IVC24-04 User`s Manual Version 1.0
Contents
1. Measured Current vs Piecewise Linear Fit 1 4 1 2 1 0 8 S DMM Current 5 nvoCurrentMil 5 0 6 o 0 4 0 2 0 0 5000 10000 15000 20000 nvoCurrentRaw 400ns counts The X axis is the raw network variable output nvoCurrentRaw The blue line is the current as measured by a DMM The yellow line is the network variable output nvoCurrentMil The current measurement circuit serves two purposes 1 To detect the over current condition and shut off outputs 2 To monitor increases in current consumption over time The first function helps protect the IVC24 04 and the irrigation network in the event that an output becomes shorted When the current exceeds the limit for 6 AC cycles in a row on one or a combination of outputs all outputs will be turned off The network variable outputs nvoOverCurrent1 through nvoOverCurrent4 will indicate the last output activated before the over current condition was detected When designing your system remember to take into account the number of outputs that will be activated simultaneously and the current consumption of those outputs The total current consumption of all active outputs should not exceed 1 2amps for continuous operation The second function allows tracking trends in current consumption over time in valve solenoids Sometimes the current consumption of a solenoid will increase before failing Monitoring the current consumption of a solenoid while it is activated2. 4 0 5 ohm Neutral When the output is disconnected a square wave due to clamp diodes in the digital input of the microcontroller is present on the digital logic side of the disconnect detect sense resistor The microcontroller watches for this toggling input If the input toggles for more than 6 cycles in a row the output will be marked as disconnected At 50Hz therefore it will take 6 AC line cycles or 6 20ms 120ms to detect a disconnected output When driving a DC load by adding a single diode for example connect the diode as shown below for proper operation of the disconnected output detector 24VAC Line Digital Out Disconnect Out PN Detect ae ge z LOAD Common lsense 0 5 ohm Neutral Connecting the diode with this orientation drives the load using the positive half cycle This allows the load to sink the leakage current on the positive half cycle which allows the disconnect detect circuit to sense the output is connected Current Measurement Current measurement is accomplished by comparing the voltage across a sense resistor to a reference voltage and then measuring the time the sense resistor voltage is above the reference voltage Bibaja Landscape Automation LLC 22 2004 The circuit below shows the connection of the current measurement comparator to create the Imeasure signal 24VAC Line Digi
3. 95 Transformer lugs Note wire lead transformers are recommended only for those comfortable dealing with electrical wiring Wall plug transformers are much more convenient and plug into any available AC outlet Choosing the Installation Location and Wiring Topology The IVC24 04 enclosure is NEMA4 IP65 rated so it may be located outdoors or indoors The choice of installation location will be determined by the choice of wiring topology For retrofit applications of simple 4 zone irrigation controllers choosing the location is simple Put the IVC24 04 in the same location where the old controller was and use the existing wiring In some cases the AC transformer from your old controller may work to supply the IVC24 04 power as well You will also need to bridge the power line communication across the 24V AC transformer using the PLC240 device from Bibaja Without the PLC240 the USB12 01 will not be able to communicate with the IVC24 04 Bibaja Landscape Automation LLC 3 2004 For larger retrofit applications involving multiple zones all star wired back to a central location the existing wiring may be reused to bring 24V AC power to the valve locations and the IVC24 04 units placed outdoors with the valves Here is an example of a 16 zone system before retrofit Original 16 Zone Controller 12 3 4 5 6 7 8 91011 1213 14 15 16 C COMMON WIRE COMMON WIRE For the retr
4. from the label from the side of the device If you used the IVC24 04 Installation Worksheet form the NID should be recorded on the third line 24 04 NID Enter the 12 letters and numbers between the two asterisks Here is an example dialog from LonMaker for entering the IVC24 04 NID manually New Device Wizard x Device Identification Method Device Namels 1 C24 04 Device Service Pin Manual Neuron ID 050001 020300 lt Cancel Once the device commissioning and installation process has been completed you are ready to proceed to making network variable connections and updating the device configuration properties You may also look for unconfigured devices The IVC24 04 device ship uncofigured from the factory and may be installed this way if your installation tool supports it Bibaja Landscape Automation LLC I3 2004 Network Variable Connections One the device has been commissioned the network variables may be bound to controllers such as the i Lon100 The available network variable inputs nvi s network configuration inputs nci s and network variable outputs nvo s for controlling and monitoring the device are IVC24 04 nviOut1 S nviOut2 nviOut3 8 nviOut4 nvoState1 nvoState2 nvoState3 nvoState4 nvoDisconnecti nvoDisconnect2 nvoDisconnect3 nvoDisconnect4 nvoOverCurrent1 nvoOverCurrent2 nvoOv
5. system consists of the master valve and the zone valves The controller for the system needs to know where the master valve and zone valves are attached to be able to run the system properly If you are using software such as LonMaker for Windows you will have to bind the controller you use to guarantee the master valve is activated first then the zone valves are activated in sequence and then the master valve is turned off Heartbeats or multiple updates must be configured to keep the master valve open for the duration of the irrigation cycle From the worksheets find which IVC24 04 outputs are connected to what devices in the network Bind the master valve to the control output that will activate for the duration of each irrigation cycle Then bind each zone valve to an output on your controller Define the Schedules Once the connections are established schedules must be defined to open the valves regularly to meet the landscape s water requirements Make certain you know how many minutes each zone requires The irrigation contractor should be able to tell you how long to run each zone in the system The sequence to run the system may look like the following Bibaja Landscape Automation LLC 33 2004 Start at 3 00am Tuesday and Friday Activate Master Valve Activate Zone 1 20 minutes Activate Zone 2 15 minutes Activate Zone 5 20 minutes Activate Zone 6 30 minutes Deactivate Master Valve Finish at 4 25am Other sequences o
6. useful for remote control of automatic irrigation valves relays contactors and many other standard 24V AC devices The versatile triac driven outputs of the IVC24 04 are well suited for many different applications Embedded power line communications and a sealed IP65 NEMAA enclosure provide easy system expansion No need to dig a trench and lay new wires out into the field Attach wires to the nearest 24V AC power and add new valves The IVC24 04 may be placed into the valve box with the valves Integrated output disconnect detection circuitry provides a way to detect when the outputs have been disconnected This feature may be used to sense contact closures as well making the output of the IVC24 04 function as an input This document will present important details regarding how to install the IVC24 04 device and how to select the proper power supply and wiring Pay close attention to the specified ratings for the IVC24 04 device Do not exceed the maximum ratings to guarantee years of reliable operation Detailed specifications are given for the operation of some of the internal circuitry within the IVC24 04 These circuit details will show you how our device operates and possibly inspire other ideas for applications using the IVC24 04 device We will also attempt to cover a few application ideas for the IVC24 04 Check our website periodically for new application ideas and updates for the IVC24 04 product Document Organization This d
7. value 100 0 when output is disconnected When contact is open nvoDisconnect2 SNVT switch depends on connection Feedback to monitor output connection for OUT 2 May also be used as a contact closure input sensor Set to state off value 0 0 when output is connected When contact is closed Set to state on value Bibaja Landscape Automation LLC 15 2004 100 0 when output is disconnected When contact 1s open nvoDisconnect3 SNVT switch depends on connection Feedback to monitor output connection for OUT 3 May also be used as a contact closure input sensor Set to state off value 0 0 when output is connected When contact is closed Set to state on value 100 0 when output is disconnected When contact is open nvoDisconnect4 SNVT_switch depends on connection Feedback to monitor output connection for OUT 4 May also be used as a contact closure input sensor Set to state off value 0 0 when output is connected When contact is closed Set to state on value 100 0 when output is disconnected When contact 1s open nvoOverCurrent1 SNVT_switch state off value 0 0 Set to state on value 100 0 when OUT 1 was the last output activated before an over current event was detected State be cleared by correcting the problem and reactivating the output or by resetting the d
8. 0 feet e The type of wire 14AWG direct burial The irrigation contractor may now proceed with the installation Make certain all outdoor connections are water resistant Bibaja Landscape Automation LLC 32 2004 Make certain to use the worksheet to record the NIDs of each device and the attached zone This will make software setup much simpler System Setup and Operation The software to run the system must now be configured There are three basic tasks to be completed 1 Install and configure the IVC24 04 devices 2 Define the irrigation system and zones for the software 3 Define the irrigation schedules Install and Configure IVC24 04 Devices Depending on your software you should have a way to easily add new devices Refer to your software manual on how to install a new device You will need the NID from the worksheets to communicate with and install the IVC24 04 devices Once the IVC24 04 devices are installed either use the IVC24 04 device plug in or a device browser to configure the configuration property nciMaxRcvTime for your system This variable sets the automatic shutoff timers If the computer loses communication with the IVC24 04 this shutoff timer will turn off the outputs For simplicity simply choose the maximum run time for the attached zones If you have a drip zone that needs to run for 30 minutes then set the value for nciMaxRcvTime to 1800 Define the Irrigation System and Zones The example irrigation
9. a lawn amp garden irrigation system with 10 zones and 1 master valve This system will require 3 IVC24 04 units Two valves will be active at the same time The master valve and one zone valve Typical irrigation valves consume less than 300ma steady state current with a maximum inrush current of 700ma Valves are actuated sequentially Therefore only one valve will consume the inrush current while all other active valves will consume the steady state current Each IVC24 04 device consumes a Bibaja Landscape Automation LLC 2 02004 maximum of 100ma The rating of the transformer will be the sum of these currents calculated as follows 1 master valve steady state 300ma 1 zone valve inrush 700ma 3 1VC24 04 100ma 300ma Total 1300ma required current VA Requirement V A 24V 1 3A 31 2VA minimum 24V AC transformers of various VA ratings are available online Here is a short list of places online where you can order wall plug and wire lead transformers sorted by increasing VA ratings Vendor Website Part VA Cost Features Estimated www digikoy com MT7116 ND 19 9 Sia EPI saen terminals 10102 24 7 95 Wall plug 3 1mm jack www jameco com 176356 30 10 49 Wall plug 2 1mm jack www smarthome com 3061 40 14 99 Wall plug screw terminals www mouser com P 8663 96 24 24 Transformer wire leads www mouser com P 8665 192 37 00 0 wire www jameco com 221410 288 41
10. cycles in a row The IVC24 04 is capable of providing brief inrush currents of up to about 10amps to start devices like contactors These outputs latch state and may be reset in any of the following ways e Reset the IVC24 04 device clears all status e Correct the problem and reactivate the output e Cause an over current event on another output If the combined current of all active outputs is greater than 1 2amps consider moving some active outputs to another IVC24 04 If the current drawn from a single output exceeds 1 2amps then it is recommend that an intermediate relay be used to drive the external load Relatively low cost relays are available from Digikey www digikey com with 24V AC coils that consume around 130ma of current nvoCurrentMil and nvoCurrentRaw Most users interested in datalogging the current will use network variable output nvoCurrentMil This output reflects the combined current consumption of all outputs in milliamps from 340 0ma up through 3276 7ma The accuracy of the current measurement is 6 Current below 340 0ma will not register and will be reported as 0 0ma This sensor should be monitored to detect increasing current consumption over time Increasing current consumption may be an indicator that a valve solenoid or other attached device is failing When the current consumption is non zero and greater than 340ma this output will be updated at most once per second With a large network of these devic
11. d system these outputs may be monitored to determine if the output properly activated These network variable outputs do not reflect the state of the corresponding network input nviOut nviOut4 Instead they reflect the actual output status After activating an output using one of nviOutl nviOut4 you must wait at least 10 AC Cycles to guarantee the corresponding nvoStatel nvoState4 feedback has set The maximum wait time is 200ms These status outputs may be bound to a datalogger or to lights on a status panel to provide system status nvoDisconnect1 nvoDisconnect4 These four network variable outputs indicate whether an output has been disconnected If the output is disconnected the network variable output will assume the state and value 100 Connected outputs will assume the state off and 0 These nvo s may be used to sense contact closures if the outputs are used as inputs When the contact attached to an output is closed the corresponding nvo will assume the off state Bibaja Landscape Automation LLC 18 2004 When the corresponding network variable input nviOut1 4 is set to and a non zero value nvoDisconnect1 4 will assume the off and 0 setting nvoOverCurrent1 nvoOverCurrent4 These four network variable outputs indicate which output caused the last over current event Over current events happen when the combined current draw of all outputs exceeds about 1 3amps for 6 AC
12. e group will be placed behind the shrubbery in the front of the home another group in the back yard shrubbery and the garden amp orchard valves will be placed in valve boxes near where the zones are needed Choose Wiring Topology First we need to choose the wiring topology and installation location The following picture shows where the contractor chose to place the 3 valve groups ORCHARD GARDEN ZONES NASE ZONES Bedroom 2 119 n Dining Room 4 w OLG MT 11 x 12 ZO wo aur m per BET yr EE Covered Porch FLOOR PLAN lt FRONT YARD ZONES MASTER VALVE te GARAGE LOCATION W BASEMENT Bibaja Landscape Automation LLC 31 2004 Based on the contractor s choices for valve locations the simplest topology will be bus topology for the wire Bury the wire along the water main line for the irrigation system The water main line 1s the thick black line connecting the checker patterned valve location markers One IVC24 04 device will be located at each valve group The total distance for the 24V AC bus wire will be around 150 feet The 24V AC transformer and the PLC240 will be installed inside the garage on the wall near the first valve group If you live in a colder climate the irrigation contractor may choose to install a manual shutoff valve and a port for connecting a compressor to blow out the water for winterizing your sy
13. ection information for each device as you install them Having this worksheet filled out will simplify software configuration and irrigation scheduling Bibaja Landscape Automation LLC 28 2004 APPLICATION EXAMPLES This section gives several application examples utilizing the IVC24 04 If you have an application idea you would like to submit send an email documenting your application idea to support bibaja com We will periodically publish new applications on our website Lawn amp Garden Irrigation System with Master Valve Using Bibaja s basic system components it is possible to build a simple lawn amp garden irrigation system with the following features e One master valve to shut off all water e 11 irrigation zone valves This application example with go step by step through the process of designing the system for a home such as this one Layout and choice of sprinklers and drip emitters are beyond the scope of this example Work with a professional licensed irrigation contractor to design your system Specify Bibaja irrigation controls in advance so your contractor can plan the wiring and layout Required Components The following components are required to build this system e Three 3 IVC24 04 devices e One 1 PLC240 device e One 1 USB12 01 device Bibaja Landscape Automation LLC 29 2004 e One 1 Computer e 24 volt AC transformer e Wire for 24 volt AC power bus The devices are connected together like t
14. er operation of the current sensing circuit and possible failure of the device Once wiring is complete apply power to the devices and confirm the power LED is illuminated Network Configuration This section applies to users who are using tools such as Echelon s LonMaker for Windows and devices like Echelon s i Lon100 to configure and control the IVC24 04 devices Bibaja is working to develop our own configuration and control software based on the USB 12 01 device If you have feedback about features you would like to see in this software feel free to provide this information by email to feedback bibaja com with the subject Software Feature Request Device Commissioning For this step either have the IVC24 04 Installation Worksheet handy or have a magnet ready to activate the service pin Bibaja Landscape Automation LLC 12 2004 Choose to commission or install a new device using your chosen software package LonMaker for Windows for example When you get to the step for identifying the new device you have the option to either use service pin installation or manual installation For service pin installation select Service Pin and proceed to the point where you are prompted to press the service pin Using a magnet touch it to the symbol on the side of the device Make certain the TX LED flashes at least once to confirm the service pin message has been sent For manual installation either type or scan the NID
15. erCurrent3 nvoOverCurrent4 nvoCurrentRaw nvoCurrentMil Shieh nciMaxRcvTime nvoACFreq NV NC Name Type Default Description Value nviOutl SNVT switch state off Controls output OUT 1 value 0 0 nviOut2 SNVT switch state off Controls output OUT 2 value 0 0 nviOut3 SNVT switch state off Controls output OUT 3 value 0 0 nviOut4 SNVT switch state off Controls output OUT 4 Bibaja Landscape Automation LLC 14 2004 value 0 0 nciMaxRcvTime SCPTmaxRcvTi me 60 0 seconds Output automatic shutoff timer If no update is received on nviOutl through nviOut4 within the configured time nciMaxRcvTime the outputs will be shutoff This helps to prevent flooding in case of controller failure nvoStatel SNVT_switch state off value 0 0 Feedback for the state of output OUT 1 nvoState2 SNVT switch state off value 0 0 Feedback for the state of output OUT 2 nvoState3 SNVT switch state off value 0 0 Feedback for the state of output OUT 3 nvoState4 SNVT switch state off value 0 0 Feedback for the state of output OUT 4 nvoDisconnect 1 SNVT switch depends on connection Feedback to monitor output connection for OUT 1 May also be used as a contact closure input sensor Set to state off value 0 0 when output is connected When contact is closed Set to state on
16. es therefore you will quickly exceed the channel capacity if these connections are bound Instead of binding it is recommended to periodically poll nvoCurrentMil on all devices with active outputs For instructions on using nvoCurrentRaw see the device specification in this manual nvoACFreq This network variable output indicates the line frequency It is updated when the device is reset The line frequency reported will be either 50Hz or 60Hz If the line frequency is 100Hz for some reason it will therefore report 60Hz 40Hz will report as 50Hz This output is not an indicator of the precise line frequency Bibaja Landscape Automation LLC 19 2004 IVC24 04 DEVICE SPECIFICATION Electrical Specifications and Operating Conditions Parameter Min Typ Max Units Vsupply 18 24 28 VAC RMS Isupply 70 100 ma RMS Vout 1 2 3 4 93 of VAC RMS Vsupply Iout combined 300 1200 ma RMS Imeasured 354 1300 ma RMS Ierror 6 6 error Temperature 25 25 70 C ESD 15 kV Vsupply Vsupply is the supply voltage applied to the 24V AC power supply input Note the outputs require AC supply voltage for proper operation Isupply Isupply is the current drawn in milliamps RMS from the 24VAC power supply input Vout 1 2 3 4 Vout 1 2 3 4 is the output voltage when output 1 2 3 or 4 is activated The figure 9396 of Vsupply assumes the supply has at least 1 3amp
17. evice nvoOverCurrent2 SNVT_switch state off value 0 0 Set to state on value 100 0 when OUT 2 was the last output activated before an over current event was detected Bibaja Landscape Automation LLC 16 2004 State be cleared by correcting the problem and reactivating the output or by resetting the device nvoOverCurrent3 SNVT switch state off value 0 0 Set to state on value 100 0 when OUT 3 was the last output activated before an over current event was detected State be cleared by correcting the problem and reactivating the output or by resetting the device nvoOverCurrent4 SNVT switch state off value 0 0 Set to state on value 100 0 when OUT 4 was the last output activated before an over current event was detected State be cleared by correcting the problem and reactivating the output or by resetting the device nvoCurrentRaw SNVT count Raw count output from the current sensor See the device specification section for more information about using this output Output is updated once per second when non zero nvoCurrentMil SNVT amp mil RMS current in milliamps converted from raw current using a 5 segment piecewise linear fit Output is updated once per second when non zero nvoACFreq SNVT freq hz Depends on line frequency Output from the line frequency detector
18. f zones may run on different days or may be programmed to run every other day Using the IVC24 04 For General 24 volt AC Devices The outputs of the IVC24 04 are useful for a variety of different devices other than automatic irrigation valves This application note will give a variety of different devices and manufacturers and suggest some possible uses for them Contactors Contactors are typically used to control large AC loads and devices with significantly higher voltages Large three phase pumps and roof top air handler units are examples of devices that may be controlled using a contactor The IVC24 04 may be used to control devices up to 1 2amps Check the ratings on the 24V AC coil of the contactor you choose to see how much current it draws It is possible to control up to two Cutler Hammer 40amp contactors for example Relays Relays like contactors may be used to drive larger AC loads and higher voltages Typical uses for relays attached to an IVC24 04 are 120VAC landscape lighting control e Irrigation pump control 12 low voltage lighting control e Greenhouse ventilation fan control e Heating cable controls Potter amp Brumfield makes a very economical panel mount double pole double throw relay with a contact rating of 30amps The part number is T92511 A22 24 and is available from www digikey com Air Duct Dampers Air duct dampers or air valves may be used to turn off the conditioned air to a room in you
19. for status Reports either 50 0 or 60 0Hz Bibaja Landscape Automation LLC 17 2004 nviOut1 nviOut4 Connect nv1Outl through nviOut4 to the controller to turn outputs through 4 on and off sense a contact closure This may result in an over current event and possibly damage the contacts of the attached sensor 9 Do not bind nviOut 1 4 if the corresponding output 1 4 is used as an input to nciMaxRcvTime By default nciMaxRcvTime is set to 60 seconds This configuration parameter sets the timeout from the automatic shutoff timer When one of the network variable inputs nviOutl nviOut4 is updated the timer will be initialized to this value and begin counting down When the timer reaches 0 the output will be turned off If the network variable input is updated before the timeout the output will remain active This shutoff timer helps to prevent flooding in the event that the computer or controller responsible for turning the output off fails You may choose this timeout value based on the maximum run time for the 4 attached zones or based on the amount of traffic on your power line network If your controller is fairly simple and does not support heartbeat updates of network variables then the timeout value should be configured to the maximum run time of the attached irrigation zones or devices nvoStatel nvoState4 These four network variable outputs indicate the state of the device outputs 1 4 In a polle
20. his House AC Power 24 volt AC Power The computer communicates with the network through Bibaja s USB12 01 power line network interface For this system the computer is always on and runs a scheduler program to trigger zones in the irrigation system The computer may also provide remote access to your irrigation system Email paging or other notifications may be enabled based on status feedback from the IVC24 04 devices to alert you to problems The sooner you know something has gone wrong the sooner the problem may be repaired saving your investment in landscape plants From the USB12 01 communication signals travel through the house AC power to the PLC240 The 24 volt AC transformer will block power line communications The PLC240 is necessary to bridge communications across the 24 volt AC transformer from the house AC power to the 24 volt AC irrigation power From the PLC240 power line communications travel to the IVC24 04 devices attached to the 24 volt AC power The computer may turn outputs on and off and check device status to confirm everything is operating properly Bibaja Landscape Automation LLC 30 2004 System Layout and Wire Selection For this example system the contractor has decided the front yard reguires 3 zones the back yard and sides require 4 zones and the garden amp orchard areas requires 4 zones One master valve will be installed to handle all zones The valves will be placed in 3 groups On
21. iBaJa Landscape Automation IVC24 04 User s Manual Version 1 0 2004 Bibaja Landscape Automation LLC INTRODUCTION DOCUMENT ORGANIZATION INSTALLATION REOUIRED COMPONENTS FOR A BASIC SYSTEM 24 VOLT AC TRANSFORMER SELECTION CHOOSING THE INSTALLATION LOCATION AND WIRING TOPOLOGY CHOOSING THE RIGHT WIRE DEVICE INSTALLATION WORKSHEET DEVICE WALL MOUNTING VALVE BOX INSTALLATION WIRING THE DEVICE NETWORK CONFIGURATION DEVICE COMMISSIONING NETWORK VARIABLE CONNECTIONS IVC24 04 DEVICE SPECIFICATION ELECTRICAL SPECIFICATIONS AND OPERATING CONDITIONS VSUPPLY ISUPPLY VOUT 1 2 3 4 IOUT COMBINED IMEASURED IERROR TEMPERATURE ESD DEVICE FEATURES TRIAC OUTPUTS DISCONNECTED OUTPUT DETECTOR CURRENT MEASUREMENT POWER SUPPLY AND POWER LED MICROCONTROLLER WITH EMBEDDED POWER LINE COMMUNICATIONS NETWORK ACTIVITY LEDS MAGNETICALLY ACTIVATED SERVICE PIN APPLICATION EXAMPLES LAWN GARDEN IRRIGATION SYSTEM WITH MASTER VALVE REOUIRED COMPONENTS SYSTEM LAYOUT AND WIRE SELECTION Bibaja Landscape Automation LLC 1 20 20 20 20 20 20 20 20 21 21 21 21 21 22 27 27 28 28 29 29 29 31 2004 SYSTEM SETUP AND OPERATION 33 USING THE IVC24 04 FOR GENERAL 24 VOLT AC DEVICES 34 CONTACTORS 34 RELAYS 34 AIR DUCT DAMPERS 34 DRIVING DC DEVICES 35 UsiNG THE IVC24 04 OUTPUTS AS INPUTS 35 Bibaja Landscape Automation LLC ii 2004 INTRODUCTION The IVC24 04 is a four output device
22. input etc If the device is attached to a Cutler Hammer contactor for example then record that information as well since the contactor may require more inrush current to actuate properly The note space should be used to record any other special information about the connections The IVC24 04 NID barcode is found on a label on the side of the device The label should look similar to this 050001020300 i The NID is all numbers and letters between the two on the label The symbol is where to touch a magnet for activating the internal service switch to send the unique ID over the network for installation Bibaja Landscape Automation LLC 9 2004 IVC 24 04 Installation Worksheet Job Install Date MM DD YYYY IVC24 04 NID sk from Barcode a I O Device Location Output Zone Zone Name Connected To Notes Bibaja Landscape Automation LLC 10 2004 Device Wall Mounting The IVC24 04 provides two screw holes outside of the sealed area for wall mounting To attach the IVC24 04 to a wall Turn off power to IVC24 04 if powered Loosen the black cable gland nut Push and turn the 4 screw latches 4 turn to release the Carefully slide the lid of the IVC24 04 along the cable out of the way Get a pencil Hold the base of the IVC24 04 against the wal
23. ion LLC 7 2004 500 I8AWG ISAWG 18AWG I4AWG 12AWG 150 I8AWG I8AWG I4AWG I2AWG 10AWG 1000 I8AWG I8AWG 14AWG I2AWG 10AWG 1500 18AWG I4AWG 12AWG IOAWG 8AWG 2000 18AWG 14AWG I2AWG SAWG 2500 I8AWG 14AWG 1OAWG SAWG 3000 18AWG I2AWG 10AWG 4000 I4AWG IZAWG 8AWG 5000 I4AWG IOAWG 8AWG 7500 12AWG 8AWG lt 10000 10AWG 8AWG The criteria for producing this gauge chart was what gauge of wire would produce less than 3 5 volts of drop at the rated current over the distance in feet For our example of 500ft of wire with a current requirement of 4400ma we would need SAWG wire Note for this example you could eliminate the need for the 8AWG wire by placing the IVC24 04 that controls the current hungry pump relay close to the 24VAC transformer This removes the pump relay from the longest wire segment and places it on an isolated segment This is better design practice and may result in wiring cost savings Placing the pump relay control close to the 24V AC transformer will allow the 500ft wire segment to be reduced to 14AWG wire 1000ma for 500ft This topology is basically a combination of the star and bus topology If your system requires more current consider running multiple bus power feeds in a star topology back to your 24VAC transformer and divide the current among the different power feeds Using a combina
24. itches reduces the current consumption and simplifies the power supply design The triacs are optically isolated from the microcontroller for protection from external electrical disturbances Each of the 4 output circuits looks like the following diagram 24VAC Line Digital Out e Out 1 2 3 or 4 r Common Isense 0 5 ohm Neutral Note the 0 5ohm current sense resistor is shared between all 4 output circuits The 4 common wires are provided for wiring convenience Connecting commons between different IVC24 devices will cause improper operation of the current sense circuit See the section Current Measurement for more details Disconnected Output Detector The disconnected output detector relies on leakage in the output triac to determine when an output has been disconnected Relay coils irrigation valve solenoids and other typical loads have a resistance much less than 1k ohms This load will provide a path for the leakage current back to Neutral The path to Neutral is broken when the load is disconnected This disconnect 1s then easily detected by providing an alternate path with a much higher resistance Bibaja Landscape Automation LLC 21 2004 The following circuit diagram shows the disconnect detect sense resistor connected to the output 24VAC Line Digital Out Opto a Disconnect Detect Out 1 2 3 or 4 r Common Isense
25. l in the desired location and mark the two hole locations with the pencil Set the IVC24 04 aside and pre drill the screw holes if necessary e Feed screws into the base of the IVC24 04 unit being careful not to drop the screws onto the exposed electronics e Tighten the screws into the holes in the wall just until snug DO NOT OVER TIGHTEN MOUNTING SCREWS Over tightening the screws could warp or crack the case compromising the sealed chamber e Slide the lid back along the cable and onto the base e Push and turn the 4 screw latches 4 to secure the lid e Tighten the black cable gland nut Valve Box Installation The IVC24 04 devices are in sealed NEMA4 IP65 enclosures enabling installation outdoors or in below ground valve boxes The IVC24 04 may be attached to the underside of the valve box lid following the procedure for device wall mounting The preferred method is to simply install the valve in the bottom of the valve box as normal attach the wires to the IVC24 04 using waterproof connections and lay IVC24 04 in the valve box resting on top of the valve assembly The IVC24 04 comes with about 2 feet of cable so it makes it easy to lift the IVC24 04 out of the way if you need to access the valve or replace the valve solenoid Wiring the Device Outdoor connections should use water resistant connections such as wire nuts with grease caps Indoor connections may be made using wire nuts or by crimping quick disconnect or screw te
26. le will change to state with value 1 The following are a few examples of device types that may be attached PIR Motion Detectors example Slimline PIR Detector from www smarthome com e Float Switches example LVK 10 switch from www omega com e Trip wires to detect when someone walked through an area when wire breaks Note Do not activate an output that has one of these devices attached The IVC24 04 will detect the over current condition after 6 AC cycles and automatically turn off However it may do damage to the attached device Bibaja Landscape Automation LLC 35 2004
27. lity to perform remote diagnostics remote application upgrades and the ability to transfer a variety of rich data types The PL3120 E4T10 microcontroller communicates using two carrier frequencies The primary carrier frequency is approximately 132kHz The secondary is approximately 115kHz The secondary frequency is only used if the first two attempts on the primary carrier are not acknowledged Remote diagnostics are possible with the microcontroller Application firmware keeps statistics for number of packets received CRC errors missed messages last error logged last cause of reset and other useful information for remote diagnosis of problems The application firmware is stored in electrically erasable programmable memory or EEPROM for short This memory may be rewritten 10 000 times New application firmware may be downloaded into the unit without removing it from the field New features customer requested features and bug fixes are all possible using this remote upgrade capability Rich data types are available above and beyond simple on off dim controls Soil moisture date amp time wind speed and direction current consumption and water flow rate are all examples of data that may be transferred across the network and logged in the central controller The IVC24 04 uses these flexible data types to provide feedback for Bibaja Landscape Automation LLC 27 2004 output state output disconnect output over current current cons
28. ma 4 at 100ma each maximum Pump Relay 4000ma inrush 600ma typical Fertigation Valve 700ma inrush 300ma typical Zone Valve 700ma inrush 300ma typical Note the inrush current requirement of the pump relay is 4amps 4000ma The wire must be chosen to guarantee this current spike does not cause the voltage to dip beneath 18V or the pump relay may not activate The maximum inrush current calculation is the worst device plus the static current drawn by always on devices like the IVC24 04 Inrush 100ma 4 4000ma Inrush 4400ma Since the pump is the first device activated the current of the fertigation valve and zone valve do not need to be included in the inrush calculation The typical operating current will be the maximum current for the 4 IVC24 04 devices the pump relay current the fertigation valve and one of the zone valves Typical 2 100ma 4 600ma 300ma 300ma Typical 2 1600ma Use the larger of the two currents to determine the wire size and the transformer requirement for your system In this case choose the inrush current of 4400ma If you plan to expand your system later add some excess current to account for future devices as well Use the following table to determine the wire gauge based on your longest wire segment and the current consumption on that wire Maximum Longest Wire Segment feet Current ma 100 250 500 1000 1500 Bibaja Landscape Automat
29. may give an early warning allowing a solenoid to be replaced before it fails Bibaja Landscape Automation LLC 26 2004 Power Supply and Power LED The power supply requires AC power 50 or 60Hz from 18 up to 28Vrms Typical input voltage is 24Vrms The power supply is non isolated fuse protected and has an MOV for protection from voltage spikes and other momentary transients on the 24V power line It is a good idea to wire Line and Neutral consistently throughout the network just in case accidental connections are made between different IVC24 04 devices The Power LED is connected to the first DC stage of the power supply This stage varies from 25 to 40 volts DC proportional to input power Brief high current drain such as packet transmissions will cause fluctuations in the Power LED brightness Microcontroller With Embedded Power Line Communications The microcontroller with embedded power line communications that makes this device possible is the Echelon PL3120 EAT10 This 10MHz microcontroller packs 3 processors and a powerful DSP based power line transceiver into a tiny 38 pin TSSOP package Communication on the power line network is two way request and acknowledge This two way acknowledged communication provides much more robust communication compared with X10 Sure X10 has two way communication but X10 still lacks robust forward error correction an alternate carrier frequency in case the primary one is blocked and the abi
30. ocument is organized into three major sections 1 Installation Provides a detailed guide for 24V AC transformer selection wiring topology and mounting of the IVC24 04 Also gives a brief guide to installing and configuring the IVC24 04 using LonWorks network management tools 2 Device Specification Specifies the voltage and current ratings for the device Also provides an in depth overview of device operation These details may be of interest to people who wish to understand how the circuits operate in more detail 3 Application Examples Application ideas for the IVC24 04 device Bibaja Landscape Automation LLC 1 2004 INSTALLATION Reguired Components for a Basic System The reguired components to build a basic system are One IVC24 04 for every 4 zone valves e One 24 volt AC transformer for supplying power e One PLC240 to bridge communications across the 24 volt AC transformer e One USB12 01 power line network interface for your computer or other compatible LonWorks powerline interface Available from www engenuity com e Onecomputer to run the system log data and interface with the internet Here is diagram showing an example system and connections House AC c 20979099 Power c 97999969 24 volt AC USB12 01 Transformer 24 volt AC Power 24 volt AC Transformer Selection Selecting the right 24 volt AC transformer for your system depends on the system s maximum current requirement Consider
31. ofit every two wires would be connected together to bring 24V AC power to each IVC24 04 installed with each of the 4 valve groups like this Bibaja Landscape Automation LLC 4 2004 NEUTRAL AE T 1 2 3 4 5 e 7 s 9 10f11 12 13 14 15h6 c SOK N NOTUSED gt 24 04 24 04 hz d D d I gt 5 lt 24 04 24 04 l c DK i i i bk LL c m em emm um c i 7 7 The original valve control wires now carry 24V AC power and control signals to each IVC24 04 Pairing every two wires insures adequate current and voltage for each IVC24 04 and provides a little extra for system expansion The original common is cut at each valve group so only 4 valves are on each common indicated by dashed lines in diagram This new 4 valve common is wired to the IVC24 04 corresponding to the valve group New controllers may be quickly added in the field by chaining a pair of wires from the closest 24V AC power feed to the new valve group New installations may choose a star or bus topology for the wiring For star topology wiring all of the IVC24 04 devices would be mounted in one location such as a garage or utility building wall with output wires pulled out to each valve group One disadvantage with this topology is the cost of the wire Having long wires f
32. ower 3 How many devices IVC24 04 and other are on the longest wire segment 4 How many outputs will be active at the same time and what is the maximum current consumption of each output If the answer to questions 1 1s star topology you don t really need to answer the remaining questions For distances less than 100 feet between the 24V AC transformer and the IVC24 04 devices 18AWG wire should be sufficient 14AWG wire should be used for current consumption greater than 3 amps or distances greater than 100 feet from Bibaja Landscape Automation LLC 6 2004 the 24VAC transformer to the IVC24 04 devices Typically 18A WG wire is used to connect from the IVC24 04 to the remote valves Installers may wish to consider running a spare I4AWG wire pair carrying 24V AC out in the field This will provide for easier expansion in the future If the answer to question 1 is bus topology you must provide estimates for the answers to questions 2 4 Questions 3 and 4 are used to determine the maximum current consumption on the longest wire segment Consider a situation where you have 4 IVC24 04 devices on a 500ft wire segment This segment has a pump control relay a fertigation valve and zone valves One and only one zone valve is active at a time The pump control relay one zone valve and the fertigation valve may all be active simultaneously Find the maximum current consumption numbers for each device attached to the wire segment IVC24 04 400
33. r home that isn t in use Using the IVC24 04 you can save money by turning off the air to unoccupied or unused rooms This provides more heat or air conditioning to the rooms that need it Bibaja Landscape Automation LLC 34 2004 These 24 volt activated dampers are part number 3080 available from SmartHome http www smarthome com 3080 html Driving DC Devices Certain devices may require direct current or DC Driving these devices is as simple as adding a diode in series with the output terminal of the IVC24 04 This will provide half wave rectified DC voltage for driving a motor or other device attached to the output By attaching a full wave bridge rectifier to the output more energy may be applied to the DC load Attach the output and common to the inputs of the bridge Attach the outputs from the bridge to your device Measure the output voltage from the rectifier to be sure it is within the ratings of the device you are trying to drive Using the IVC24 04 Outputs as Inputs It is possible to use the IVC24 04 disconnected output detector to turn the IVC24 04 outputs into inputs Certain device types with cold contact outputs may be attached to the IVC24 04 outputs When the contacts are closed the IVC24 04 will think that an output is attached The corresponding network variable output nvoDisconnect 1 4 will then change to the state off with value 0 When the contacts are open the nvoDisconnect 1 4 network variab
34. rminal connectors onto the bare wires The wires of the IVC24 04 are color coded as indicated on the lid of the device LINE BROWN 24V AC POWER NEUTRAL BLUE OUTPUT 1 SUPPLY ORANGE COMMON OUTPUT 2 SUPPLY YELLOW Bibaja Landscape Automation LLC 11 2004 COMMON GRAY OUTPUT 3 SUPPLY VIOLET COMMON GREEN SUPPLY RED OUTPUT 4 COMMON BLACK Attach the LINE NEUTRAL connections to the 24VAC power wires Try to keep the LINE and NEUTRAL connections consistent between devices in the field Keeping LINE and NEUTRAL consistent throughout the installation will prevent damage in the event that commons from two different IVC24 04 devices become shorted together Attach the LINE NEUTRAL connections to the 24V AC power bus wires Try to keep the LINE and NEUTRAL connections consistent between devices in the field This will prevent damage in the event that commons from two different IVC24 04 devices become shorted together Connect the output SUPPLY wires to valves relays contactors or to the anode positive terminal of diodes for devices requiring DC power See the applications guide for more information The four COMMON wires are common only to the outputs of a specific IVC24 04 device One common wire may be used for all 4 outputs or all 4 commons may be attached one per output 9 Do not connect the commons of different IVC24 04 devices together This will cause improp
35. rom the IVC24 04 to the valves may cost more than the bus topology Adding more zones is also Bibaja Landscape Automation LLC 5 2004 difficult with the star topology New output wires must be routed and buried from the central controller location to the valves resulting in more digging and more labor costs For bus topology wiring the IVC24 04 devices may be installed in the field near the valves One pair of wires carrying 24V AC power would be bussed between each IVC24 04 The IVC24 04 would be used to control the nearest 4 valves and could be located inside one of the valve boxes For example 24VAC VALVE BOX VALVE BOX VALVE BOX VALVE BOX E VALVE BOX 5 VALVE BOX One advantage of the bus topology 1s a reduction in wiring costs compared to the star topology Only two wires go out into the field to each valve group Another advantage is the ease of adding more devices Extending your system is as easy as tapping the nearest 24V AC bus wire connecting an IVC24 04 and adding valves to the nearest water feed pipe Choosing The Right Wire Choosing the right wire will insure reliable system operation The right wire will supply sufficient current and voltage for powering remote IVC24 04 devices and valves To choose the right wire you will need to be able to answer the following questions 1 What topology of wiring did you choose bus or star 2 What is the longest wire segment carrying 24V AC p
36. s of current available lout combined Iout combined is the maximum output current allowed on all 4 outputs combined If this current limit is exceeded for more than 6 AC cycles in a row all outputs will be turned off and the last output turned on will be flagged as the one that caused the over current condition Imeasured Imeasured is the range of the current measurement circuit Currents below 354 milliamps RMS do not cross the voltage reference used to perform the current measurement Above 1300 milliamps RMS the over current detector will turn all outputs off lerror Ierror is the range of error for the piecewise linear fit used to calculate the network variable output nvoCurrentMil It is possible to achieve higher accuracy by trimming the piecewise linear model or by using the network variable output nvoCurrentRaw to create your own best fit model for the current See the Current Measurement section for more information Bibaja Landscape Automation LLC 20 2004 Temperature Temperature 1s the operating temperature range of the device The device will function to 85C if you use only 1 output at a time and limit the load current to less than 600ma ESD ESD is the electrostatic discharge limit to which the devices were tested during development At 15 kilovolts the device showed no failures or resets Device Features Triac Outputs There are four triac driven outputs on the IVC24 04 Using triacs for output sw
37. stem Selecting the Wire The wire for the 24 volt AC power should be selected according to the section Choosing The Right Wire There are 4 questions to be answered 1 What topology of wiring did you choose bus or star 2 What is the longest wire segment carrying 24V AC power 3 How many devices IVC24 04 and other are on the longest wire segment 4 How many outputs will be active at the same time and what is the maximum current consumption of each output For this system the wiring topology is bus topology The longest wire segment is about 150 feet There are 3 IVC24 04 devices on the longest wire segment Finally for question 4 there are two outputs active at the same time master valve and zone valve The maximum current consumption will be the steady state current for the master valve and the inrush for one of the zone valves plus the current consumption of the 3 IVC24 04 units Master Valve 300ma Maximum Steady state Current Zone Valve 700ma Inrush Current 3 IVC24 04 Devices 300ma Maximum Steady state Current Total 1300ma Maximum required current From the chart in the installation section the example system falls in the column 250ft and the row 1500ma making the wire selection 14AWG wire Installing the system Now you have defined e The location for the 24VAC transformer and PLC240 In the Garage e The location for the IVC24 04s At each valve group e The wiring topology Bus topology 15
38. tal Out Opto gt 22 Disconnect Detect Out 1 2 3 or 4 r Common Isense Imeasure z Vref 0 5 ohm Neutral The output Imeasure will only trigger when the signal Isense is larger than the voltage reference Vref Vref is set to approximately 0 25 volts with some hysteresis to reject noise This means the minimun trip current will be I V R Ohm s Law 0 25 V 0 5 ohm Plug in Vref and current sensor resistor values I 0 5 amps Minimum peak trip current I 0 5 sqrt 2 Divide by sqrt 2 to find RMS current I 0 354 amps RMS Minimum RMS trip current At around 354 milliamps therefore the current sensor will begin to measure current The Imeasure pulse from the comparator will be relatively short and will resemble the following graph Bibaja Landscape Automation LLC 23 2004 Imeasure for 1 AC Cycle 0 6 m 04 02 0 Current lmeasure 0 2 5 O 0 4 0 6 O amp AB ah Xl o 5 O cQ YL N N NV N N o gt o gt NY gt Q o o Time seconds Imeasure is an active low digital signal shown in yellow and is scaled amp overlaid on top of the current waveform The peak of the current is around 0 5amps and is just enough to trip the comparator Note the current sensor does not operate in the negative half cycle of the AC waveform Outputs are activated at the beginning of a positive AC half cycle This g
39. tion of star and bus topology wiring may be more economical than using wire larger than 12AWG Direct burial wire from 18AWG through 12AWG is readily available Also consider placing high current consumption devices close to the 24VAC supply transformer Bibaja Landscape Automation LLC 8 2004 Device Installation Worksheet Recording key information while installing the IVC24 04 devices will make the software setup much simpler To assist with this task we have provided the device installation worksheet on the following page Print out copies of this worksheet fore each IVC24 04 device installed and record the device information to make software configuration simpler These worksheets will also serve as a record for the installer and the system owner for what device outputs control what zones and where the devices are physically located The worksheet has spaces to record several key pieces of information e VC24 04 NID From Barcode o This is the 12 character unique ID found on the barcode on the side of the IVC24 04 device This ID is used to communicate with the device through the power line network e Output 1 2 3 and 4 o These rows are to record information about what is connected to each output of the IVC24 04 device e Connected To o Record what this output is connected to This information is important for configuring this output as a zone valve control fertigation valve control master valve control contact closure sense
40. uarantees the minimum time between output activation and over current detection At 1 3amps RMS the Imeasure pulse will almost cover the entire positive half cycle as shown in the following graph Bibaja Landscape Automation LLC 24 2004 Imeasure for 1 AC Cycle 2 5 2 15 1 g 7 Current E 05 Imeasure E 4 1 5 2 2 5 do 8 m GP HOP AS LO OU AS 20 o o Pw OP PO S Time seconds Two network variable outputs are provided from the current measurement circuit The first named nvoCurrentRaw is type SNVT count and is the duration in 400ns ticks that the signal Imeasure was low For example if the value of nvoCurrentRaw is 6500 the duration of the Imeasure pulse was Duration nvoCurrentRaw 400ns Duration 6500 400 ns Duration 2600000 ns 2 6 ms Using nvoCurrentRaw a function may be derived that more accurately converts the Imeasure time duration into an RMS current value The second current measurement network variable output named nvoCurrentMil is type SNVT amp mil nvoCurrentMil uses a piecewise linear function to convert the Imeasure pulse time into RMS current in milliamps The following graph shows the measured current vs the piecewise linear current for an IVC24 04 unit across the current measurement range Bibaja Landscape Automation LLC 25 2004
41. umption and AC line freguency See Bibaja s IOPoint product line if you would like to learn how you may easily embed this powerful microcontroller in your own application Network Activity LEDs The network activity LEDs TX and RX indicate when a packet is transmitted by this device TX or received by this device RX Magnetically Activated Service Pin The magnetically activated service pin is used to transmit the unique ID called the Neuron ID NID for short for installation On one side of the IVC24 04 you will see a label with a barcode and a lightning bolt 050001020300 i Touch a magnet to the amp amp symbol on the label to activate the service pin and transmit the NID A magnetic reed switch inside the IVC24 04 will trigger the microcontroller to send the NID across the power line network Watch the TX LED to determine when the NID has been sent If you are having difficulties activating the service pin you may wish to try a stronger magnet The number on the barcode between the is the NID In the example label the NID is 05 00 01 02 03 00 The unique NID on the barcode is always 12 numbers and letters in the range 0 to 9 and from A to F As an alternative to using the service pin for installation this number may be typed or scanned into the computer to install the IVC24 04 In the installation section of this document we recommend that you record this number in the worksheet along with output conn
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