DC32 II Series Installation and operating instructions
Contents
1. 0 will be shown press to enter the right password value and then press and The ti ji i if PEc 2 0 45 minutes release the Enter key to confirm it If the value entered does not match the stored password PSS the controller exits the programming mode 4 0 45 minutes 3 SHy showed press or 7 to scroll all the parameter codes 4 While a code is displayed press and release the Enter key to view its content adjust it by pressing or Y obie during Pi e H 5 Press and release to confirm the data after 15sec the DC32 will quit the programming mode and the data will be stored in the memory a hapa compressor or relay faults WARNING the instrument must not be reset before leaving the programming mode otherwise the new setting will be lost a ifthe Function key is pressed during the programming mode the user will exit the progr mode without saving DC32 will loose the new setting ifro1 0 ifro1 gt 0 time i cae ser atin dada any se oe if pleat i ie for at least 15 seconds and store the current data 4 20 ALARM parameters after having modified any parameter the controller must be restarted unplug and plug again The temperature alarm events are always linked to the probe 1 The alarm hysteresis is 0 4 C fixed 3 30 Keyboard locking E _ o Param Description Range Default Press and hold both the Enter key the Down key 7 for 6 second in o2. 4 30 DEFROST parameters Param Description Range Default Defrost duration timeout It is the max duration of each defrost action If ddt 0 the defrost function is disabled Defrost time scale ex tiS It changes the time scale of dPt and ddt 0 dPt hours ddt minutes 1 dPt minutes ddt seconds Defrost end temperature Only valid when dead band mode is activated Sdb gt 0 dEt During the defrost action the controller checks the temperature 2 When the evaporator reaches the dEt value the controller stops the defrost action From any start of the defrost action the controller stops the defrost after ddt time even if temperature 2 is less than dEt timeout end Defrost type ex odd Define the outputs K1 K2 actuation to perform the defrost actions When dead band mode functioning 0 switch off K1 and K2 1 switch off K1 switch on K2 2 switch on K1 and K2 When 2 stages mode functioning 0 switch off K1 and K2 1 switch off K1 no change K2 2 no change K1 switch off K2 Defrost start delay It is a delay between the time to start of the defrost action and its real beginning must be dSd lt dP ds At the power on of the controller it starts the first defrost action after dPt hours dSd minutes and the sucessive starts after d dPt If an external contact activates the defrost action if Eio 4 it starts after dSd Eid minutes d Delay to switch on the K1 not K2 after a defrost end ex Add After a defrost cycle the compre
3. C Beta 3435 25 85 q A n 4 E SH2 Sdb SHY Ptc 9900hm 25 C KTY81 2 121 o e EA a OUTPUTS 1 spst relay 250Vac 12A max resistive K1 channel 1 relay 1 21314 567 9 10 11 12 St St2 SH2 K2 on 1 spdt relay 250Vac 8A max resistive K2 channel 2 relay St2 St2 SH2 _K2on 1 spst relay 250Vac 5A max resistive optional alarm relay Figure 2 Figure 3 k2of 4 l the max const current in the common terminal 1 is 12A A 4 S 2 INDIPENDENT STAGES Kot s _ i 2 INDIPENDENT STAGES temperature probe 2 SERIAL PORT TTL level ModBus protocol RTU type 9600 baud S QO Power A V Eoy WITH 1 PROBE SEt SEt SHY K1on WITH 2 PROBES 8bit char even parity 1 bit stop X alarn supply 5 if Sdb 0 Pr2 0 a if Sdb 0 Pr2 1 SEt SEttSHY K1on DISPLAY 3 digit LED 14 mm height high intensity red 112 Example with Act 0 amp Ac2 0 Ktoff__ ________ Example with Act 0 amp Ac2 0 o i MEASURING RANGE 50 150 C 50 302 F if Ptc Power Line temperature temperature probe PE i resolution 0 1 C 0 1 F within 19 9 99 9 prona temperature probe 1 accuracy 25 C 0 5 C 1 digit 63 5 6 8 4 10 CONTROL OUTPUTS K1 K2 Parameters j j j 2 ire E 63 5 x 70 mm g Param Descrizione Limiti Default et A storage temperature 25 70 C j Secondary set point 7 l l l a l storage humidity 30 90 r H non condensing T w E When dead band operating mode it is the value for the energy s
4. aving function activated by the digital input SLo SHi C 8 C plastic casing PC ABS rear box PC frontal panel g 5 x When 2 indipendent stages operating mode Sdb 0 it is the desired temperature for the channel 2 to drive the K2 relay frontal panel IP65 if appropriate mounting gasket TTL serial S Set point Hysteresis ex HyS Hy2 Delta temperature value to avoid regulating oscillations See figures 1 2 and 3 max temperature of the switch head 60 C co por Example when Act 0 the compressor switches off at SEt and switches on at SEt SHy value pollution degree 2 ann i an Setting Sdb 0 the two indipendent stages operating mode is activated figures 2 and 3 with 1 or 2 probes controlled rated impulse voltage 2 5 KV PTI of insulating material 175 circuit board 250 Frontal dimensions 34 5 x 76 5 mm Class of protection against electric shock Il for correct install Mounting hole dim 29 x 71 mm Class of protection against voltage sourges category Il type of disconnection 1 B micro disconnection relay software class A 6 S Setting Sdb ex dEb greater than 0 the dead band operating mode is activated see figure 1 Sdb is the gap of temperature inside which there are no one control output active When dead band operating mode is active the K1 output relay is to drive a compressor and the K2 relay to drive a heater The Act and Ac2 parameters disappear fr
5. duct or circuit Italy described herein ATEX products are not designed intended or authorized to be use as components in systems or Tel 39 0434 85183 r a applications intended to support or sustain life or for any other application in which the failure of the ATEX product www atex it www betaelectronics it could create a situation where personal injury or death may occur 2 00 TECHNICAL SPECIFICATIONS Typical terminal connections See the label on top of the instrument 4 00 TWO OPERATING WAYS if Sdb gt 0 gt Dead Band or if Sdb 0 gt 2 Indipendent Stages POWER 230 Vac 10 50 60 Hz 3VA max for the right power supply diagram connection SUPPLY or 115 Vac 10 50 60 Hz 3VA max Figure 1 Output K2 on heater PE Output K1 on compressor The probe 2 can be used to or 12 Vac de 10 150mA max use only SELV power s DC 32 K1 SPST 12A 250Vac max resistive when Sdb gt 0 et ya oles sone or 9 24 Vac de use only SELV power supply Bel ery E DEAD BAND CONTROL SEt Sdb SH2 SEtSdb SEt SEt Sdb SEt Sdb SHY temperature P INPUTS 2 Ntc Ptc sensors 1 Digital In external contact max 1mA a E A is activated 2 2 2 2 probe 1 Probes types Ntc standard 10Kohm 25
6. eter list could be corrupted There is no temper output control Immediately check every parameter value save the correct value restart the DC32 Lot Not predictable All the outputs are switched off Switch off the K1 and K2 outputs relay All the output relays are switched off OFF The controller is going to switch off the outputs and display stand by mode Note setting the parameter Pr2 0 will disable the 2nd analog input in DC 32 for appliances with 1 probe Rev 30 01 2009 Cod 82300 0106 0 KEYBOARD FUNCTIONS y Beta eAlectroric Enter to activate the programming mode and to view and to confirm the new values Function 1 to show the Haccp records 2 pushed for 5 seconds to start or stop manually the defrost without waiting dSd or see LFc 1 to switch on off the controller The off mode or stand by is stored in memory 3 in programming mode to quit the parameters menu without saving the new values escape command 4 during an alarm event to switch off the optional internal buzzer and relay Up 1 to display for a few seconds the probe 2 temperature and pushed twice the probe 1 snap temperature 2 during the programming Function mode to scroll the parameters menu and to increase the value of the selected parameter Down 1 pushed together with the Enter key for 5 seconds to lock unlock the keyboard 2 during the programming mode to scroll the parameters me
7. ith different SEt point temperature values Enabling the second probe it will achieve two indipendent control channels like having two separate thermostats The DC32 has two analog inputs for temperature probes Ptc and Ntc type a digital input for an external contact two power relay outputs and optionally an alarm relay or buzzer It can perform defrost actions with varied functions verify temperature alarm conditions and store the last 3 events Haccp feature Through the TTL port an external master device can exchange data read and write DC32 registers 1 10 Installation notice The installation must be done only by specialized personnel in according to the rules in force in the country where the controllers are used The instrument is conceived for controlling and regulation not for safety function It must be installed in a place protected from extreme vibrations impact water corrosive gases and where temperature and moisture do not exceed the maximum rating levels indicated in the specifications The same directions are valid for the probe installation The probe is not waterproof it should be placed with its head upward so that drops would not penetrate into the bulb and damage the sensor Maintain the length of the electrical wires as short as possible in order to keep the noise picked by them at low level otherwise a shielded wire will be needed and the shield will be connected to the ground 1 20 ELECTRICAL WIRING We recommend to
8. larm signal management is disabled during the defrost actions no star nor stop alarm
9. n The same for the r and relay output 2 Press and release to view the Set Point value adjust it by using or 7 it is only possible values inside the SLo and SHi range Retard to switch on the output relay rot is the delay fo switch on the K1 relay from the request to activate it TO oo l roio When the probe 1 temperature requires to activate the K1 output the software starts to waiting ro1 minutes before switching 0 20 minutes OW 3 Press and release to confirm the data after 15sec the DC32 will leave programming mode and the new data will be stored in the memory on the output relay This delay is not considered when PF1 After defrost compressor waits also ro1 see also dAd A The same for the ro2 and K2 relay output 3 20 Menu Level 2 Adjust all the other OPERATING PARAMETERS os Probe 1 error output K1 mode ex CPF only for the K1 not for the K2 output If there is a probe 1 fault see par 5 00 the 1 Press the Enter key and hold it for 6 seconds The upper point will flash to indicate programming mode entering If no password is set DC32 starts to manage the K1 output relay by time and shows PF1 on display PSS 0 the code of the first variable SHy will appear go to point 3 If password is set will appear PAS request 0 K1 relay always off 1 K1 relay always on 2 K1 relay on for PE1 minutes and off for PEO minutes 2 password request Press and release the Enter key
10. nu and to decrease the value of the selected code Installation and operating instructions ae Light on gt atleast a compressor is running Flashing gt waiting for a time delay to switch on compressor Light on gt atleast a heater is switched on AW Flashing gt waiting for a time delay to switch on heater Down Enter 1 2 Light on gt output relay channel 1 2 switched on r Flashing gt waiting for a time delay to switch on the output 1 2 DC3 2 Se ri e sS the number 1 and 2 are working only during 2 stages mode functioning ata Light on gt defrost action is running Electronic dead band Flashing gt high temper probe 2 only when dead band mode and 2 stages controllers The upper left point is flashing in programming mode and is lit on if an external contact is active digital input or when the DC32 is switched off in stand by mode The numbers 1 amp 2 are NOT referred to the probe temperature showed 1 00 GENERAL DESCRIPTION AND INSTALLATION NOTICE The DC32 models are controllers designed to control refrigeration heating appliances by dead band or 2 indipendent stages functions When dead band mode it checks the main temperature probe and manages the cooling K 1 output and heating K 2 output relay in automatic way to regulate the room temperature around one desired SEt point value Whereas the 2 stages control mode is suitable to select heating or cooling mode for each of the two output relays w
11. of the alarm signal o ee 110 C aan Gait ca AtP 1 0 5 150 C temperature 1 was over ALo or AHI then AL2 min max alarm AL1 is referred to the most recent event AL3 is the oldest If present switch on the alarm relay or buzzer When the DC32 is showing the Haccp data pressing the Function key for 5 seconds will erase the alarm data stored it will show erann ORAY ALME poer on Ee COE MOT rt TOTP EFe Ue a int Pal pours woe pawar an The controller will show only data for alarms of events which have come back to normal If an alarm is running it could be ended decreasing the ALo Bam aU UM Le SP We TS De in ine alari Fane ar AL nda ssw One Arra sigrak 120 mes l y a 9 g Alarm delay after defrost After the end of any defrost the DC32 waits AdF minutes before checking any temperature alarm 180 minutes o increasing the AH value At the end of an alarm the DC32 stores the Haccp data In Its memoly Ad0 Alarm delay after de activation of the external contact digital input 7 240 minutes 0m During the defrost actions there is no alarm recording DC32 doesn t have a battery inside if power fails occurs it does not check record any data Alarm delay from the activation of the external contact The delay count starts immediately without waiting Eid 0 120 minutes Changing the temperature measure unit unt param the logged temperatures parameters values reflect unit set in the past not convert Note The a
12. oggle to stand by mode the off state is not stored in memory 6 external alarm switch off all the relays switch on the optional alarm relay or buzzer 0 60 minutes O 01 0 Temperature unit measurement 0 Celsius degree 1 Fahrenheit degree 04 changing Unt value DC32 doesn t match any parameter Rearrange temperature param values in order to adjust the control 0 C Temperature displayed 0 temperature probe 1 1 temperature probe 2 2 SEt value Pressing the Up key it is possible to display for a few seconds the temperature measured by probe 2 and then 1 Update temperature filter Different averages are performed to avoid noise spikes on the probes measurements 0 filter disabled 3 measures displayed per seconds 10 the temperature average is evaluated on the longest time span LFe Long pushing Function configuration 0 pushing for 5s the Function key start stop defrost 1 pushing for 5s the Function key toggle on off the DC32 stand by Password setting It is possible to set a password to access on the 2nd menu parameter 0 password request disabled LVS Low voltage sensing In order to improve the functioning the controller continuously verifies the power supply voltage 0 function disabled 1 short voltage drop is not detected min sensitivity 10 short voltage drop is detected max sensitivity Slave device number address It is the address of the controller in a bus network with ModBus RTU p
13. om the menu list SLo Low Set Point limit ex LoS It is the min value of SEt amp St2 parameter range The user cannot select a value lower than SLo 50 SHi 40 C High Set Point limit ex HIS It is the max value of SEt amp St2 parameter range The user cannot select a value higher than SHi SLo 150 C 110 C Only valid for 2 indipendent stages functioning when Sdb 0 REAR BOX Act is the action mode of the K1 output relay direct for cooling systems inverse for heating control ees 3 00 SETTING THE DC32 Act Ac2 0 direct action refrigeration As temperature rises over Set SHy it switches on the K1 output for a compressor nad f 1 inverse action heating As the temperature falls below Set SHy DC32 switches on the K1 output for a heater Sdb gt 0 3 10 Menu Level 1 Adjust the main SEt and secondary SET POINT desired temperature value The same for Ac2 and the output K2 relay indipendent by K1 mode See figures 2 and 3 1 Press and release the Enter key SEt is displayed The upper point will flash to indicate programming mode entering To view change St2 Anticycle retard ex Acy rA1 when the K1 output is switched off the controller waits at least rA1 minutes to switch on again cae oe i rA1 rA2 O Th forthe rA K2 rel 0 20 minutes 0m press or Y to move to St2 secondary Set Point the relay It Is also the delay for the first activation of the relay at power o
14. protect the power supply of the controller from electrical noise spikes and especially from voltage surges and drops separate the power supply of the loads compressor heaters fans from the power supply of the controller This alleviates problems related to voltage dips that can arise during the switch on of the loads that may disturb the controller s microprocessor causing unexpected resets the cables of the probes and the ones of the controller supply or the loads must be separated to reduce spikes and noise on the sensor This improves the stability of the reading and it also makes the commutation of the device more accurate 1 30 CRITICAL ENVIRONMENT For applications in heavy industrial environment these rules should be followed After having identified the source of noise spikes it is recommended to apply a line filter to the source in question of the type specifically designed to solve EMC Electromagnetic compatibility related problems Sometimes it may be sufficient an RC type filter also called asnubber connected in parallel to the external relay coils or circuit breakers An independent power supply should be used to power the device in extreme conditions ATEX Industries srl ATEX reserves the right to make changes without further notice to any products herein to improve reliability function 33078 S Vito al Tagliamento PN or design ATEX does not assume any responsibility for any improper use or application of any pro
15. rder to lock and unlock the keyboard the upper left point will flash code If the controller shows Pof it means the keyboard is locked if it shows Pon the keyboard is unlocked Alarm type values 0 ALo AHi are absolute temperature values 1 ALo AHi are temperature values relating to the SEt value also when St2 is activated Low temperature threshold alarm ex LoA If the temperature goes below this value ALo 0 4 the controller activates an When the keyboard is locked it is possible to view any parameters value but not to change them 3 40 How to show the stored alarm temperatures Haccp feature AtP 0 50 AHi 1 alarm signal on the display and starts recording the minimum temperature and the duration of the alarm Haccp 5 40 C The DC32 stores the last 3 temperature alarm events the temperature of probe 1 has been lower than ALo or higher than AHi if aie switch on i am relay or aie j ae AtP 1 50 0 5 C when the controller is showing the temperature i e not in programming mode press and release the Function key l High temperature threshold alarm ex HiA If the temperature goes up over this limit value AHi 0 4 the controller activates jin ALo 1 150 it will show HcP Haccp and if any alarm data are stored it will show AL1 min max temperature reached and for how long minutes the i an alarm signal on the display and starts recording the max temperature and the duration
16. rotocol nAd 0 serial port is disabled When a key is pushed or in programming mode DC32 does not always answer to the serial port after having changed this value the DC32 must be restarted utd 5 00 Troubleshooting The measured temperature of probe 1 only Probe 1 is higher than the AHi 0 4 Mee carta aie sides parameter value If AtP 1 the temperature is higher than SEt AHi 0 4 The Sia ere fo an alanda haccp The outputs don t change The measured temperature of probe 1 is Lower than the ALo 0 4 parameter value If Switch on the optional relay output or buzzer Pay howls eME Benet Mam SE AENA The controller starts to save the alarm data haccp SES oe All the outputs relay are switched off Extern alarm When Eio 6 and the external contact is active Switch on the optional relay output or buzzer The output K1 activation is according the PEc parameter The probe input line 1 is opened disconnected or short circuited K2 output swith off if dead band or 2 stages with 1 probe The measured temperature is out of the range functioning Switch on the optional relay output or buzzer The probe input line 2 is opened disconnected or short circuited K2 output swith off if 2 stages with 2 probes functioning The measured temperature is out of the range Switch on the optional relay output or buzzer PrF The probe input line 1 2 is opened or short circuited See PF1 PF2 output Memory error The param
17. ssor is stopped to assure 3 ie 0 120 minutes Om dripping of possible water still present in the evaporator Displayed during the defrost action also as per tdi value see the tdi parameter 0 probe temperature at the defrost start 1 the message dEF 2 the SEt St2 value 3 the real temperature probe When 0 1 2 and dead band mode or 2 stages functioning with a cooling channel showed the value still shown on the display until the controller will have reached again the Set Point value When dead band functioning by the probe 1 the DC32 checks and regulate the room temperature by the probe 2 if enabled Pr2 1 DC32 controls the defrost end Or setting i e dEt 100 and tdi 1 by the probe 2 it is possible show a different temperature measured in a particular room point When 2 stages functioning the defrost actions occurs always at fixed period dPt and duration ddt if probe 2 enabled it will control the output K2 relay dA 4 40 Various parameters Description External contact digital input operation ex dio Negative value digital input signal is active if external contact is closed Positive value dig input is active if contact is opened Eio 0 disabled 1 not allowed 2 door open switch off the output relay K1 and K2 3 St2 is the desired temperature instead of SEt only valid when dead band functioning 4 start defrost for another defrost start command de activate and activate again the ext contact 5 t
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