Page 7 Actisense Connecting to NMEA devices Temperature transducer Speed transducer GROUND Cm Z RX lt Om mh TX O mmm gt NMEA A o ea o B Z POWER 1 u 18 28v Nm AU GROUND i C IN N r m CANL CANH Depth TDUCER transducer Z GREEN NORMAL IDLE OTHER SEE MANUAL O STATUS Figure 2 Transducer connections Depth transducer input outputs Depth transducers have two or three connections A Live connection marked DEPTH TDUCER on the PCB usually a coloured wire on twisted pair cable Airmar or the centre conductor on a coaxial cable A Ground connection marked DEPTH GROUND often the black core of a twisted pair cable Airmar Coaxial cables have a common shield ground A Shield connection which is the shield of a two wire cable or the outer sheath on a coaxial cable Two connection transducers only provide the Live and ground connections Whilst the DST 2 will work with these types of depth transducers the perfor
21. ssex Trade Centre coe Actisense Poole Dorset UK BH12 3PF Telephone 01202 746682 International 44 1202 746682 Fax 01202 746683 International 44 1202 746683 Actisense on the Web For advice support and product details E mail support actisense com Website www actisense com Active Research on the Web For specialist consultancy and customisation E mail support activer com Website www activer com 2006 Active Research Limited Page 16
22. versed but no NMEA data will be seen on the receiving instrument Ensure that the PC software is selecting the correct PC Comms port number As a diagnostic you can use the standard Windows HyperTerminal utility to receive NMEA data By setting the input comms port to the one the NMEA DST 2 is connected to the baud rate to that required 4800 standard no parity 1 stop bit 8 data bits and no flow control the received NMEA text data from the DST 2 will be shown on the PC screen No data seen on PC display Table 1 Troubleshooting guide 2006 Active Research Limited Page 11 Actisense Specifications r mln o Supply voltage Supply voltage 12v Supply current no load see note 1 Supply voltage 24v Supply voltage 12v Supply current loaded see note 1 Supply voltage 24v NMEA Output voltage between and ground Logical 1 stop bit see note 2 At maximum load drive voltage Output current see note 2 reduces fo 2y Output short circuit current Baud rate fixed see note 3 kbit sec Data output rate secs Depth Sounder Depth range using narrow beam sensor 0 10 Knots ideal conditions d metres like the Airmar P66 10 40 Knots ideal conditions metres Depth range using wide beam sensor like 0 10 Knots ideal conditions metres the Airmar DT800 10 40 Knots ideal conditions metres Depth sounding frequency toleranc
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