User manual
Contents
1. 1 2 gt 34 If EVENING MORNING is selected Programming Menu 5 allows choosing the MORNING timing behaviour and Programming Menu 4jallows choosing the EVENING timing behaviour Mind that the load output is switched off as soon as the battery has reached the Low Voltage Disconnect threshold The Low Voltage Disconnect has priority above the nightlight function Mid of night is detected automatically as the middle between dusk and dawn no real time setting is required It may take some days until the controller has learnt midnight This method can cause some inaccuracy but avoids any clock readjustment The controller s Mid of night can be different from the real time midnight depending on your location The controller recognizes day and night based on the solar array open circuit voltage In Programming Menu 6 this day night threshold can be modified according to the requirements of the local conditions and the solar array used gt A gt A pa lt _ gt Threshold setting range 7 7 15 4V Switching point day gt Night Switching point Night gt day 4 9 9 8V Factory setting 1 0 2 0V Curve of open circuit voltage solar array 35 The two voltage levels before after the slash are valid for 12 V and 24 V systems respectively To find the right value we recommend measuring the solar array open circuit2. Temperature compensation 4mV cell K Max solar panel current 10 20 40A according to model number 25 C without load current at 50 C Max load current 10 20 40A according to model number 25 C without solar current at 50 C Dimensions 92x93x38mm w x h x d Weight CXN10 CXN20 168gr CXN40 179gr Max wire size 16mm AWG 6 Self consumption 6mA Ambient temperature range 25 to 50 C Case protection 1P22 Subject to change without notice Version 20081006 Made in one of the following countries China Germany Phocos AG Germany www phocos com 1509001 2000 Ce RoHS 44 Setting State of Charge Main Menu Display Menu Programming Menu flashing Factory Your E Battery type PE O teem Gog liquid electrolyte De C 1 e Battery type O GEL VRLA Load on off 2 Low voltage disconnect current compensated 11 4 11 9V Low voltage disconnect current compensate 0 11 gt pi d 11 0 11 75V Short push lt 1 Second yA LYD current compensated gt E adaptive 11 0 12 2V Long push gt 1 Second 98 Low voltage disconnect 11 5V L efs z Y f ag Low voltage disconnect 11 0V y gt 3 aaa see gl se Nightlight function OFF ape Nightlight function f e DUSK TO DAWN ea Nightlight function KA EVENING MORNING w 4 pl ago Lis
3. 0 phocos Phocos CXN Bedienungsanleitung User Manual Manual de Instrucciones Guide de l utilisateur Manual do Usuario ER FM CID NO 181811101 CONTENTS Bedienungsanleitung Deutsch User Manual English Manual de Instrucciones Espa ol Guide de l utilisateur Francais Manual do Usuario Portugu s ERFA SARA 23 44 45 66 67 88 89 110 111 132 phocos Phocos CXN Programmable Solar Charge Controller with Negative Ground User Manual English Dear Customer Thank you for buying Phocos A product Please read the instruction carefully and s thoroughly before using the product 23 Your new CXN controller is a state of the art device which was developed according to the latest available technical standards It comes with a number of outstanding features such as E Multifunctional LCD display m Programmable Low Voltage Disconnect with new ALVD Adaptive Low Voltage Disconnect E Sophisticated programmable nightlight function m Complete electronic protection m Negative Grounding This manual gives important recommendations for installing using and programming as well as remedies in case of problems with the controller Read it carefully in your own interest and mind the safety and usage recommendations at the end of this manual Major Functions E The charge controller protects the battery from being overcharged by the solar
4. array and from being deep discharged by the loads The charging characteristics include several stages which includes automatic adoption to the ambient temperature The charge controller adjusts itself automatically to 12V or 24V system voltage The push button allows switching the load on and off manually The charge controller can be programmed for lighting applications Additionally it has a serial interface which can be used with an optional interface adapter CX l 24 for functions of datalogger E The charge controller has a number of safety and display functions Recommendations for Use E The controller warms up during normal operation If there is insufficient ventilation e g in an installation cabinet the controller limits the solar charge current to prevent overheating E The controller does not need any maintenance or service Remove dust with a dry tissue HM Itis important that the battery gets fully charged frequently at least monthly Otherwise the battery will be permanently damaged EH A battery can only be fully charged if not too much energy is drawn during charging Keep that in mind especially if you install additional loads Mounting and Connecting the Charge Controller The controller is intended for indoor use only Protect it from direct sunlight and place it in a dry environment Never install it in humid rooms like bathrooms The controller measures the ambient temperature to adopt the chargi
5. je Nightlight function EVENING 5 HRS Nightlight function EVENING TO 4 HRS before mid of night Nightlight function EVENING TO 3 HRS before mid of night Nightlight function EVENING TO 2 HRS before mid of night Nightlight function EVENING TO 1 HR before mid of night Nightlight function EVENING TO mid of night Nightlight function MORNING OFF Nightlight function MORNING 1 HR Nightlight function MORNING 2 HRS Nightlight function MORNING 3 HRS Nightlight function MORNING 4 HRS Nightlight function MORNING 5 HRS Nightlight function MORNING FROM 2 HRS after mid of night Nightlight function MORNING FROM 3 HRS after mid of night Nightlight function MORNING FROM 4 HRS after mid of night Nightlight function MORNING FROM 5 HRS after mid of night i ase Nightlight function EVENING OFF Nightlight function EVENING 1 HR x Nightlight function EVENING 2 HRS Nightlight function EVENING 3 HRS Nightlight function EVENING 4 HRS y E Nightlight function MORNING FROM 6 HRS after mid of night Day Night threshold 1 0 2 0V Solar voltage Day Night threshold 1 6 3 1V Solar voltage Day Night threshold 2 1 4 2V Solar voltage B Day Night threshold E 2 7 5 4V Solar voltage y B Day Night threshold AR 3 2 6 5V Solar voltage y SEM D
6. this menu The default load ON hours before sunrise is O hr Menu 6 Day Night threshold In this menu you can set the open circuit voltage of PV panel that the CXN controller should know it s day or night The default day night threshold is 4 9V for 12V PV system 9 8V for 24V PV system Menu 7 Buzzer on off You can turn ON turn OFF the buzzer in this menu 38 Menu 8 Settings of Excess Energy Management and datalogger To use CXI or CXM the functions of CXN interface should be properly set in this menu Menu 9 Individual factory settings You can save your current menu setting or reset to default factory setting in this menu Programming logout When you exit programming menu the controller displays the state of charge available energy of the battery and the status of the load E Mind that once you have entered the programming menu you can exit it at the last item only m We therefore recommend that you first note down your required settings in the check boxes beside the menu structure and then do the programming in one go This makes programming easier and avoids errors m All programming settings are stored in a non volatile memory and remain stored even if the controller was disconnected from the battery Safety Features The controller is protected against wrong installation or use 39 At the solar At the battery At the load terminal terminal terminal Battery connected with correct U
7. under all circumstances We recommend connecting a fuse slow acting type according to the nominal regulator current directly to the battery terminal Batteries can produce flammable gases Avoid making sparks using fire or any naked flame Make sure that the battery room is ventilated Avoid touching or short circuiting wires or terminals Be aware that the voltages on specific terminals or wires can be up to double the battery voltage Use isolated tools stand on dry ground and keep your hands dry Keep children away from batteries and the charge regulator Please observe the safety recommendations of the battery manufacturer If in doubt consult your dealer or installer Liability Exclusion The manufacturer shall not be liable for damages especially on the battery caused by use other than as intended or as mentioned in this manual or if the recommendations of the battery manufacturer are neglected The manufacturer shall not be liable if there has been service or repair carried out by any unauthorised person unusual use wrong installation or bad system design Opening case voids warranty 43 Technical Data Nominal voltage 12 24V automatic recognition Absorption voltage 14 4728 8V 25 C 0 5 2h Equalization voltage 14 8 29 6V 25 C 2h Float voltage 13 7 27 4V 25 C Load disconnect voltage 11 0 12 2 22 0 24 4V depending on setting Load reconnect voltage 12 8 25 6V
8. 11 75 V at no load current Mode with lower disconnection point Battery is cycled deeper this can shorten battery lifetime Mode 3 Disconnect at 11 0 V to 12 2 V depending on load current and previous charging cycles This adaptive mode leads to longer lifetime of the battery because it allows recovery of the battery by full recharge Maximum battery life Mode 4 Disconnect at 11 5 V fixed setting Appropriate if bypass loads draw current directly from battery 33 Mode 5 Disconnect at 11 0 V fixed setting Appropriate if bypass loads draw current directly from battery Mode with lower disconnection point Battery is cycled deeper this can shorten battery lifetime The controller is preset to Mode 1 from the factory Use Programming Menu 2 to change the setting see back page In case of doubts which mode to choose consult your dealer because this has to be evaluated depending on the battery used Nightlight Function The CXN controller comes with a sophisticated nightlight function It controls the load output at night and is widely programmable There are 2 modes available DUSK TO DAWN and EVENING MORNING The mode can be selected in Programming Menu 3 gt A I a Light on Dusk to Dawn Light off Evening Timing Mid of night Morning Timing Light on Light off Number of hours or Timetomidof Timetomid or Number of after night hours 1 2
9. Any change of the state of charge SOC to a lower status is additionally signalled acoustically System conditions are displayed as follows gt 80 60 80 35 60 10 35 lt 10 Load disconnect PNR 2 Le Lo gt o NE GO Gee gr ga 1x 2x 3x 4x 5x The percentage corresponds to the available energy until Low Voltage Disconnect in relation to a fully charged battery As long as the solar array supplies enough voltage to charge the battery this is indicated by up moving bars alternately to the state of charge display In normal operation the loads can be switched on and off by pushing the button This is indicated in the display Load Load Manually ON Manually OFF 32 Special conditions are shown in the LCD display if the Low Voltage Disconnect function shuts off the load output or in case of various other error conditions See section ERROR DESCRIPTION for details Acoustics Signals The controller has an acoustic signal which indicates the change of the state of charge This function can be deactivated in Programming Menu 7 Description of Functions Low Voltage Disconnect Function LVD The controller has 5 different modes to protect the battery from being deep discharged Mode 1 Disconnect at 11 4 V at nominal load current up to 11 9 V at no load current Normal operation mode for good battery protection Mode 2 Disconnect at 11 0 V at nominal load current up to
10. arity Never connect loads during this condition REMARK The controller has a built in voltage drop compensation which automatically compensates battery wire voltage drops of up to 250 mV REMARK Mind the recommendations of your battery manufacturer We strongly recommend connecting a fuse directly to the battery to protect any short circuit at the battery wiring The fuse must take the charge controller nominal current CXN10 154 CXN20 30A CXN40 504 Connect the wires leading to the solar array with correct polarity To avoid any voltage on the wires first connect the controller then the solar array Mind the recommended wire size CXN10 min 2 5 mm CXN20 min 4 mm CXN40 min 10 mm 28 REMARK place positive and negative wire close to each other to minimize electromagnetic effects REMARK Solar panels provide voltage as soon as exposed to sunlight Mind the solar panel manufacturer s recommendations in any case O To avoid voltage at the load terminal push the button to shut off the load output Connect the wires leading to the loads with correct polarity Mind the recommended wire size CXN10 min 2 5 mm CXN20 min 4 mm ie CXN40 min 10 mm Fasten the strain relieves 29 Close the terminal lid Now you have successfully connected your CXN controller Grounding the Solar System 30 Be aware that theCXN is negative grounding a
11. ay Night threshold PA 3 8 7 6V Solar voltage Day Night threshold 4 4 8 8V Solar voltage a Day Night threshold 4 9 9 8V Solar voltage ME oe Day Night threshold 5 5 11 0V Solar voltage Day Night threshold 6 0 12 1V Solar voltage Day Night threshold 6 6 13 2V Solar voltage Day Night threshold 7 2 14 3V Solar voltage Day Night threshold 7 7 15 4V Solar voltage 1 DC 01 Cl bl Ci Co Ci Ci Ci Ci opa Ci Ci Ci ci Ci Ci Ci 00X0000000000X00X0 0 Ci O K x Buzzer ON Buzzer OFF Serial interface EXCESS ENERGY amp CURRENT DATA Serial interface EXCESS ENERGY amp DATALOGGER CIC CI Cl Ci Ci Co Ci Ci Ci ci Ci Cl Ci Ci Co Ci Ci Ci Ci CI Ci Ci Ci Co Ci Ci Ci Co Ci Ci Ci Ci Co Ci Ci Ci Co CI Ci CIfCI CI Ci Ci AYO e Serial interface BIDIRECTIONAL f 8 JU NO EXCESS ENERGY be O Reset to factory preset x 9 E Ke indivi it Date of your ae age ape eep individual settings ON a Ae Le 4 own settings sy
12. ically after max 1 minute Controller is thermally overloaded and has disconnected the loads Check proper ventilation of controller After cooling down the loads are reconnected automatically Battery voltage too high gt 15 5 31 0 V Check if other sources overcharge the battery If not controller is damaged Ki Battery wires or battery fuse damaged battery has high resistance Check battery wires fuses and battery 41 Error Description continued Error condition Display Reason Remedy Battery is flat Battery has low after short time SH capacity diem baii Battery is not ee Solar array being charged No ger vug faulty or wrong Check Or ae and during daytime polarity s Battery wrong Permanent Gatley is th Remove reverse lant d connected wi E La Soup reverse polarity polarity Controller is Mount controller at a thermally location with better Controller limits overloaded ventilation solar current P Solar array exceeds nominal Check solar array Flashes current of current controller General Safety and Usage Recommendations Intended Use The charge control er is intended for use in photovoltaic systems with 12 V or 24V nominal voltage It shall be used with vented or sealed VRLA lead acid batteries only 42 Safety Recommendations Batteries store a large amount of energy Never short circuit a battery
13. nd the negative terminals of the CXN controller are connected internally and therefore have the same electrical potential If any grounding is required always do this on the negative wires Starting up the Controller Self Test As soon as the controller is supplied with power either from the battery or the solar array it starts a self test routine This is indicated first by running LCD bars for approx 0 5 seconds and then the firmware version is displayed in coded symbols for about another second this is for service purposes only Then the display changes to normal operation System Voltage The controller adjusts itself automatically to 12 V or 24 V system voltage As soon as the voltage at the time of start up exceeds 20 0 V the controller implies a 24 V system If the battery voltage is not within the normal operation range approx 12 to 15 5V or approx 24 to 31 V at start up a status display according to the section ERROR DESCRIPTION occurs Battery Type The controller is preset to operate with lead acid batteries with liquid electrolyte If you intend to use a VRLA battery GEL type you can adjust the controller in Programming Menu 1 see back page The equalization charge is deactivated then In case of any doubts consult your dealer 31 Display Functions and Acoustic Signals LCD Display In normal operation mode the controller displays the state of charge available energy of the battery
14. ng voltage therefore it must be installed in the same room as the battery The controller warms up during operation It shall be installed on a non flammable surface only 25 REMARK Connect the controller by following the steps described below to avoid installation faults Open the terminal lid Remove the screws from the strain relief and take off the strain relief bridges 26 Mount the controller to the wall with screws that fit to the wall material Use screws with 4 to 5 mm shaft and max 9 mm head diameter no counter sink Mind that the screws have to carry also the force applied by the wiring Mind also the minimum required distance to floor and ceiling this is necessary for ventilation reasons A DIN Rail mounting plate is available as an accessory CX DR2 This allows mounting the controller on a standard 35mm DIN rail Use the screws supplied with the mounting plate to fix it to the controller Connect the wires leading to the battery with correct polarity To avoid any voltage on the wires first connect the controller then the battery Mind the recommended wire length min 30 cm to max approx 100 cm and the wire size CXN10 min 2 5 mm CXN20 min 4 mm CXN40 min 10 mm Wrong polarity will cause a permanent warning sound 27 WARNING If the battery is connected with reverse polarity the load terminals will also have the wrong pol
15. nrestricted Normal operation Unrestricted polarity Battery connected Unrestricted Unrestricted Unrestricted with wrong polarity Acoustic Warning Reverse polarity Yes not at 24V system voltage Yes if only the battery is connected Acoustic Warning Load output is protected but loads might be damaged Unrestricted CAUTION Battery Short circuit Unrestricted must be Unrestricted protected by fuse Overcunrent Controller limits ____ Controller switches current off load terminal Controller is Thermal overload electronically Controller switches protected off load terminal No connection Unrestricted Unrestricted Unrestricted Reverse current Unrestricted Overvoltage Varistor 56 V 2 3J Max 40 V Controller switches off load terminal Undervoltage Normal operation Controller switches Controller switches off load terminal off load terminal WARNING The combination of different error conditions may cause damage to the controller Always remove an error before you continue connecting the controller 40 Error Description Remedy Error conditiorl Display Reason apr ote Battery is low Load will reconnect as soon as battery is recharged Loads are not supplied F lashes Overcurrent Short circuit of loads Switch off all loads Remove short circuit Controller will switch on load automat
16. nsor CXNT CXN can measure the battery temperature and adjust the charging voltage accordingly to extend the battery life span See CXNT manual for details Programming Your CXN You enter the programming mode with a long push 2s 8s on the button The programming menu structure is described as below Menu 1 Battery type In this menu you can select the proper battery type liquid electrolyte or GEL VRLA according to your PV system to get better charge of your battery The default battery type is liquid electrolyte Menu 2 Low voltage disconnect In this menu you can set 5 different LVD modes to protect the battery from being 37 deep discharged Please see section DESCRIPTION OF FUNCTIONS for details The default low voltage disconnect LVD setting is Mode 1 Disconnect at 11 4V at nominal load current up to 11 9V at no load current Menu 3 Nightlight function type In this menu you can set the type of nightlight function or switch off the nightlight function of your CXN controller The default setting of nightlight function type is OFF Menu 4 Nightlight function evening settings When the nightlight function type is set to EVENING MORNING mode you can set the load ON hours after sunset in this menu The default load ON hours after sunset is O hr Menu 5 Nightlight function morning settings When the nightlight function type is set to EVENING MORNING mode you can set the load ON hours before sunrise in
17. voltage at the time when twilight has reached the level when the controller should switch on off This value the closest available can then be set according to the description in the programming section Programming Lock out By pushing the button for 8 sec in normal operation mode the programming lock out is activated to prevent any accidental settings change Another 8 sec push releases the lock out Optional Functions Interface and Datalogger CXI and CXCOM The controller comes with a serial interface which can be connected to a PC with an optional interface adapter CX l see interface adapter manual for details In Programming Menu 8 Serial interface BIDIRECTIONAL NO EXCESS ENERGY is also default setting the behaviour of the serial interface can be modified Remote Display CXM The CXM remote display is designed to display panel current load current and battery voltage of your PV system and status values like charging overload low 36 voltage disconnect as symbols Additional it can display several values of CXN s datalogger of the past 7 days such as Ah SOC Battery voltage morning evening This provides you more detailed information of your PV system See CXM manual for details n Programming Menu 8 Serial interface BIDIRECTIONAL NO EXCESS ENERGY is also default setting the behaviour could modified External Temperature Sensor CXNT With the optional temperature se
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