r851v step controller with integrated vernier stage
Contents
1. Two potentiometers are used to adjust the interstage delay from 5 seconds up to10 minutes 0 9 A la This delay is active in 3 ways e Minimum time delay between each step activation when the control signal rises e Minimum ON time when the step is activated ey e Minimum time delay between each step de activation when the control signal drops 125 zt 175 Vernier stage ratio e A potentiometer is used to adjust the vernier stage ratio from 100 to 200 capacity of the other on off ni stage capacity RATIO SETTING See also slave application section at the end First adjust the vernier stage ratio potentiometer This will insure a smooth capacity rise of the total load Example 1 The total unit has 100 kW divided in 10 equal stage of 10 kW If only 10 kW is used as the modulating stage then the heater would have 9 on off mechanical stage plus one modulating stage This modulating stage has the same value as all the other stage Adjust the vernier stage ratio potentiometer to 100 100 RATIO Example 2 The total unit still has 100 kW divided in 10 equal stage of 10 kW If 20 kW are used as the modulating stage then the heater would have 8 on off mechanical stage plus one modulating stage The modulating stage has twice the value as all the other stage Adjust the vernier stage ratio potentiometer to 200 e TYPE OF VERNIER STAGE SETTING The vernier stage output can be configured to operate either as a e Vdc pulsed ou2. 20 mA PA ON Vdc pulsed signal SSR L 1 Sequence of operation L 1 Sequence of operation 010 135g ane LIFO or FIFO 010 135 6 Pan LIFO or FIFO OFF LIFO Last IN First OUT OFF LIFO Last IN First OUT ON FIFO First IN First OUT VAAN ON FIFO First IN First OUT Input Signal Switch Switch 1 Switch 2 Switch 3 Switch 4 0 to 10 Vdc control signal 2 to 10 Vdc control range Off Off Off On 4 to 20 mA control signal Off Off On Off 0 to 135 Q control signal On On Off Off If a slave unit is used wire the control signal input to the master unit only 2 To 10 Vdc Or 0 To 10 Vdc Stand Alone Thermostat Power To The Thermostat Is Supplied By The R851V 0 To 135 Stand Alone Thermostat TE ey en ZaD N0 0 Ohms 0 capacit w oe 135 Ohms 100 capacity Common w 24 Vac R 0 to 10 Vdc B X output 2 To 10 Vdc Or 0 To 10 Vdc From D D C 4 To 20 mA From D D C Building Automation System Building Automation System a E v N 0 zoD5r 2 Vdc 0 capacity 4 mA 0 capacity 10 Vdc 100 capacity 20 mA 100 capacity 24 VAC POWER amp RELAY OUTPUT WIRING The wiring diagrams are for the R851V 8 models with 8 outputs The wiring for the R851V 4 is the same except that the unit only has 4 outputs Terminals Screw terminal amp connector 1 Common Screw termin
3. notice All R851V series controls are for use only as operating controls Whenever a control failure could lead to personal injury and or loss of property it becomes the responsibility of the user to add safety devices and or alarm system to protect against such catastrophic failures LIFO FIFO ADJUSTMENT The R851V series features 2 different staging sequences e LIFO LAST IN FIRST OUT CONTROL SWITCH 1 OFF FACTORY DEFAULT This is the regular mode Stage 1 will always be the first to energize and the last stage to de energize e FIFO FIRST IN FIRST OUT CONTROL SWITCH 1 ON In this mode the stages are rotated to ensure a more uniform wear of the contactors and elements For example on an increase in demand stage 1 will be energized following by stage 2 etc On a decrease in demand stage 1 will de energized first followed by stage 2 etc Please verify that if this mode is enabled the manufactured product still complies with active codes and regulations VERNIER STAGE SELECTION AND WIRING The Viconics R851V series step controller has an integrated vernier control output This output will give a precise and full modulation of the load from 0 to 100 of the total capacity of the unit If a master slave application is used always connect the vernier output of the master unit ADJUSTMENTS Functions of the units can be configured with six dip switch and 2 potentiometers Jef Interstage delay potentiometer setting
4. Innovative Control Solutions For Your Needs u ONIS R851V STEP CONTROLLER WITH INTEGRATED VERNIER STAGE e Pulsed or analog 0 to 10 Vdc vernier stage e 4or8 step models e Up to 16 stage total with a slave unit HE e Test button ie gt al sa E A DESCRIPTION SPECIFICATIONS The Viconics R851V series step controller is designed for cost effective precise modulation of multi stage control application A common application is a multi step electric duct heater An integrated vernier control output will give a precise and Operating 0 C to 80 C 32 F to 176 F Conditions 0 to 95 R H non condensing full modulation of the load from O to 100 of the total Relay outputs Pilot duty capacity 24 120 Vac 720 VA 240 Vac 690 VA FEATURES AND BENEFITS Motor load Microcomputer based design Accuracy and reliability 120 Vac 1 HP Adjustable inter stage delay Provides flexibility in 240 Vac 2 HP replacement applications Adjustable Vernier ratio Simplifies design of Vernier stage 0 to 10 Vdc 5 mA max proportional stage Vdc pulsed 6 Vdc 30 mA max Choice of pulsed or analog Permits use of SCR or lower Input 0 to 10 Vdc into 10 KQ minimum Vernier output cost SSR impedance Up to 16 stages One product family can handle all applications Power supply 24 Vac 15 10 50 60 Hz up to18 VA Choice of LIFO or FIFO Increased flexibility of FIFO Use a Class 1 properly fused or Class 2 seque
5. al amp connector 2 24 Vac Screw terminal amp connector 3 Control Signal input e tis not necessary to ground any leg of the transformer to earth with the controller card e The controller uses internally a half wave rectifier bridge On O to 10 Vdc control signal the reference of the control signal is the Common of the power supply of the SCR controller card e Use a Class 1 properly fused or Class 2 CSA or UL recognized transformer 4 STAGE APPLICATION Number of R851V 4 Control Switch stage Switch 3 Switch 4 1 Off Off 2 On Off 3 Off On 4 On On CIC FP 20 fee wv N M zado 00zZF ro 8 STAGE APPLICATION R851V 8 z i i d aa E 0 0 s0 Ei wu N MET ER AT a Number of R851V 8 Control Switch stage Switch 3 Switch 4 Switch 5 Switch 6 1 Off Off Off Off 2 On Off Off Off 3 Off On Off Off 4 On On Off Off 5 Off Off On Off 6 On Off On Off 7 Off On On Off 8 On On On Off e 12 STAGE APPLICATION R851V 8 MASTER UNIT R851V 4 SLAVE UNIT See also slave application section at the end Fim USE VERNIER OUTPUT OF MASTER UNIT IF VERNIER CONTROL IS REQUIRED A m dao i O E O aad Eth O cee PEE lols e Sie wa NWN 205 cozeroui a NN 205 v0Ozr04 Note Set all control signal INPUT dip switch to OFF on slave unit Number R851V 8 Master Unit Control Switch R851V 4 Slave Unit of stage Switch 3 Switch 4 Switch 5 Switch 6 Switch 3 S
6. ay potentiometer to the same value as the master unit e Set all control signal INPUT dip switch to OFF TEST MODE BUTTON The test mode button can be used to verify if the number of stage have been configured properly 1 Press and hold the button for 3 to 4 seconds 2 Ifa slave unit is used press amp hold the 2 units button simultaneously 3 All the selected stage will come on one after the other until all selected number of stages are all on 4 There is a delay of approximately 5 second between each step activation 5 When all selected stage are on they will stay on for approximately 30 seconds before shutting down Powering up the R851V controller while holding down the test button will by pass the interstage delay for 10 minutes During that period the unit will respond to a changing signal input very rapidly Also hold down slave test button on start up if a slave unit is used After that 10 minute period the unit will function normally with the interstage delays active Viconics Electronics Inc www viconics com 9245 Langelier Blvd St Leonard Quebec Canada H1P 3K9 sales viconics com LIT R851V E03 028 5009 REV 2
7. ncing permits even use of contactors CSA or UL recognized transformer for power Test button Quick troubleshooting supply amp relay outputs MODELS AVAILABLE UL recognized File E212649 Specifications and equipment are subject to change without prior notice The R851 V is available in 2 models e R851V 4 4 stage unit OVERRIDE TEST BUTTON e R851V 8 8 stage unit The override test button can be used to by pass the interstage If more than 8 stages are required the R851 V8 can be used as delay and bring on all stage at one time This simplifies the a master unit with another R851V as a slave unit Adding verification of configured maximum number of stages A status another unit R851V 4 or R851V 8 can bring the total step led per step will come on for each of the configured stage number up to 12 or 16 INPUT SIGNAL The R851V has four INPUT dip switch S1 to S4 to select the control signal input They are compatible with industry standard signals DIP SWITCH ADJUSTMENTS amp WIRING CONTROL INPUT aes Oe m fam mm m en eee ae eS pital dr as aaa fay a 4 Input 3 6 Number of steps selection a tan 4 Input 3 4 Number of steps selection signal selection see next pages for details Signal selection see next pages for details 0 to 10 Vdc ana 2 Vernier stage selection 0 to 10 Vdc 2 Vernier stage selection OFF 0 to 10 Vdc SCR OFF 0 to 10 Vdc SCR 4 to 20 mA an n ON Vdc pulsed signal SSR 4 to
8. tput to activate an R810 power module e Oto 10 Vdc analog output to activate an R820 SCR power controller e VERNIER STAGE WIRING Control Switch 2 On Vdc pulsed to activate R810 power modules R8 1 0 Do not wire more than six R810 power module on the vernier stage output Respect the polarity between the R851 step controller board an the R810 power modules Connect V to Connect COM to The green status LED on the master unit will cycle at the same rate as the time proportioning vernier output For more information please refer to the R810 service manual Control Switch 2 Off 0 to 10 Vdc analog output to activate R820 SCR power controller Set the R820 SCR power controller to accept a 0 to 10 Vdc control signal input Switch 1 2 amp 3 Off Switch 4 On The intensity of the green status LED on the master unit is proportional to vernier output For more information please refer to the R820 service manual R820 SCR Power Controller 2z AAA nlanla Pem 0 0o NPUT CONTROL SLAVE APPLICATION SECTION When using a unit for slave applications it is important that the proper adjustments amp setting be made to the unit for proper operation of the system The yellow LED near the vernier output connector is proportional to the vernier output of the master unit O to 5 Vdc On the slave unit e Set vernier ratio potentiometer to 100 e Set interstage del
9. witch 4 9 Off Off Off On Off Off 10 On Off Off On On Off 11 Off On Off On Off On 12 On On Off On On On The intensity of the yellow status LED on the master unit is proportional to the slave output e 16 STAGE APPLICATION R851V 8 MASTER UNIT R851V 4 SLAVE UNIT See also slave application section at the end AerOQoege OF MASTER UNIT IF VERNIER CONTROL IS REQUIRED b m m m m m eee ON ON E ON gt OC A O OS A 0 END T N M zadr 002404 ZaD VOZ O Note Set all control signal INPUT dip switch to OFF on slave unit Number R851V 8 Master Unit Control Switch R851V 8 Slave Unit Control Switch of stage Switch 3 Switch 4 Switch 5 Switch 6 Switch 3 Switch 4 Switch 5 Switch 6 9 Off Off Off On Off Off Off Off 10 On Off Off On On Off Off Off 11 Off On Off On Off On Off Off 12 On On Off On On On Off Off 13 Off Off On On Off Off On Off 14 On Off On On On Off On Off 15 Off On On On Off On On Off 16 On On On On On On On Off The intensity of the yellow status LED on the master unit is proportional to the slave output R851V DIMENSIONS amp INSTALLATION 6 6007 0 225 0 225 4325 PA O 0 o be ar zo gt 002Z O 0 225 F Install on the mounting plate on the electrical cabinet using five 6 pan head metal screw Do not over torque the screws to prevent damage to the board Specifications and equipment are subject to change without prior
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