ZIEHL-ABEGG ZETADYN 1DV Series Скачать руководство пользователя страница 64

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A9 HOTLINE-NOTIC

Please check.:

Tel.: +49 (0) 79 40-16-308

Fax: +49 (0) 79 40-16-2 00

Location:

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Controller-Type:

ZETADYN 1DV .................................

Fert.-Nr

.: ......................................... ( see Controller data plate)

State of the

O New building

installation

O Renovation/Rebuilding

O Installation already working without troubles since..........................
O Commissioning - Assembly operation
O Commissioning - Automatic operation

Installation type

O Passenger elevator

O Gear transmission .........................

O Freight elevator

O Lifting height about ............ m

O Lifting gear

O Elevator cage in the basement

O Running gear

Error no.

........................................................................

Error

........................................................................

Error/Problem occurs

O when switching the supply voltage on
O at start-up
O when accelerating
O in case of constant run
O when decelerating
O at stopping

Error/Problem occurs

O at both directions
O only at Empty DOWN
O only at Empty UP

O Error is reproducible
O Error is only sporadic

............................................................................................................

Encoder

O ET 3F-64

O ET 3R-1024

O others............................

Motorno.

..............................................................................................

Manufactor of the PLC:

...............................................................................

Name:

...............................................................................

Telefon:

............................................

Telefax:

...........................................

Содержание ZETADYN 1DV Series

Страница 1: ...ZETADYN 1DV Control System for Elevators High bay Storage and Retrieval Systems Cranes and Conveyors System Description ASK8 T E0197 ZIEHL ABEGG ZETADYN 1DV P ZETADYN 1DV ZIEHL ABEGG ...

Страница 2: ...http www bzxindaxin com http www gk world com 全球独家推出全覆盖型省配线解决方案 ...

Страница 3: ...http www bzxindaxin com http www gk world com ...

Страница 4: ...http www bzxindaxin com http www gk world com ...

Страница 5: ...http www bzxindaxin com http www gk world com ...

Страница 6: ......

Страница 7: ...ntrol Commissioning Service of the ZETADYN 1DV controller The Appendix contains suggested a wiring diagram and a setting data card The information contained within this documentation describes the features of our products without guaranteeing the operation We reserve the right to introduce changes without notice It is particularly important that you observe the following for your own safety Inform...

Страница 8: ...over all aspects of safety Notes The information on processes and sections of the circuitry contained in this documentation must be regarded as such without further implications Their adaptation to other applications must be investigated ZIEHL ABEGG does not guarantee their suitability in such circumstances The assemblies comprise components which may be electro statically endangered The body of t...

Страница 9: ...ration Arch travel 17 3 2 4 Time based deceleration 18 3 2 5 Distance corrected deceleration 18 3 2 6 Normal slow down 19 3 2 7 Quick stop 19 3 2 8 Readjustment 20 3 2 9 Direction reversal 20 3 2 10 Short travel 21 3 2 11 Troubles 22 3 3 To ensure safe operation of the controller 23 4 Operation and settings 24 4 1 Operating through keyboard and LCD display 24 4 2 Remote operation with PC and ZETAM...

Страница 10: ... 5 4 Adjustment 42 5 5 Final of setting up 44 6 Service 45 6 1 Maintenance 45 6 2 Troubleshooting 45 6 3 Repair 45 see appendix A9 APPENDIX A1 Technical data A2 Denotation of controller types A3 Dimension sheet A4 Errorlist A5 Error tracing plan A6 Accessories A7 Changes and new functions A8 Schematic diagram A9 HOTLINE NOTIC A10 Setting data card ...

Страница 11: ...in control system Fully digital 4 quadrant motor speed control is accomplished by lowering the voltage at constant frequency The whole drive cycle is controlled from start to stop Features of the digital ZIEHL ABEGG drive control system accurate control response with good dynamics and a high positioning accuracy simple to commission and operate comprehensive diagnostic system and data protection f...

Страница 12: ...e accessories 3 Regulation All programs are run at regulated speeds and independent of the load The regulating control system can be used for speeds up to 3 5 m s The regulating range up to 1 100 allows a high degree of positioning accuracy 4 Drive A high degree of stability of a drive at low load torques can only be achieved by continuous transition of drive and braking conditions ZIEHL ABEGG asy...

Страница 13: ... without out of balance and clearance Mechanical weaknesses cannot be improved by a control but can possibly make a controlled operation impossible Controllerselection The rated current of the controller has to be higher or equal to the rated current of the high speed motor winding Installation of a encoder Provided that no sleeve shaft encoder e g Ziehl Abegg ET3R 1024 can be installed there are ...

Страница 14: ...ce are flush fitted in the front panel All connection terminals are not covered so that it is not necessary to remove the front plate Figure 2 1 Controller ZETADYN 1DV 2 2 Installing the controller For the ambiance of the device the conditions mentioned in appendix A1 Technical Data are valid Mount the controller in switchgear cabinets vertically with the terminals at the bottom Dimensions of the ...

Страница 15: ...otected F1 3 by means of slow acting fuses to suit the rated current L1 L2 L3 Connection of the supply voltage of the controller board As power safety time lag fuses F4 6 rated current 1A are to be used 11 12 Connection of the cooling fan Voltage AC 230V 50 60 Hz In case of devices starting with a rated current of 80A an additional fan for cooling the power stage is incorporated The fan is switche...

Страница 16: ... the brake without delay via this contact P1 P2 PTC thermistor Connecting PTC thermistor in accordance with DIN 44 081 for monitoring the motor temperature If the monitoring is not to be effected via the control device a jumper has to be installed between these two terminals The maximum permissible test voltage for the PTC thermistor is 2 5V Take care when using electrical continuity testing equip...

Страница 17: ...diate speed V3 Travel speed VZ Readjustment speed ZE1 Additional speed V_ZE1 ZE2 Additional speed V_ZE2 ZE3 Additional speed V_ZE3 These inputs are provided for triggering various functions in the controller The adjustment is effected in the menu INTERFACES The additional speeds V_ZE1 V_ZE2 and V_ZE3 of the same name are selected by the manufacturer Preferably these speeds are to be used for inspe...

Страница 18: ...K2 Special contact 2 Contact K21 K22 is closed when the rated speed is exceeded by 10 SK3 Special contact 3 Contact K34 K31 is open when the motor temperature control triggers off RB Controller active When closing the contact RB1 RB2 the control is to switch the main contactor K0 without delay MB Spring loaded safety brake When closing the contact MB1 MB2 the control is to switch the spring loaded...

Страница 19: ...3 are available which are not regulated depending on the path Output Controller active RB With the output RB the control device switches the main contactor to the currentless state Output Mechanical brake MB With the output MB the control device switches the mechanical stopping brake Monitoring functions Checking the input speed 0 3m s by means of output SK1 Checking of the maximum speed by means ...

Страница 20: ...t a constant speed follows until the activation of the travel speed V3 is cancelled 4 The drive decelerates to the positioning speed V_1 5 After a short distance covered the positioning speed is switched off 6 The drive continues to decelerate 7 The control device disconnects the output MB The control is to close the brake without delay 8 The main contactor K0 has to be switched on until the conta...

Страница 21: ...open the main contactor K0 The control device blocks the power semiconductors If the controller is switched off during running the drive is decelerated because of the braking torque of the spring loaded safety brake Figure 3 2 Switching on and off the controller 3 2 2 Start and acceleration 1 The main control system activates the inputs Speeds V_ together with one Direction Preset RV_ The controll...

Страница 22: ...e determines the point X from which the deceleration has to be initiated in order to reach the stop with the positioning speed V1 Now the control device rounds out the running curve and decelerates by means of the deceleration A_NEG set Because of that in case of the ARCH TRAVEL and the NORMAL TRAVEL the decelerating distances S_31 4 5 and the rat runs s_1 5 6 are the same Figure 3 4 Comparison no...

Страница 23: ...ching off of the running signals by a distance set It is possible to delay V3 by the path S_DI3 V2 by the path S_DI2 and V1 by the path S_DI1 and then switch it off ADVANTAGE In the shaft the disconnecting tag of V3 is set as far as possible from the flush V1 After the desired running curve is available the remaining rat run is eliminated by introducing this value in parameter S_DI3 Furthermore it...

Страница 24: ...e power semi conductors and closes the output relay Controller ready RB Figure 3 7 Controlling NORMAL SLOW DOWN with control signals over time 3 2 7 Quick stop If the higher control swiches the input RF controller release off during running the control device decelerates with the maximum deceleration INSTALLATION A_MAX set If the value 3 5 m s2 is set for A_MAX factory setting the control device i...

Страница 25: ...ut delay In order to avoid oscillations the control should wait a certain time until the rope is put at rest again Figure 3 9 Readjustment with the input V_Z 3 2 9 Direction reversal The control device offers the possibility to change the direction set during running This characteristic is of particular importance in case of manual control In Figure 3 10 the switching processes between the change ...

Страница 26: ...t RV1 2 the drive is carrying out a distance S_KF set by the operator The control device itself is optimizing the driving course by means of the acceleration and deceleration set After having carried out the distance S_KF 1 5 the drive is running at the positioning speed V1 When reaching the flush switch 6 the running signals V1 ZE3 and the direction set are switched off Figure 3 11 Short Travel R...

Страница 27: ...occurs during running the drive is delayed because of the braking torque of the spring loaded safety brake In order to acknowledge the error the triggering of the controller release RF has to be stopped After switching the controller release RF on again the fault relay ST picks up again outputs ST RF RB MB inputs fault detection quit with input RF Figure 3 12 Consequence of the trouble and acknowl...

Страница 28: ...afety brake must be operated without delay through the relay MB This is the only way to ensure smooth control actions from the controller The main contactor K0 has to be switched on and off without delay together with the relay RB This is the only guarantee that the main contactor is switched in the currentless state and enables start up and stopping without jerk In case of trouble i e when the re...

Страница 29: ...f the three push buttons The parameters available are divided into menus according to whether they are belonging together The selection of a menu is effected by means of the arrow keys see figure 4 1 When pressing the key P you change to the parameters assigned to the menu The selection of a parameter is effected by means of the arrow keys When pressing the key P it is possible to change the param...

Страница 30: ...s effected the input is already protected by a password see 4 3 8 7 It is possible to change the value by means of the key or 8 Acknowledge the value in the setting box by pressing P The setting value will change up on the display The new value will be accepted The arrow stops flashing and the parameter explanation reappears in the second line 9 Press and simultaneously when the TRAVELLING menu wi...

Страница 31: ...data records and measuring the controller parameters travel diagrams and signals The ZETAMON software is available as an extra accessory It requires an IBM or an IBM compatible PC with the following minimum equipment XT AT with 640 KB RAM and a disk drive MS DOS system version 3 30 or a subsequent version The handling of this universal software is described in a concise and clearly arranged manual...

Страница 32: ...dication Distances and times Indication Statistic indications and administration of error lists Input Travel speeds Input Acceleration ramp and start up reaction Input Deceleration ramp and brake reaction If necessary Intervention of the speed regulator If necessary Possibility to allocate a password or to change to the national language Single input prior to the first travel If necessary Change o...

Страница 33: ... RF RV1 RV2 V1 and ZE1 ZE3 Inputs and outputs important for start up and stopping Indication of the trouble relay ST and the special contacts SK1 SK3 Indication of the real speed N_REAL Indication of the programed speed N_PROG Indication of the controller output CO Brake Drive Normally the range limits are not to be achieved In case of constant run the pointer should only slightly move Figure 4 5 ...

Страница 34: ...ed decelerating distance needed from the time of switching off V2 resp V3 until the positioning speed V_1 is reached Total time driven of the last run Measured time from the time the relay MB picks up until the first rotation Figure 4 6 Menu Distances times DIST TIMES S_GES 0 00 m Total distance S_1 0 00 m Dist at V_1 S_2 0 00 m Dist at V_2 S_3 0 00 m Dist at V_3 S_10 0 00 m Dist at V_1 0 S_20 0 0...

Страница 35: ...contents the keys and enable you to scroll between the entries In total 255 error messages are administered If more than 255 messages appear the oldest ones are deleted If the error list is called the last error is indicated first Working hour error number and the state of the controller are indicated as additional information A description of possible entries is given in appendix A4 Bild 4 8 Para...

Страница 36: ...for normal operation In case of installations with readjustment the additional speed V_Z is to be used The speeds V_ZE1 V_ZE2 and V_ZE3 are preferably to be used for restoring control inspection run or manual control Figure 4 9 Menu Travelling TRAVELLING V_1 Positioning speed 0 050 m s V_2 0 80 m s V_3 1 20 m s V_Z 0 010 m s V_ZE1 0 30 m s V_ZE2 0 60 m s V_ZE3 0 90 m s Intermediate speed Travel sp...

Страница 37: ...ee that the main contactor is switched in the currentless state The control device opens the mechanical brake via the relay output MB In order to avoid that the motor works against the brake that opens the start up process is decelerated by means of the pre braking period T_VB In this period of time the d c winding of the motor is impinged with a direct voltage the pre braking torque M_VB In order...

Страница 38: ...y closed the DC winding of the motor is supplied with a DC voltage the pre braking torque M_NB This voltage is switched off after a preset time ZA INTERN T_NB and the relay is released If the control switches the main contactor with this contact it is guaranteed that the opening of the main contactor is effected currentless 4 3 7 The menu CONTROLLER In menu Controller it is possible to adjust the ...

Страница 39: ...er actuating a key all parameters except PW_E are blocked 5 In order to be again able to change parameters the password in this case 12 has to be put in in parameter PW_E PA_SI The control device disposes of two parameter sets which can be changed over by means of one of the inputs ZE1 3 Besides the active working storage each parameter set has a security storage The following parameter set operat...

Страница 40: ...atio as well as the friction wheel diameter are inquired for calculation A value can be set by means of the arrow keys and the text can be scrolled by means of the key P With this conversational inquiry it is not possible to scroll back GEBER Selection of the type of the encoder installed at the motor ET 3R 1024 ET 3F 64 ET 3F 48 EXTERNAL By using an encoder of any other manufacturers with 1024 pu...

Страница 41: ...s to be driven ON In case of deceleration transfers from V3 V1 and V2 V1 the arch travel is driven dependent on the distance and using the optimum time possible OFF The arch travel is driven time dependent at all speed transfers A_MAX Input of the maximum deceleration in case the controller release RF is switched off during running At a value of 3 5 m s2 factory setting the power unit is immediate...

Страница 42: ...his parameter parameter V_G2 is faded in V 0 3m s Actual speed is smaller than 0 3 m s 1 1 V_NEN Actual speed is smaller than 1 1 V_NEN Function of the special contact O SK 3 Contact K34 K31 is closed if FB Forced air cooling is to be switched on TEMP MOT Motor temperature okay QUIT PA2 Second parameter set active V 0 3m s Actual speed is smaller than 0 3 m s 1 1 V_NEN Actual speed is smaller than...

Страница 43: ...ng attenuation is switched on the nominal value is kept in a tolerance range V_DM V_DM until the actual value follows A smaller value for V_DM causes a smoother start up VB_T1 Determines the return to zero period in which the pre braking torque M_VB returns to zero MO_T1 Determines the return to zero period in which the starting torque M0 returns to zero S0 Determines the number of speed transmitt...

Страница 44: ... device is executed and checked according to this description The drive may be put into operation only if these three conditions are fulfilled Commissioning can be carried out in accordance with the brief instructions supplied with the equipment The control parameters must be adjusted to suit the installation before the first run Observe all instructions contained on these pages If the controller ...

Страница 45: ... Input of the nominal speed of the cabin at the nominal motor rotation N_NENN Input of the type of encoder Set parameter to ON The remaining parameters are preassigned once according to the values in ANL N_NENN and V_NENN Figure 5 1 After the pre assignment by means of the parameter AUTO the speeds in menu TRAVELLING are adjusted as shown in the table If necessary adjustment to menu INTERFACES If ...

Страница 46: ... Recommendation The disconnecting tag should if possible be set to a larger length of the brake path than that determined in order to have free space for the optimization of the performance Later on it is possible to abstain from a possible subsequent shortening of the disconnecting tag in the shaft as with the parameter DECELERATE S_DI3 it is possible to shift the disconnecting tag of the control...

Страница 47: ...ns of an additional resp character in the second line With constant run the pointer should only slightly move Checking the distances In menu Distances Times it is possible to check the accuracy of the disconneting tags set Decelerating distance required from V_3 to V_1 Measured decelerating distance from V_3 to stop Measured positioning distance with speed V_1 General adjustment references Figure ...

Страница 48: ...not use a high wave tacho The mounting of the incremental speed transmitter has to be effected without clearance and vibration Possible mechanical defects e g squeezing of a guide shoe can influence the control in the same way Optimization of the positioning distance S_1 Select parameter Distances Times S_1 Check whether the rat runs are almost equal on all floors With the parameter DECELERATING S...

Страница 49: ...r INSTALLATION MO_DR Running trials UP Increase MO setting until the motor shaft no longer turns back Running trials DOWN Increase M_VB setting until the lifting gear drives down without sagging Running gear In case of running gears the start up process is absolutely different from those of the other two installation types When opening the brake it is the driver winding that is set under current T...

Страница 50: ...ve to be answered before phoning the ZIEHL ABEGG HOTLINE 6 3 Repair When removing the front plate of the control device the warranty period granted by the manufacturer lapses The removal of the front plate is only possible after having asked the manufacturer If an error in the control device can be proved it is not recommendable to repair the device locally because of economic reasons We recommend...

Страница 51: ... A1 Technical data A2 Denotation of controller types A3 Dimension sheet A4 Errorlist A5 Error tracing plan A6 Accessories A7 Changes and new functions A8 Schematic diagram A9 HOTLINE NOTIC A10 Setting data card ...

Страница 52: ...hl 0 4 Speed transmitter A encoder with two square wave signals where the phase is shifted by 90 is required As standard a resolution of 1024 pulses revolution is recommended It is possible to connect encoders with a resolution ranging from 64 to 1024 pulses ET1 15V ET2 track A ET3 track B ET4 GND ET5 15V Total current consumption of the encoder max 250 mA Current consumption per track typ 7 mA 1 ...

Страница 53: ...and bottom ZETADYN 1DV016N4 400V 3 50 60 Hz 16A IP 00 Teile Nr 00156006 Fert Nr 39135001 0001 ZIEHL ABEGG Figure A2 2 Controller data plate ZETADYN 1DV080N4 2 230V 4 400V 5 500V Nominal mains voltage 3 N Normal Nominal current 016 16A 025 25A 040 40A 060 60A 080 80A 090 90A Voltage regulated Standard version Figure A2 1 Type key ...

Страница 54: ...ain after all mains phases have been fed 5 Temp Motor Monitoring of the motor temperature Terminal P1 P2 has responded at standstill 6 Temp Motor Monitoring of the motor temperature has responded during running Reference to 5 6 If parameter INTERFACES QUIT is set to AUTOMAT the drive automatically starts running again after cooling of the motor 7 V1 V2 V3 V1 has to be smaller than V2 and V2 has to...

Страница 55: ...up trial 30 V_Z V_3 TRAVELING V_Z has to be smaller than TRAVELING V_3 31 V_Z too small Range limit achieved 32 Stop input Driving command has been connected although one parameter has still been changed 33 Temp controller Temperatur monitoring of the power stage has responded 34 Drive with brake The drive moves after is has come to a halt the mechanical brake is closed via output MB Occurs when b...

Страница 56: ...t delay by means of the relay MB Is the main contactor K0 switched on and off without delay by means of the relay RB If the control does not evaluate the contact RB Is the main contactor switched on at the latest when the driving command is fed Is the main contactor switched off time delayed only when the brake comes in The error search plan is divided into the following sections A5 1 Error messag...

Страница 57: ...of the posistors is 2 5 V 38 False rot field The current supply is not connected to the right phases Two phases on the controller board as well as on the power unit have to be changed Please observe that both boards have the same phases connected 27 Switch off Switch the controller off for a short time a After having changed the software the control device has to be switched off for a short time f...

Страница 58: ...ff after 2 seconds Exchange encoder connection ET2 and ET3 b Counter balance pulls cabin to the wrong direction Check in general whether drive brake and main contacter are okay 9 No starting The controller does not receive a encoder signal within the monitoring time ZA INTERN T_GUE a Motor turns up quickly to maximum speed and switches off Check the connection of the encoder see A5 6 b Motor does ...

Страница 59: ...speed If the control device does not register any speed Check the voltage of the transmitter supply ET1 ET2 ET3 ET4 ET5 15V track A track B GND 15V In case of slow motor rotation open brake manually for a short time the voltage levels at terminal ET2 resp ET3 have to change between and Current consumption in ET2 and ET3 typ 7 mA 1mA It is further possible to check the following two points by means...

Страница 60: ...60N4 FEFUS 063N 357023 ZETADYN 1DV080N4 FEFUS 080N 357024 ZETADYN 1DV090N4 FEFUS 100N 357025 Type of filter length width height fixing dimens top edge terminal bore hole terminal connect Weight A B C D E F G mm2 kg FEF 025 250 120 100 230 100 215 275 7 0 16 3 5 FEF 045 250 120 100 230 100 215 275 7 0 16 3 6 FEF 090 300 120 115 280 100 255 327 7 0 25 5 3 FEFUS 063 330 153 130 315 105 300 396 7 95 9...

Страница 61: ...ar signal with 64 pulses per revolution electrically separated at 12 Vss The signal is provided for monitoring devices for example GU1 Description see data sheet ET 3R 1024 Connection see figure A8 Encoder ET2R 1024 Hollow shaft encoder like the ET3R 1024 however with a closed case An additional signal track for monitoring functions is not available All encoders will be delivered with a 10m connec...

Страница 62: ...act 3 Contact K34 K33 is open if the motor temperature monitoring is triggered The running speeds V_ZE1 V_ZE3 are allocated to the additional inputs ZE1 ZE3 The contact RB Controller active is preset from the factory in a way that the relay connects the main contactors Factory setting INVERS instead of STANDARD used up to now The terminal designation of the special outputs has been changed in orde...

Страница 63: ......

Страница 64: ...ion type O Passenger elevator O Gear transmission O Freight elevator O Lifting height about m O Lifting gear O Elevator cage in the basement O Running gear Error no Error Error Problem occurs O when switching the supply voltage on O at start up O when accelerating O in case of constant run O when decelerating O at stopping Error Problem occurs O at both directions O only at Empty DOWN O only at Em...

Страница 65: ...24 MO_DR LEFT RIGHT S_ABH OFF ON A_MAX m s 2 INTERFACES I_ZE3 Manuf V_ZE3 else O_SK1 Manuf V 0 3 m s else O_SK2 Manuf 1 1 x V_NENN elset O_SK3 Manuf TEMP MOT else O_RB STANDARD INVERS QUIT MANUELL AUTOMAT V t RF V1 V3 RV1 MB inputs outputs RV2 V_1 V_3 RB MONITOR STATISTIC ACCELERATING DECELERATING INSTALLATION INTERFACES EXPANSION ZA INTERN TRAVELLING CONTROLLER OPERATING DIST TIMES Menu structure...

Страница 66: ...GUE 1 0 s V_UE 50 T_AUS_ 7 0 s Start Opti ANF_D ON V_DM 1 00 Stop Opti A_10 0 50 m s2 R_N1 50 HALT t HALT S_HALT 5 0 cm T_NB 250 ms Controller K_N1 1400 K_N1 110 ms K_N2 1400 K_N2 110 ms BR_F 70 BR_OF 18 P_T1 300 ZETAMON MS_1 0 MS_2 0 RS232 4800 Info STATUS SE_NR ZA Notice ...

Страница 67: ...hone 49 0 79 40 16 3 08 Telefax 49 0 79 40 16 2 49 Ziehl Abegg AG Heinz Ziehl Straße D 74653 Künzelsau Postfach 11 65 D 74641 Künzelsau Telephone 49 0 79 40 16 3 74 Sales department Telefax 49 0 79 40 16 2 49 ASK8 T E0197 ZA R Art Nr 00156714 GB ...

Страница 68: ...d current Control inputs Speed Ambient temperature for operation Storage temperature Protection class Unit protection Encoders 400 V 50 60 Hz 400 V 50 60 Hz Special voltages for 230 V and 500 V lines are also available appropiate type designations 16 90 A Up to 7 speeds are available and these can be selected by using potential free contacts or external 24 V D C input signals By using the special ...

Страница 69: ...6007 00156008 00156009 00156010 00156011 FEF 025 FEF 045 FEF 090 FEFUS 063 FEFUS 080 FEFUS 100 357101 357102 357103 357023 357024 357025 Hotline Control department Tel 49 0 7940 16 308 Fax 49 0 7940 16 200 e mail hotline ra ziehl abegg de Sales department Tel 49 0 7940 16 246 Fax 49 0 7940 16 249 Ziehl Abegg AG Heinz Ziehl Straße D 74653 Künzelsau Tel 49 0 7940 16 0 Fax 49 0 7940 16 249 info ziehl...

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