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Detailed information about the 

Weather station 

can be found in the manual “

DREAM with 

Weather station

”. 

 

6.

 

LIGHTNING PROTECTION 

 

 

A lightning will usually penetrate the system through the long cables connected to it; therefore 

all the long cables must be protected against lightning.  

 

In the DREAM 2 there can be several cases where long cables will require lightning protection: 

The  DREAM++2W  -  the  2  wired  line,  can  be  kilometers  long,  the  RS485  communication  line 

between  the  DREAM  and  remote  interfaces  can  sometimes  be  very  long  and  the  DREAM  AC 

may  also  have  long  wires  between  the  AC  I/O  boards  and  the  solenoids.  The  lightning 

protection is accomplished by adding special protection units between the cables coming from 

the field and the device to be protected. The lightning protection circuits contain components 
that  react  very  fast  when  hit  by  a  lightning.  These  components  turn  into  a  short-circuit  that 

leads  the  lightning  energy  into the  ground.  For this to  happen,  each  lightning  protection unit 

must have a very good connection to the ground. In the 2W systems each RTU has a built in 

lightning protection therefore it is very important not to forget the connection to the ground of 

each  RTU.  The  connection  to  the  ground  is  done  by  a  thick  wire  connected  to  a  metal  rod 

inserted deeply into the ground. 

The following pictures show the three types of lightning protection units- one that is used for 

the 2W single cable system, the second that is used for protecting the RS485 communication 

line, and the last one is for protecting the wiring that goes from the I/O AC board to the 16 AC 

solenoids connected to it.   

Weather 
station’s console  

Sensor’s suit 

Power supply 

Lightning 
protection 

Weather 
station 
interface  

RS485/RS232 

External interface 
connection card  

Summary of Contents for DREAM 2

Page 1: ...1 TALGIL COMPUTING CONTROL LTD NAAMAN CENTER HAIFA ACCO ROAD ISRAEL P O BOX 775 KIRYAT MOTZKIN 26119 TEL 972 4 9506050 9506051 FAX 972 4 8775949 February 2016 DREAM 2 INSTALLATION GUIDE ...

Page 2: ...log inputs 28 5 5 Interface pH EC Fertmaster 30 5 6 THD Interface 31 5 7 Weather station Interface 32 6 LIGHTNING PROTECTION 33 6 1 Lightning protection for the 2W single cable system 34 6 2 Lightning protection for RS485 communication line 34 6 3 Lightning protection for 16 AC outputs 34 6 4 The enclosures of the DREAM system 35 7 INSTALLATION STEPS 35 7 1 Mounting the controller 36 7 2 Defining ...

Page 3: ...3 1 The Push Buttons 59 9 3 2 LED indicators 59 9 3 3 The Jumper 59 10 APPENDIXES 60 10 1 Appendix A Decimal to Binary conversion 60 10 2 Appendix B Rules about cables 61 10 2 1 CABLE RESISTANCE TESTING 61 ...

Page 4: ...apacity and above all it now offers internet communication supported by a powerful SERVER Users and technicians can now access the controllers from everywhere anytime Upgrading from DREAM 1 to DREAM 2 is involved with replacement of three boards only the CPU the Mother board and the Power supply board The following schematic diagram describes the principal structure of the DREAM 2 system which apa...

Page 5: ...The CPU communicates with all the I O Interfaces second by second sending them the desired status of outputs and receiving back the status of the inputs The schematic drawing above shows the various kinds of Interfaces recognized by the DREAM 2 system A control system will include an arbitrary combination of these Interfaces some controllers may include several Interfaces of the same type The comm...

Page 6: ... this example there is one Local I O board 16 8 16 outputs and 8 inputs The RF Interface is coordinating between the CPU and the Master receiver transmitter which is in charge of the communication with the radio RTUs in the field To demonstrate the flexibility of the DREAM 2 system we shall bring another example of a controller which is designed for powering by solar energy it does not contain a t...

Page 7: ...ce and check the Charging Fuse The red LED of 24v AC in AC models will start lighting when the Power Switch is turned on If this does not happen the Main Power Fuse has to be checked The green LED of 12v DC will start lighting when the Power Switch is turned on The 12v DC is used for feeding all the electronic boards of the system it may be generated either from the charging source or from the bac...

Page 8: ...ED of the power supply board the red LED on the Mother Board and the three red power LEDs on the CPU Board will start lighting as well The procedure of switching up and shutting down the DREAM 2 controller are explained in details at paragraph 1 2 below 1 1 2 The Mother Board The following drawing shows the main components of the Mother board At the right side there are two green sockets from whic...

Page 9: ...rd the external socket is for the cable that goes to the Ethernet source on site 1 1 3 The CPU board The CPU board can be found underneath the front panel at the back of the LCD display Let s get familiar with some of the components on the CPU board The Cellular modem and the Ethernet card are two of the three options for connection to the internet The third is a USB Netstick that can be plugged i...

Page 10: ...roller is stored under this ID number therefore if a CPU board need to be replaced The Server must by notified through the ADMINISTRATION software about the new CPU that replaces the old one 2 SWITCHING UP AND SHUTTING DOWN 2 1 Switching Up Switching up the DREAM 2 from a switched off state is done in 2 steps 1 Turning ON the Power Switch 2 Pushing the Start button When the DREAM 2 application sta...

Page 11: ...shut down The software Shutdown button is located at the Function Bar of the System Manager screens which can be reached from any of the DREAM 2 application screens by pushing simultaneously the PgDn and PgUp buttons Exiting the System Manager screens is done in the same manner Pushing the F3 Shutdown button is the only safe way for shutting down the DREAM 2 controller Shutting down takes time it ...

Page 12: ...dditionally the SERVICE contains a large DATA BASE that stores all the information about all the controllers and the ADMINISTRATION software that decides about who is permitted to access which controller When a controller tries to login the SERVER will ask its ID number and its full Image contents If the Image structure is correct the controller will be permitted to login otherwise it will be reje...

Page 13: ...rsor to the left side of the screen and use the down arrow to place the cursor on the Network subject This subject deals with defining the IP address and the Gate Way address at which the server can locate the controller Step 4 Use the right arrow again to move the cursor to the right side of the screen the cursor will rest on IP address Usually selecting the Auto mode will do the job However in s...

Page 14: ...t the screen will change into an editor screen like the one below in which the characters need to be selected one by one When the correct string is complete use F3 Apply to exit the editor screen Step 7 When the Dealer s users name is not defined the controller will be registered as belonging to Talgil therefore in order to make it register as belonging to the Dealer s organization the Dealer shou...

Page 15: ...r the System Manager screens by pressing the PgDn and PgUp keys simultaneously Step 2 While the cursor is placed on the General subject use the right arrow to move the cursor to the right side of the screen and then use the down arrow to move the cursor to the Connection row Hit the Enter key to open the options selection window select Modem and hit the Enter key for confirmation Step 3 Use the le...

Page 16: ...art We shall use this option whenever we are sure that all the parameters are properly defined and still the modem fails to connect Step 7 Continue with setting the Service parameters as explained starting from Step 5 of the previous paragraph 3 1 4 THE SYSTEM MANAGEMENT SCREENS The System Management screens were already mentioned above however due to their importance we shall devote a special cha...

Page 17: ... is unique to each CPU board and cannot be changed It is important to point out that all the information related with the controller and stored in the Data Base is associated with its ID number so if for some reason the CPU has to be replaced the Service must be notified about the replacement by activating the REPLACE command The Discharge level depends on the type of backup battery used by the sy...

Page 18: ... then the person in charge of the local network should supply the following information The IP address This is the address given for the DREAM 2 within the router or in other words this is the address at which the controller can be found on the Internet The GW GateWay address is the IP address of the router The DNS it is the address of the DNS Domain Name System server to be used for resolving DNS...

Page 19: ...port to be used by the controllers for accessing the server 55300 The Dealers username when the controller is trying to login the server checks the contents of this field and if it contains a username of a legal Dealer it will register the controller as belonging to this Dealer and he will be able to use it for one of his projects If this field is left undefined the controller will be registered a...

Page 20: ...T the update will be taken from the Server through the Internet This obviously requires the controller to be online Log to USB the log file will be saved on the USB memory stick Update beta the update will be taken from the Server through the internet but instead of the actual version the beta version will be loaded The beta version is the one which is still under development and has not yet been ...

Page 21: ... several operations that can be executed with the configuration When the cursor is placed at the row containing the Date of last configuration pushing F3 Change will reveal the following options Set default configuration If the image of the controller is lost or corrupted it will be rejected by the server In that case a default configuration can be loaded and after the connection to the server is ...

Page 22: ...s several models of modems for which the appropriate drivers are available So first thing is to select the type of modem we intend to use After selecting the type of modem in use the APN should be defined The APN is the Access Point Name used by the specific cellular data communication provider Wrong APN may block the data communication The user name the password and the dialing number are usually...

Page 23: ...ace may control 1 or 2 I O boards of 16 outputs and 8 digital inputs It is meant for reading digital inputs and activating outputs which are close enough to be directly connected to the control unit Let s have a closer look at the local I O interface The jumper by which the interface is adjusted to AC or DC I O boards The address switch by which the interface address is set Three indication LEDs T...

Page 24: ...short blink each second The yellow and green LEDs serve the I O test mode After pushing the test button the interface goes into the I O test mode The yellow LED tells us whether we are testing outputs or inputs During the outputs test yellow LED will be constantly ON and then each output will be opened and closed each opening and closing will be indicated by a blink of the green LED During the inp...

Page 25: ...dealing with the REBRAN board Beware of the polarity The RS485 communication line has a positive wire marked P2 and a negative wire marked N2 Do not confuse between them A few facts about inputs outputs and connections to the I O boards Digital Inputs same on AC and DC I O boards The digital inputs receive dry contact sensors with no polarity Each input is connected to the I O board by 2 wires tha...

Page 26: ...minal board but will differ in the connection of the command tubes and sometimes will differ in their physical structure Measuring the voltage of an AC output while it has no load connected to it can be misleading it will show 24v AC even when the output is not activated DC Pulse Latching Outputs DC latching outputs are activated by short pulses of energy and they are kept in their last position b...

Page 27: ...mmand The voltage at the DC output cannot be measured by regular voltmeters because it exists for a very short period 5 2 Interface for single cable 2 wired RTUs When it is required to reach distant I O devices radius of 10 km and it is possible to lay a 2 wired cable in the field we shall use the 2 wired RTU system to reach all the remote I O devices The RTUs are Remote Terminal Units which can r...

Page 28: ...top of a high pole The SLAVES exchange information with the MASTER each in its appropriate timeslot dictated by the RTU s address It is expected that there will be a clear line of sight between the antenna of the RF MASTER and the antennas of the RF SLAVES otherwise some RF RTUs can be turned into REPEATERs for the benefit of their neighbors Similar to the 2 wired RTUs the RF RTUs can read digital...

Page 29: ...ace is installed outside the enclosure of the Dream 2 and both the sensors and the interface are powered externally Jumper JP12 decides the functionality of the board which can serve for other functions as well For reading analog inputs it should be set in left position The address switch should be set according to the address given to the analog inputs interface during the Hardware and connection...

Page 30: ...pecial interface will be used Apart from reading the analog values of the pH and EC electrodes the pH EC interface is capable of handling 6 injectors of fertilizers and a booster pump it is equipped with a display and a key board which enable calibrations parameters setting and monitoring to be done directly at the interface During the injection process it receives from the DREAM 2 controller all ...

Page 31: ... configuration process when defining the hardware in use the THD interface will be defined as an analog interface of the type THD Like any other interface it has an address switch that has to be set according to what has been defined at the configuration process The scale range is automatically adjusted and need not be touched however for obtaining the values in American units JP14 on the THD boar...

Page 32: ...n is transferred by communication through the RS 485 line The Weather station is defined during the configuration process when defining the hardware in use The Weather station interface will be defined as an analog interface of the type DAVIS Like any other interface it has an address switch that has to be set according to the definition made at the configuration process The eleven sensors will be...

Page 33: ...tion circuits contain components that react very fast when hit by a lightning These components turn into a short circuit that leads the lightning energy into the ground For this to happen each lightning protection unit must have a very good connection to the ground In the 2W systems each RTU has a built in lightning protection therefore it is very important not to forget the connection to the grou...

Page 34: ...ing protection for RS485 communication line Ground 6 3 Lightning protection for 16 AC outputs Ground Cable coming from the field Cable going to the 2W interface Cable coming from the field Cable going to the 2W interface Cables coming from the field Cables going to I O AC board ...

Page 35: ...ection in any case There is no protection against a direct hit the energy of the lightning is too high to be absorbed by any protection system 6 4 The enclosures of the DREAM system The DREAM 2 controllers can be ordered in one of the two enclosure formats PLASTIC ENCLOSURE METAL CABINET The metal cabinet is meant for wall mounting it has a bigger size and therefore it may accommodate additional i...

Page 36: ... between the valves and the solenoids the connection will be by command tubes The same is true about connection of solenoids to remote I O DC expansion units and all kinds of RTUs all of them activate DC latching solenoids which cannot be installed away from the commanding unit If the DREAM contains local I O AC outputs obviously all the cables arriving from the solenoids will have to reach the lo...

Page 37: ...he selection is done by the ENTER key Entering into the SYSTEM CONFIGURATION subject without inserting a password enables only to watch the existing configuration In order to get permission for defining a new configuration a password is required The password is 139 it is not a secret password it is only meant to make the user think again before erasing the previous definition and all the accumulat...

Page 38: ...ne L7 is a nursery and L8 irrigates a palm plantation The DREAM 2 control unit will be located at the pump house at source A where electricity is available The accessories that are in close proximity with the DREAM 2 will be wired directly to the local I O terminal boards at the DREAM 2 itself The accessories of lines L1 to L6 and the second water source are connected by use of 17 single cable RTU...

Page 39: ...meter Satllite C1 C2 RTU 3 RTU 4 RTU 5 RTU 6 RTU 7 RTU 8 RTU 9 RTU 10 RTU 11 RTU 12 RTU 14 RTU 15 RTU 16 Dream L1 RTU 1 RTU 2 Nursery RTU 13 Remote I O L7 RTU RADIO 1 RTU RADIO 2 RTU 17 Plantation L8 P S1 S2 Local Fert site of line 5 Contact of level sensor Source water meter Local Fert site of line 6 Main valve of line 2 ...

Page 40: ... any of the other outputs is active 2 A satellite can be activated by a condition becoming true and stay activated as long as the condition is true 3 Conditions can be defined on the statuses of satellites so if we combine this feature with feature number 1 above we can actually get conditions depending on the statuses of any of the outputs that the satellite are attached to Detailed explanation a...

Page 41: ...o which one Does the irrigation line contain a dry contact pressure sensor If yes it should be the normally open type Water meters that not associated with irrigation lines Source A has 2 pumps and source B has 1 pump The irrigation lines will automatically get the default structure as defined here Later on each line can be adjusted as required Source A has no water meter but source B does In our ...

Page 42: ... to do the numeration yourself The selected water source in the Source column will be used as default during definition of irrigation programs Lines 1 to 4 are using central fertilizer site No 1 Line 8 has got a pressure sensors Lines 1 to 4 are using central filter site No 1 Lines 5 and 6 have local fertilizer sites The number of valves of line 1 is 6 The default source of lines 1 4 6 is A and of...

Page 43: ...e top screen of NETWORK DEFINITION from where we can continue to the HARDWARE DEFINITION by using the rightmost red function key or pass again through the NETWORK DEFINITION by using the PAGE DOWN key Central fert site No 1 and the local fert sites of line 5 and line 6 contain 2 injectors each injector is equipped with fert meter and uses no booster pump There is one filter site Central No 1 There...

Page 44: ...complimentary information to be defined Use the PAGE DOWN key to reach the following table In our example there are 2 DC I O interfaces one inside the DREAM and the other inside the remote I O at the nursery There is 1 two wired RTU interface serving the communication with RTUs 1 to 17 There is 1 Radio RTU interface serving the communication with Radio RTUs 1 and 2 Interface DC No1 resides inside ...

Page 45: ... at DREAM RF RTU GENERATION III IV and IV V Physically the setting of the addresses on the interfaces is done by dipswitches on the various interface boards Notice that we are using binary coding for the address setting The binary coding is explained at appendix A below 7 2 3 CONNECTIONS DEFINITION 7 2 3 1 During the following step we define where exactly each of the outputs and each of the inputs...

Page 46: ...er Interface address Valve 1 of line 8 by radio interface 4 RTU 1 output 1 Filter 4 by interface 1 output 8 Valve 6 of line 6 by interface 3 2 wired RTU 16 output 2 Valve 1 of line 7 by interface 2 REMOTE I O output 1 without RTU ...

Page 47: ...be defined individually sensor by sensor but they get defined automatically once the interface of those sensors is defined In the other cases the user needs to define the connection of each analog sensor the same way the digital inputs and outputs connection is defined However when the analog sensors are connected through the single cable 2 wired RTU system the rules of addressing are tricky Detai...

Page 48: ...d PgUp buttons Push the red function key underneath the word Manual the cursor changes its form into a blinking underline _ now by using the horizontal arrows the cursor can be moved to the right and to the left enabling selection of outputs from the list For activating deactivating the selected output we use the same function key F2 which now functions as ON OFF button The activated outputs will ...

Page 49: ...rameters dictate the memory allocation for certain purposes The DEALERS DEFINITIONS can only be executed while there are no irrigation programs running For entering the procedure of setting the parameters the system requires inserting the code 247 Another important thing to do is the setting of the CONSTANTS The list of constants includes parameters without which the configuration process is not c...

Page 50: ... in the ADMINISTRATION software and both the user and the simulated controller need to be assigned to the project The key board of the simulation is used the same way as the key board of the real DREAM controller except for the way the SYSTEM MANAGER screens are reached At the real controller we need to press simultaneously the PgDn and PgUp buttons at the simulation we need to activate special so...

Page 51: ...tching process is involved with connecting disconnecting high power electric sources to high power loads this action may sometimes create sparks and electric interferences therefore it is better to have a good galvanic isolation between the commanding unit and the high power electric devices being switched This is the reason why we are using special PUMP SWITCHING UNITS that contain a solid state ...

Page 52: ...it is too big then the pump switching unit will not switch the power to the pump directly but rather activate a contactor that will switch the pump ON and OFF IMPORTANT 1 In each package of PUMP SWITCHING UNIT a capacitor of 1 µF 400v is supplied this capacitor should be installed in parallel with the load otherwise in some cases the pump will not turn OFF 2 The internal contact of the solid state...

Page 53: ...53 ...

Page 54: ...54 ...

Page 55: ...argeable battery of 3Ah 9 2 The three functions of the REBRAN board The following paragraph describes a special board that can be used in three different ways depending on the setting of the jumpers onboard We call it the REBRAN board the name is derived from the three functions the board can fulfil RE stands for REPEATER BR stands for BRIDGE AN ANALOG INPUTS INTERFACE 9 2 1 RS485 Repeater with op...

Page 56: ...effect of isolation For this purpose the repeater board has the ability to be powered either from the input side or from the output side while the two sides remain galvanically isolated For feeding from the output side the 4 jumpers JP7 JP9 JP10 JP11 should be in right position opposite to what appears in the picture above The dipswitches in this case function as a baud rate selector with the foll...

Page 57: ...n the DREAM and remote interfaces The bridge improves the communication with the remote interfaces connected to it On one side the bridge is plugged into the DREAM S motherboard and on the other side it is connected to the remote interfaces by cable of 2 wires The address setting of the BRIDGE must be done in a careful way It is important to set the address switch of the BRIDGE to an address that ...

Page 58: ...ll be represented by each output pulse Notice that a complete pulse consists of the positive and the negative parts of the pulse EXAMPLE Let s assume that Dip switch 5 OFF TABLE 1 is selected and the Dip switches 1 4 are set to 0100 division by 4 In this case each 4 pulses at the input will cause 1 symmetric pulse to be emitted at the output Notice that a complete pulse consists of both the positi...

Page 59: ...ly remain off but it will blink a short blink when the rate of input pulses is too high in this case a higher division factor should be selected When the Indicator button is pushed and held down the GREEN LED will show the actual status of the input and the RED LED will show the actual status of the output a closed contact will turn the LED ON and open contact will turn it OFF 9 3 3 The Jumper Whe...

Page 60: ... 0 0 0 1 0 0 38 0 1 1 0 0 1 9 1 0 0 1 0 0 39 1 1 1 0 0 1 10 0 1 0 1 0 0 40 0 0 0 1 0 1 11 1 1 0 1 0 0 41 1 0 0 1 0 1 12 0 0 1 1 0 0 42 0 1 0 1 0 1 13 1 0 1 1 0 0 43 1 1 0 1 0 1 14 0 1 1 1 0 0 44 0 0 1 1 0 1 15 1 1 1 1 0 0 45 1 0 1 1 0 1 16 0 0 0 0 1 0 46 0 1 1 1 0 1 17 1 0 0 0 1 0 47 1 1 1 1 0 1 18 0 1 0 0 1 0 48 0 0 0 0 1 1 19 1 1 0 0 1 0 49 1 0 0 0 1 1 20 0 0 1 0 1 0 50 0 1 0 0 1 1 21 1 0 1 0 1 ...

Page 61: ... cable under test including from any RTU in the middle and make sure the wires are not touching each other Check the resistance between the wires Use the highest range available on the ohmmeter tens or hundreds of KΩ The resistance should be infinite or at least not lower than 1 MΩ Check the resistance between each wire to the ground Use the highest range available on the ohmmeter tens or hundreds...

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