NWUPCM-1B Users Manual
Contents
1. Q WMd 8 SP WMd L 1 WOd MN x o sO Male ae lt lt Jels E 935 z Com IC a5 jejak SINANIONYAWOS y pn S CR w SI w LI WOZ b AOL an s ema wajan a Fi ol ei Fi ZT ala po Ol e 5 BI Til e Fe rR si slo ei SI E 5 N o E L YN amod 5 S BO S 3 3 A lk ela OCH off 30 NO NYNL YOS HIdOYd HOS Car YIBGNNS WNYILXI tf ava FINOOW YOS OVE OL HOVE D ij tma 3 S n A b L WOIJNMN H Water a SA Enpe i lt dees e 2 CR al oi 3 S IER E SINaNIaNvWWOD dark ki Ts p vuoz noro 8 leu a 8 DU a de del 4 g N fl LN3mod bi Or mel Ss A GI AE e aC VI Wb JO NO NUNL HIS YadOUd HOH GB3YIND JA YIGGNNS WNYILXI ma 5 A ee A gt Lian Jak oT e FTINAON YOS OVE OL HOVE 1 e D ilj ua ze IS o li bs L MDANMN 3 L ae SN al az SLNdNIGNYWWOD y LA e younn E e zl vuoz tg 8 B 1 ke o Su NINaMOd Vd 3 H H JO NO NHN HOS HadONd HOS G3YINDSY YIBBNNS WNYSLXS mn l d a e 3 wa e avol INGON Yos HOVE OL YOYA Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 11 WIRING DIAGRAM 3 PHASE INSIDE DELTA CONNECTION SCR2. b H WMd yH 8 A w IERCH L E WMd ri melo 4 dess t CES e 8 Oft De CR CH SANANI ONYWWOD y 2 la MA li Fi e oD sp waer noro os g H ei Ku S L H e Eh si dila le 3 as 8 Ziel E d D SI YN 3moa 5 s e a ovArz 2 gis ai 8 VA lil 8 8 Sa aC IC LO i A S PEN ia 2 3 Be D Q i WMd 8 i WMd n kg ce ieee L gt am Ir En e bal jejak SINdNIGNYWWOD I MA li 8 91 Ou SIE vuoz noo os o E P e e tt E D dal B se H N o Elen umoa e kai EG si ZS A lip SCC i LOAD D i WMd 516 S LO 2 H ma lgl 4 PBE A ase al Q ie ele SINdNIGNYAWOD y 6 ot l l a vuoz noo Et 8 o SE L Sef gt Z a bg soal 2 Or W NI 43MOd wave dei ti oi aCe l n OW AAN Copyrighi 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 9 WIRING DIAGRAM 3 PHASE 4 WIRE Y CONNECTION SSR Q i WMd el 8 A n Je 1 BONN w sO lt jel IS SS e es ss Ow JA Ve a 3 3 E SINaNIANVWWOD y TE LAS E ER Q 9 gi vwoz b AOL O LE w SIS 8 ba Ft W ak EK
3. FO li BD e a i WMd E WNIGNMN Las lt hio WK an o 5 xi L lt jejek ga cs H a DS HE SANANI GNYWWOO aa e H To E fe A S Pe HES sl Ier vuoz moto 8 Si li g 8 So e s Ei oo fi DA R S STI o D D sal 8 2 Za z H E 2 cis D FEIL Namoa o SIB LI 3 SIS bd D 5 ma 3 A 310 e 5 8 F e a acs li 440 NO NHN L YIS Y3dOUd YO 3 OBYINOZY YIGANNS Ten SEL FANON HOS HOVE OL yowa L3 S e m e O l l WMd 16 Q leh wd D RI Ad Hs 5 Cm je L dees E z CE WE elo je e SINANIGNVIWOD y LI man Te sf E vuoz moro 8 li E Ka 5 o Fh a a o al O slo R D lN amoa e Gi E mel EA _ 9 FOGE ji 440 NO NHN L YIS YIdOYd HOS ONO VERDE TL 2 COn HOS XOY OL HOVE L2 amp 2 D e LOAD Q li WMd 3 8 ai WMd KA D R IW al 5 Com we i lt SEs e A IER ee lis 3 e SLNdN
4. cc cccceeeeeeeeceeeeeeeeeeeeeaeeeeeee sents se ANANA seoooseanossasoosssooosanonoe 8 4 7 1 Line Voltage Compensation Nominal Adjustment cceccceeeceeeeeeeceeeeeseaeeeeeeeeeeeeeseaeeesaaeeseneeeeaees 9 4 8 Power EM sasa koke saa aa apah e ao keep ake saa a t ap ak ae da aa ag Na dad be Lake DOL venn a a a aaa anaa a a ae kako epe 9 4 8 1 Power Limit Adjustment Procedure AA 9 4 9 Configuration DipSwitCh asas sar sada sia aa dipan aa aa njan nek a na Nan dag apa nag naa ale ap aaa aaa ag ae naa NA akng naa aa naas ah 9 4 10 SSR Drive Output NWUPCM 1B GP 11 4 11 Output LED asian nasa ana aa gae aka aa Na Ka ed aa a ag ah ah dadana a Na ndak Ia aaa a gale an aja TE Ha Na a ag a saa a aaa a and aja 11 4 12 Three Phase Operation ccccceccceccseceeseeeeeeeceeeeesaeeseaeeceeeeeceaeeeeaaeseaeeseeeeeeaaeeseaaessneeseeessaeseeaaesseneesas 11 4 13 Wiring Multiple Units in Single Phase or Three Phase Applications s0saeenan anan en anan an anana anan an anan 11 4 13 1 Connecting Power A Commands In Parallel 12 5 Electrical Specifications asasaran na an Gek Aga ap kaka dan patties Eka ak adan a kan kk edd kn aka Ge ka ik ee ad PEZE kn DY a An 12 D Mechanical Dimensions using Aga a anaa ANETA aga aa daa ngina aaa aga wi asin ia aaa 13 7 WIRING DIAGRAM SINGLE PHASE SSR OR GCH raaa aana eaaa anaa aaa anana anana anan ananeng anaa nenen anana 14 8 WIRING DIAGRAM 3 INSIDE DELTA CONNECTION GP 15 9 WIRING
5. a 6 St 3 218 e slo 2 Ji c a v O 4 ah NI SACH o SIS LI wave EI fe ki a la E Q sl La j l 818 CO 9 li D g D be 8 A D avol FO li WMd S li Wad ge a ik Le IE s O sfa IER LS 4 ee si 3 8 S SANANI ONYWWOD y H CH ge ev Li Je m H A uge ADL 0 Z LJ 318 PL el li 2 ZE E EE aA a WM avan si Ee li aC CS jij UI a LI J e SIALO avan e e FO H WMd al D k IG IES sl Q je E SLNdNIGNVWWOD y LI os e oT 7 ur A01 0 8 a S E See el D dal j ab leif LN 3M0a BCE al Ez A i CCC j OOD 5 oue 9 S D avor Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 10 WIRING DIAGRAM 3 PHASE 4 WIRE Y CONNECTION SCR
6. Rev 2 2 12 13 NWUPCM 1B SERIES USER MANUAL SCR POWER CONTROL DRIVER BOARD ZERO CROSS BURST FIRED COPYRIGHT 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual TABLE OF CONTENTS BE ele ue Re 2 GR le 3 3 Installation Safety IMfOrMattOn EEN 3 3 1 Mounting INSTTUCTIONS EE 4 3 2 Electrical GONN CHUONS EE 4 3 3 SCR Output Snubbers and Transient Protection ccccccceeeeeseeeceeceeeeeeeceaeeeeaaeeseneeseeeesaeeesaeeseeeessaees 4 3 3 1 ee d ele EE A 3 3 2 Wl ER e E 4 3 3 3 Sn bber SIZING DEET 4 3 3 4 lee DATE A 3 4 Bil e KEE 5 anagara nasa adagang wa aik ang enn ag ap ada aa penk ag a A pese aa aka de AAA dag ah karajaan ag A TAA aga nak ees 4 4 Operati EE 5 4 1 Neie CN 5 4 2 2AN POWER FUSING E 5 4 3 Command IN LEET 5 4 4 PWM Command Input eee aeeeeaeeseneeeceaeeecaaeeeaeesaeeeeaaeegeaaeseeeeecaeseseaesseaeeseeeescaeeseaeseeneeeaas 5 4 4 1 PWM Ut kan aan arka baa ka pi knn deeg n asa kl evened een kn RAP aa DO AKUN kn Fa RD B kn RAPO ma pu ana da aaa de pw dik ba a 5 4 4 2 Input Faiksaf Prot CtON sasaka kuna kaa ATEGES aga aaa aaa SA pe d a kw Apot kan Ka RAS pd aa AAN agagah kaa 5 4 5 GY CIS TIMES ET 5 4 6 Cycle Times 266mS Selection Fast Synchronous Burst Eirimg anaa anan aan anna 7 4 6 1 Fast Synchronous Burst Firing Mode 7 4 6 2 Fast Synchronous Burst Firing Advantages cccccceeeeeeeeeeeeeeeeeeeeeceaeeesaaeeeeeeeseeeesaeeesaeeseneeesaees 8 4 7 Line Voltage Compensation LVC Option
7. graph will allow you to verify the SSR s compatibility with the NWUPCM 1 over wide input voltage variations SSR DRIVE CURRENT mADC 0 5 10 15 20 SSR INPUT VOLTAGE DROP VDC NWUPCM 1 s Output Drive Current vs SSR Input Voltage Drop 4 11 Output LED The NWUPCM 1 s RED output LED will turn on when the output is on the LED should can used as a rough indication of SSR SCR Drive and actual power output 4 12 Three Phase Operation Three NWUPCM 1s can be used to control three poles of a three phase load for inside delta or grounded WYE configurations The Module should be wired as shown in the wiring diagrams 4 13 Wiring Multiple Units in Single Phase or Three Phase Applications If more than one NWUPCM 1 is to be used from a non isolated or common command signals 1 A common power supply or transformer can be shared If the input selected is 0 10V or 0 5V the inputs should be wired in parallel 2 If multiple units must be powered from one power transformer and 4 20mA input is selected one module should be set for 4 20mA and the remaining modules should be set for 1 5V and wired in parallel 3 If the command is 4 20mA and the command inputs are to be wired in series a separate power transformer or supply for each module is required to isolate the inputs Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 4 13 1 Connecting Power amp Commands In Parallel When multiple NWUPCM 1 power inputs an
8. interface with a PLC or PC DAQ 4 4 2 Input Fail safe Protection If the signal sent to the NWUPCM 1 s command input should become electrically open the control output will be forced to an off state 4 5 Cycle Times The cycle time refers to the total time between an on and off cycle Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual a Li a Q lt O onl The NWUPCM 1B has 4 available cycle times settable via the dipswitches The cycle times are specified below in of cycles and can be correlated to their respective times using the table below for both 50 and 60 Hz Line frequencies Dip Dip of Cycle Cycle Resolution Switch 1 Switch 3 cycles Time Time of FS 60Hz 50Hz OFF OFF 16 266mS 320mS 1 ON OFF 60 1S 1 28 1 66 OFF ON 600 10S 12S 0 166 ON ON 6000 100S 120S 0 0166 Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual Synchronous Firing Method When burst firing AC with conventional PWM there is a tradeoff between resolution and cycle time Generally the cycle time should be chosen based on the mass of the load to be controlled the larger the load mass the longer the cycle time can be For the best possible resolution its standard practice to choose the longest cycle time that can be used without causing process ripple Longer cycle times generally provide greater control resolution but the Fast Synchronous Burst sett
9. pulse width per pulse rise time of 100nS NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 6 Mechanical Dimensions 1 17 NWUPCM 1 MODULE MOUNTED IN SNAP TRACK Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 7 WIRING DIAGRAM SINGLE PHASE SSR OR SCR WIRING FOR MODELS NWUPCM 1P SCR PHASE ANGLE NWUPCM 1B SCR BURST EXTERNAL SNUBBER REQUIRED FOR PROPER SCR TURN ON OFF Au EXTERNAL LINE SYNCH INPUT e ka foo Te iu e ev eo MODULE DIMENSIONS 3 00 X 2 50 X 1 25 LEDI D PWR D OUT LED2 NWUPCM 1 NOMINAL OUTPUT ADJUST VOLTAGE LIMIT ADJUST NOMNL V LIMIT D Wei Hi AKO H 3 See e OPTIONAL SSR DRIVE MODELS sere sse zav 5v vin OPTICALLY ISOLATED A PWM INPUT NWUPCM 1P SSR PHASE ANGLE NWUPCM 1B SSR BURST p PLC INTERFACE 24VAC POWER IN A A 0 10V 4 20mA D COMMAND INPUTS y POTENTIOMETER NWUPCM 1 SINGLE PHASE WIRING Revision 1 DC 070109 Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 8 WIRING DIAGRAM 3 INSIDE DELTA CONNECTION SSR
10. 5 The line synchronization for phase angle and certain modes of burst firing has an input voltage range of 100 to 600VAC 30 to 90Hz 4 2 24V Power Fusing Fusing may be accomplished by fusing each module separately or fusing groups of the modules with either primary or secondary fusing The current draw of each NWUPCM 1 is 100mA max 4 3 Command Input The NWUPCM 1 can accept 4 20mA 0 10V 0 5V and Potentiometer and PWM inputs All analog command inputs are not isolated from the 24V power Input The type of command input can be configured via the dipswitch The default setting is O 5V potentiometer The PWM digital command input PLC Interface is optically isolated from the power supply When wiring multiple NWUPCM 1 s together follow the guidelines in the Wiring Multiple NWUPCM 1s section Any leg of the command input can tolerate shorts to the OV input Connecting the 24V power to the command input may cause damage to the unit 4 4 PWM Command Input The NWUPCM 1 PWM Command input is designed to accept a signal from a PLC ora process temperature controllers SSR drive output This logic signal is used to generate a command setpoint 4 4 1 PWM Input The NWUPCM 1 accepts PWM signals from 500Hz 15KHz and logic voltages of 5VDC non isolated command input or 24VDC optically isolated PWM input When using the optically isolated PWM input the PWM Dip Switch 6 must be set to ON The PWM input provides a low cost way to
11. DIAGRAM 3 PHASE 4 WIRE Y CONNECTION GG 16 10 WIRING DIAGRAM 3 PHASE 4 WIRE Y CONNECTION ICH 17 11 WIRING DIAGRAM 3 PHASE INSIDE DELTA CONNECTION CH 18 12 Contact INfO0rMAON EE 19 1 Ordering Codes Ordering Codes NWUPCM 1B Power Control Modul Single Pole Burst Fire SCR or SSR Part Description NWUPCM 1P SSR Phase Angle Control Module SSR DRIVE see NWUPCM 1P User Manual NWUPCM 1P SCR Phase Angle Control Module SCR GATE DRIVE see NWUPCM 1P User Manual NWUPCM 1B SSR Burst Firing Control Module SSR DRIVE NWUPCM 1B SCR Burst Firing Control Module SCR GATE DRIVE NWUPCM 1B SSR LVC Burst Firing Control Module SSR DRIVE NWUPCM 1B SCR LVC Burst Firing Control Module SCR GATE DRIVE Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 2 Description The NWUPCM 1 is a phase angle burst fire control module designed for use with Solid State Relays or high power back to back SCR modules The power delivered to the load is proportional to the command input signal Features e Zero Cross Firing for low EMI Fast Sychronous Burst Algorithm provides true linear power at fast cycle times Small 3 0 x2 5 module mounts in a snap track or a dinrail Command input accepts 4 20mA 0 10V 0 5V Pot PWM Wide frequency operation 30 to 90Hz Adjustable Power Limit Drives multiple solid state relays Drives SCR gates directly Single phase and three phase control 3 Installation Safe
12. IGNYWWOO y San IR youn b Je a O f r woen novo 3 8 il egi Si D PERSI 8 D ll N umoa E OWAPZ Q SC C ORE 340 NO NYIN L YIS YIdOYd YON OD HES TWNYSLXS EE ANA on 2S gana AN ee ji 5 or ee BIGONSOSXOVEOL HOVE Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 12 Contact Information NuWave Technologies Inc 866 379 3597 www nuwaveproducts com Copyright 2013 NUWAVE TECHNOLOGIES INC
13. d commands are wired in parallel all of the OV terminals must be connected together follows Power Command OV OV OV gt OV OV OV gt 24V 24V 24V gt IN IN IN gt No crossing of the power input feed or command signal is permitted If for some reason the power should become crossed it will cause a direct short in the system If properly fused the fuse will blow and the NWUPCM 1 will not be damaged If the command inputs are wired improperly damage to the NWUPCM 1 can result 5 Electrical Specifications Command Inputs Input Impedance SSR Control Output Response Time PWM Input Frequency PWM Input Level Output Linearity External Potentiometer Res Line Voltage Comp Range Power Limit Range Ambient Temperature Range Power Supply Line Frequency Range Line Voltage Range SCR Firing SCR Gate Drive Characteristics Copyright 2013 4 20mA 0 10V 0 5V Pot PWM 10K Q 0 10V 250Q 4 20mA 100KQ 0 5V SSR Drive DC pulse nominally 10V at 20mA lt 50mS 500Hz 15KHz 5 VDC non isolated or 24VDC isolated 2 10KQ 25KQ 15 15 up to 100 output 10 100 of max load power 0 to 50 C 24VAC DC 10 10 lt 100mA Current Draw 30 to 90Hz 100 600VAC External MOV must be installed across SCRs to limit peak voltages to 850VDC AC Zero Cross Fired 16KHz Burst for 2mS every half cycle Initial pulse peak current of 600mA maintain pulses 300mA 10uS
14. ge Suppressors are both used on TRIACS SCRs to clamp voltage spikes that can occur across the devices and damage them Snubbers are not a substitute for MOVs TVSs and vice versa Snubbers and MOVs TVs should be used together to get reliable performance and long life from the SCR TRIAC application External MOVs must be installed across the SCRs to limit peak voltages accepted by the NWUPCM to 850VDC 3 4 Limited Warranty NuWave Technologies Inc warrant this product to be free from defect in workmanship and materials for a period of two 2 years from the date of purchase 1 Should unit malfunction return it to the factory If defective it will be repaired or replaced at no charge 2 There are no user serviceable parts on this unit This warranty is void if the unit shows evidence of being tampered with or subjected to excessive heat moisture corrosion or other misuse misapplication 3 Components which wear or damage with misuse are excluded e g relays Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 4 NuWave Technologies Inc shall not be responsible for any damage or losses however caused which may be experienced as a result of the installation or use of this product NuWave Technologies Inc liability for any breach of this agreement shall not exceed the purchase price paid E amp O E 4 Operation 4 1 Power Supply The NWUPCM 1 power supply requirement is 24V AC 10 47 63Hz OR 24VDC 15
15. hen just turn the pot CW until the desired maximum output Power is achieved For this feature to work as a true max limit it is important that the Line Voltage Compensation be enabled this is the OFF position of Switch 1 If the line voltage compensation is set to OFF or not present in the ordering code the max limit will act as a percentage of output limit and the absolute max limit will change with line voltage 4 9 Configuration Dipswitch The configuration dipswitch is used for setting up the command input and Cycle Times Using a pen point gently push the switch up for on and down for off according to the setup outlined in the table below Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual Command Input 2 4 5 6 0 5V Default OFF OFF OFF OFF Potentiometer OFF OFF OFF OFF 0 10V OFF ON OFF OFF 4 20mA ON OFF ON OFF 1 5V ON OFF OFF OFF 2 10V ON ON OFF OFF PWM isolated input OFF OFF OFF ON Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 4 10 SSR Drive Output NWUPCM 1B SSR The NWUPCM 1 s SSR output drive is a DC pulsed current limited 10V 15mA nominal drive signal This is more than enough current for driving most 3 32V standard SSRs however it is still important to review the data sheet for the SSR you would like to use for compatibility with the NWUPCM 1 s output drive The control output can tolerate a momentary direct short The following
16. ing provides excellent resolution at a fast cycle time 4 6 Cycle Times 266mS Selection Fast Synchronous Burst Firing When the NWUPCM 1B cycle time is set to 266mS 320mS 50Hz the Fast Synchronous Burst Firing mode is turned on The cycle time becomes longer near zero and full power levels to provide improved control resolution For Example since the NWUPCM 1B generally modulates 16 AC cycles the lower limit in power that will maintain the cycle time is 1 16 or 6 25 The NWUPCM 1B will use increased off periods below 6 25 power and above 94 75 power 4 6 1 Fast Synchronous Burst Firing Mode As shown below the NWUPCM 1B s Fast Synchronous Burst Firing mode selectively fires fractional numbers of cycles Since pulse width modulation alone would limit the resolution to 16 steps or 6 25 when modulating 16 AC cycles a proprietary algorithm is employed to provide improved resolution of 0 5 1 In this firing mode the cycle time is varied as well as the on time To select the Fast Synchronous Burst Firing Mode set Diswitches 1 and 3 to the off position 25 power 266mS Cycle Time 33 power 200mS Cycle Time 35 7 power Variable Cycle Time 50 power 266mS Cycle Time 75 power 266mS Cycle Time Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 4 6 2 Fast Synchronous Burst Firing Advantages The two plots below are actual data for a 425 degF capable 10KW resistive heater ramped from 0 100
17. power over two hours The first plot shows straight 16 cycle 266mS cycle time PWM Note the nonlinearity humps due to poor resolution The second plot shows the linearity improvement with the Fast Synchronous Burst Any visible overall curvature is a normal heater characteristic xo J mo 4 pa T T T T T re 6000 tv 8200 t8 s000 18 8200 re t000 mn he Fast PWM of zero cross fired loads can result in poor linearity resolution above tao000 tasa00 tae000 tataoo taso00 dm he NuWave Fast Synchronous Burst algorithm results in excellent linearity resolution above 4 7 Line Voltage Compensation LVC Option The NWUPCM 1 s line voltage compensation keeps the power constant on the load as the line voltage changes The line voltage is measured via the 24V power applied to the NWUPCM 1 module To use the Line Voltage Compensation feature properly a 24VAC power transformer should be fed from the same mains as the load circuit to be controlled as per the wiring diagrams at the end of this document Line Voltage Compensation can be enabled or disabled using the configuration dipswitch The default setting is enabled Switch 1 is OFF To disable the Line Voltage Compensation set switch 1 to the ON position Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual On the NWUPCM 1B Line Voltage compensation can be ordered by adding LVC to the suffix of the part When line voltage compen
18. sation is specified only the fast synchronous burst cycle time is available the dipswitch setting of cycle times is disabled With a 10 drop in line voltage NWUPCM 1 load power drops less than 2 120V IKW 14 4 Ohm Load Without Line Voltage Compensation NWUPCM 1 Line Voltage Compensation 120VAC 120VAC 108VAC S zt 10 108VAC 10 MAINS VOLTAGE MAINS VOLTAGE Ia a a kaka aa b Ia LOAD POWER LOAD POWER 4 7 1 Line Voltage Compensation Nominal Adjustment The nominal adjustment pot sets the nominal level of output for the current line voltage being measured via the 24VAC input 4 8 Power Limit The Power Limit feature is used in conjunction with the Line Voltage Compensation feature to limit the actual voltage delivered to the load The Power Limit is adjustable via a potentiometer located just below the input terminal block For this feature to work properly Line Voltage Compensation must be turned on and the power transformer for the NWUPCM 1 must be connected to the same mains as the load power is connected to This feature can be used without Line Voltage Compensation and will simply clip the command signal to a set level 4 8 1 Power Limit Adjustment Procedure The Power Limit is adjustable from 10 to 100 of the max power Setting the Power Limit potentiometer half way corresponds to a Power limit of approximately 55 With the command input set to approximately 100 on startup turn the pot fully CCW T
19. ts in a 3 0 snap track and can be installed on a dinrail 3 2 Electrical Connections See the WIRING DIAGRAMS at the end of this document Make sure the module ordered is the correct module for the application before wiring Before wiring the module all Dip Switch settings for the command input and special features should be setup properly per the Dipswitch Configuration Section 3 3 SCR Output Snubbers and Transient Protection 3 3 1 dv dt Problems When voltage transients occur on the mains supply or load of an SCR TRIAC it can cause the device to turn on unexpectedly due to the fast rate of rise of voltage dv dt This can result in false firing and half cycling of the load An R C snubber circuit will help to limit the dv dt seen by the device and will produce more reliable firing 3 3 2 Snubber Design Although most designers use an empirical approach to solving the aforementioned issues with snubbers a number of great articles have been published on the mathematical basis for calculating snubber circuit values 3 3 3 Snubber Sizing When an SCR TRIAC using an R C snubber turns on the capacitor is discharged through the resistor into the device resulting in high peak currents It is critically important when sizing your snubber to make sure that the resistor value does not become so low that the ratings of the SCR TRIAC are exceeded when the capacitor is discharged 3 3 4 MOVs and TVSs Metal Oxide Varistors and Transient Volta
20. ty Information Responsibility for determining suitability for use in any application equipment lies solely on the purchaser OEM and end user Suitability for use in your application is determined by applicable standards such as UL cUL and CE and the completed system involving this component should be tested to those standards WARNING FIRE HAZARD Even quality electronic components CAN FAIL KEEPING FULL POWER ON Provide a SEPARATE redundant OVER TEMPERATURE SHUTDOWN DEVICE to switch the power off if safe temperatures are exceeded WARNING HIGH VOLTAGE This control module has high voltage on it This control must be installed in a GROUNDED enclosure by a qualified electrician in accordance with applicable local and national codes including NEC and other applicable codes Provide a safety interlock on the door to remove power before gaining access to the device The NWUPCM 1 contains fragile components that if damaged can cause improper operation failure or fire While all units are inspected and tested at the factory damage can occur during shipping or installation Before applying power inspect each module for damage paying specific attention to the pulse transformer drive coil If there are any abrasions or scratches on the coil wires DO NOT APPLY POWER The unit should be sent back to the factory for repair Copyright 2013 NUWAVE TECHNOLOGIES INC NWUPCM 1B User Manual 3 1 Mounting Instructions The NWUPCM 1 moun
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