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UMG 509-PRO

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7.2

Ground wire connection

Use a ring cable lug to connect the protective
conductor to the device.

7.3

Circuit breaker

Provide a suitable circuit breaker in a building in-
stallation to disconnect the device from the power
supply.

·Install the circuit breaker near the device and

within easy reach of the user.

·Mark the switch as an isolation device.

7.4

Supply voltage

WARNING

Risk of injury due to electrical voltage!

Severe bodily injury or death can result from:

·Touching bare or stripped leads that are ener-

gized.

·Device inputs that pose a hazard when

touched.

·Disconnect your system from the power supply

before mounting and connecting the device!

·Secure it against being switched on!

·Check to be sure it is de-energized!

·Ground and short circuit!

·Cover or block off adjacent live parts!

A supply voltage is required to operate the device.
The level of the supply voltage for your device can
be found on the rating plate.

Before applying the supply voltage, make sure
that the voltage and frequency match the specifi-
cations on the rating plate.

The supply voltage is connected via the plug-in
terminals on the rear of the device.

Connect the supply voltage via a UL/IEC ap-
proved fuse.

ATTENTION

Material damage due to disregard of the con-

nection instructions!

Disregard of the connection instructions or ex-

ceeding the permissible voltage range can damage

or destroy your device.

Before connecting the device to the supply volt-

age, please note:

·Voltage and frequency must correspond to the

specifications on the rating plate!

·Observe the limit values as described (see sec-

tion „15. Technical data“ on page 100)!

·In the building installation, secure the supply

voltage with a UL/IEC listed line circuit breaker/

fuse!

·Observe the following for the isolation device:

- Install it close to the device and easily acces-

sible for the user.

- Mark it for the respective device.

·Do not tap the supply voltage from the voltage

transformers.

·Provide a fuse for the neutral conductor if the

neutral conductor terminal of the source is not

grounded.

INFORMATION

The fuse is a line protection - it is not a device

protection!

N PE

Fig. Connection example for the supply voltage

Fuse

Protective

conductor

Isolation device

Connection point of the protective conductor

Содержание UMG 509-PRO

Страница 1: ...electronics GmbH Vor dem Polst ck 6 35633 Lahnau Germany Support 49 6441 9642 22 info janitza com www janitza com www janitza com Doc no 2 059 011 2 s 10 2022 Power Quality Analyzer UMG 509 Pro User...

Страница 2: ...UMG 509 PRO www janitza com 2 UMG 509 Pro Power Quality Analyzer Doc no 2 059 011 2 s 10 2022 The German version is the original edition of the documentation...

Страница 3: ...current state of the information available to us Nonetheless we wish to point out that updates of this document are not always possible at the same time as technical refinements are implemented in ou...

Страница 4: ...Electrically qualified personnel 14 2 6 Warranty in the event of damage 14 2 7 Safety information for handling current transformers and measurement devices with residual current measurement 14 2 8 Han...

Страница 5: ...und wire connection 29 7 3 Circuit breaker 29 7 4 Supply voltage 29 7 5 Measured voltage 30 7 5 1 Overvoltage 30 7 5 2 Frequency 30 7 6 Current measurement 31 7 6 1 Current direction 32 7 6 2 Summatio...

Страница 6: ...45 9 2 Digital outputs 46 10 Operation 48 10 1 Button assignment 48 10 2 Measuring display Home 48 10 3 Measuring display 49 10 3 1 Main values 49 10 3 2 By values 49 10 4 Selecting a measuring displ...

Страница 7: ...clock types 71 12 Commissioning 72 12 1 Supply voltage 72 12 2 Measured voltage 72 12 3 Frequency measurement 73 12 4 Direction of rotary field 73 12 5 Measured current 74 12 5 1 Phasor diagram exampl...

Страница 8: ...3 1 5 Events 92 13 1 6 Transients 92 13 2 Power quality 93 13 3 Apps 96 13 3 1 Push Service 96 13 4 Information 97 13 4 1 Device information 97 13 4 2 Display 97 13 4 3 Downloads 97 14 Service and mai...

Страница 9: ...4 Temperature measurement input 103 15 5 Digital inputs and outputs 104 15 6 Interfaces 105 15 7 Performance characteristics of functions 106 15 8 Dimensional drawings 107 16 Procedure in the event o...

Страница 10: ...Separate validities and distinctions are marked First read and understand the documents asso ciated with the product Keep the documents associated with the prod uct available for the entire service li...

Страница 11: ...com plete with accessories Observe special regulations for devices with built in batteries or rechargeable batteries Do not attempt to open or repair the device the component on your own because other...

Страница 12: ...rd DANGER Warns of an imminent danger which if not avoid ed results in serious or fatal injury WARNING Warns of a potentially hazardous situation which if not avoided could result in serious injury or...

Страница 13: ...ithout prior inspection by your plant manager with specialist knowledge In particular the safety of persons material assets and the ap plicable standards must be taken into account WARNING Risk of inj...

Страница 14: ...anty of any possible resulting damage In this regard please take note of section 3 3 Intended use on page 16 2 7 Safety information for handling current transformers and measurement devic es with resi...

Страница 15: ...which represent a hazard when touched or damage to your device or system Ensure reinforced or double insulation with respect to the supply circuits Ensure galvanic isolation of the residual cur rent m...

Страница 16: ...if a limit value is exceeded The device is therefore not an independent protective device against electric shock 3 2 Incoming goods inspection The prerequisites for trouble free and safe op eration o...

Страница 17: ...measured values Clock and battery Working temperature range 10 C 55 C Measurement Measurement in TN and TT networks Continuous sampling of voltage and current measurement inputs at 20 kHz Acquisition...

Страница 18: ...distance between the device and the radio television receiver Connect the device and the radio television receiver in different circuits if necessary contact Janitza support or a radio television tech...

Страница 19: ...bus protocol can be used to change and retrieve data with the help of the Modbus address list This list is available via the device homepage 3 11 GridVis network analysis software You can program the...

Страница 20: ...onfiguration menu Back 4 Button 2 Select digit switch between the main values 5 Button 3 Decrement digit by 1 select by values select menu item 6 Button 4 Increment digit by 1 select by values select...

Страница 21: ...urrent measurement inputs I1 to I4 4 Voltage measurement inputs V1 V4 and Vn 5 Digital inputs outputs 6 Temperature measurement inputs 7 Residual current measurement inputs I5 and I6 8 DIP switch S1 9...

Страница 22: ...on The cut out dimension in the switchboard is 138 0 8 mm x 138 0 8 mm Follow these instructions to achieve adequate ventilation Install the device vertically Maintain a minimum clearance of 50 mm up...

Страница 23: ...23 UMG 509 PRO www janitza com...

Страница 24: ...ounded Single phase 2 conductor systems with grounded neutral conduc tor Split single phase 3 conduc tor system with grounded neutral con ductor Application areas for the device 2 3 and 4 conductor ne...

Страница 25: ...ry supply Voltage measurement 4M 4M 4M 4M V1 V3 V2 4M V4 Grounding of the system Impedance L1 UMG 509 PRO Vref Fig Schematic diagram UMG 509 PRO in an IT network without N 6 2 Three phase 4 conductor...

Страница 26: ...600V 400V 690V 417V 720V Maximum nominal voltage of the network Fig Nominal network voltages suitable for measurement in puts in a three phase 4 conductor network with grounded neutral conductor accor...

Страница 27: ...27 UMG 509 PRO www janitza com...

Страница 28: ...with GridVis UMG 509 PRO as gateway UMG 104 Slave 1 UMG 103 Slave 2 UMG 604 Slave 3 Ethernet Modbus Modbus Modbus Ethernet PC with GridVis UMG 509 PRO RS 232 RS 485 PC with GridVis UMG 509 PRO Ethern...

Страница 29: ...specifi cations on the rating plate The supply voltage is connected via the plug in terminals on the rear of the device Connect the supply voltage via a UL IEC ap proved fuse ATTENTION Material damage...

Страница 30: ...on conditions for the voltage measurement inputs can result in damage to the device or serious injury including death Therefore please observe the following Switch off your installation before commenc...

Страница 31: ...transformers which are operated exposed on the secondary side can carry hazardous live high voltage peaks which can lead to serious bodily injury or death Therefore please abide by the following Swit...

Страница 32: ...ent via a summation cur rent transformer WARNING Disregard of the connection conditions of the transformers to Janitza measurement devices or their components can lead to injuries or even death or to...

Страница 33: ...3 V4 Vref 3p 4w L1 L2 V 1p 2w L1 L2 L3 V1 V2 V3 V4 Vref 3p 3wu L1 L2 L3 V1 V2 V3 V4 Vref 3p 3w L L L L V 3p 5w N Fig Measurement in a three phase 3 conductor network L1 L2 L3 N V1 V2 V3 V4 Vref 3p 4wu...

Страница 34: ...I1 I2 I3 I4 S1 S2 S1 S2 S1 S2 S1 S2 Fig Measurement in a three phase 3 conductor network via two current transformers L1 L2 L3 N 3p 2i L1 I1 I2 I3 I4 S1 S2 S1 S2 S1 S2 S1 S2 Fig Measurement in a thre...

Страница 35: ...Measured voltages and currents must originate from the same network 7 7 3 Auxiliary input L1 L2 L3 N V4 N 4w 1m I4 S1 S2 L1 L2 L3 V4 N 3w 1m I4 S1 S2 N PE V4 N 2w 1n I4 S1 S2 Fig Measurement in a thr...

Страница 36: ...ion on failure monitoring see the section 12 7 Failure monitoring RCM on page 76 CAUTION Risk of injury or damage to the meter your system due to short circuit Inadequate insulation of the operating e...

Страница 37: ...e to electrical malfunction With a cable length of more than 30 m there is an increased probability of transmission errors and damage to the device due to atmospheric dis charge Use a shielded cable f...

Страница 38: ...put are not galvanically isolated from each other Consequently it is essential to note that dan gerous voltages at these inputs can have an effect on the other respective connections 7 8 4 Example ins...

Страница 39: ...to lead the cable into the switchboard cabinet Cable Strain relief Braided shielding of the cable Grounding clamp Noiseless ground Fig Shielding design at the cabinet entry WARNING Risk of injury due...

Страница 40: ...nput and residual current measurement input are not galvanically isolated from each other Consequently it is essential to note that dan gerous voltages at these inputs can have an effect on the other...

Страница 41: ...bus lines 1 Connect the incoming bus line to terminals 1A and 1B of the Profibus connector 2 Connect the continuing bus line for the next device in the line to terminals 2A and 2B 3 If no device follo...

Страница 42: ...h bus termination switched on must be powered It is recommended that the master be placed at the end of a segment If the master is replaced with the bus termination switched on the bus is out of opera...

Страница 43: ...ns and measurement devices Inform your network administrator and or IT representative Always keep the meter firmware up to date and protect the communication to the meter with an external firewall Clo...

Страница 44: ...Digital inputs and outputs Fig Connection of digital inputs 9 1 Digital inputs The device has two digital inputs An input signal is detected at a digital input when a voltage of at least 18 V and at m...

Страница 45: ...62053 31 to each digital input You need an external auxiliary voltage with an output voltage in the range of 18 28 VDC and a resistor of 1 5 kohms 24 VDC External Auxiliary voltage UMG 509 PRO Digital...

Страница 46: ...n using the digital outputs as pulse outputs measurement errors can occur due to residual ripple For the supply voltage DC of the digital inputs and outputs use power supplies whose re sidual ripple i...

Страница 47: ...47 UMG 509 PRO www janitza com...

Страница 48: ...ange digit 1 By values select Select menu item Change digit 1 By values select Select menu item Select digit Select main values U I P Open selection menu Confirm selection 10 2 Measuring display Home...

Страница 49: ...ring displays An overview of the measuring displays can be found in the sec tion 17 2 Overview of measuring displays 10 3 2 By values The by values of a measuring display can be selected with buttons...

Страница 50: ...ion button 1 Home always takes you to the first measuring display Proceed as follows to go to a measuring display with by values 1 Select the measuring display with the main values 2 Use function butt...

Страница 51: ...g Additional information on voltage L1 N 10 6 Deleting values To delete individual minimum and maximum val ues proceed as follows 1 Scroll to the desired measuring display using buttons 2 to 5 2 Activ...

Страница 52: ...to display a specific transient voltage 1 Scroll to the Transients main value display using buttons 2 or 5 2 Select the desired page using button 4 3 Go to the transient list with button 6 Select The...

Страница 53: ...ll to the main Events display using but tons 2 or 5 2 Select the desired page using button 4 3 Go to the event list with button 6 selection The background color for date time changes from gray to blue...

Страница 54: ...as follows to change the system lan guage 1 Open the Configuration menu 2 Press buttons 3 or 4 until the language field is highlighted 3 Open the language selection with button 6 Enter 4 Use buttons 3...

Страница 55: ...o to the next digit with button 5 5 Repeat steps 3 and 4 until you have completed the desired input 6 Confirm your entry with button 6 11 2 2 Fieldbus If you connect the device via the RS 485 in terfa...

Страница 56: ...ome from the same network Fig Measurements menu 11 3 1 Transformers The following settings for main and auxiliary mea surements can be made here Current transformer Voltage transformer Nominal current...

Страница 57: ...rent measurement inputs of the measurement devices Furthermore please note that Janitza measure ment devices and components are not to be used for critical switching control or protection applications...

Страница 58: ...al voltage ULN is calculated automatically Formula ULN ULL 3 Setting range ULN 0 999999 V Setting range ULL 0 999999 V Factory default setting 230 V ULN 398 V ULL You can also select the primary volta...

Страница 59: ...or voltage Fig Connection diagram for voltage mea surement Current measurement connection diagram For current measurement you can choose be tween the following connection schemes 3p4w 3 phases 4 condu...

Страница 60: ...asurement Lock transformer ratios Locking unlocking of the current and voltage transformer ratios can be done via the display The status can be read out via an internal device address If the entry Loc...

Страница 61: ...seconds each further transient is recorded with 512 points Fig Example Relevant voltage ULL Fig Setting MAIN Transients ULL You can display recorded transients using the GridVis event browser The foll...

Страница 62: ...re set in percent of the nominal value Limit values are configurable for Overvoltage and undervoltage Overcurrent If an event has occurred the associated mea sured value is recorded with the set lead...

Страница 63: ...he overvoltage is set in of the nominal voltage ULN Overcurrent The rapid increase of the current is set in of the nominal current Apply L2 L4 Monitoring of the events can be configured per phase You...

Страница 64: ...ncy is not measured 60 Hz The mains frequency is fixed at 60 Hz The mains frequency is not measured Fig Setting the nominal mains frequency Automatic frequency determination For automatic determinatio...

Страница 65: ...onfiguration directly on the device is then only possible after entering the password The password consists of a 6 digit number Setting range 1 999999 with password 0 without password No password 0 is...

Страница 66: ...e any possible pro duction related contents of the energy meters min max values and recordings Deleting min max values You can delete all min and max values in the device at the same time You can find...

Страница 67: ...utton 6 The font color changes to red and a cursor appears 4 Change the value to Yes by pressing button 4 5 Confirm your entry with button 6 The device restarts within approx 10 seconds 11 5 Display H...

Страница 68: ...cally switches to the next measuring display Setting range 0 255 seconds Factory default setting 0 seconds 11 6 Colors Here you can select the colors for the display of current and voltage in the grap...

Страница 69: ...cturer requires the serial number of the device and the name of the func tion to be enabled To unlock the function enter the 6 digit activation code in the corresponding line Note that the activation...

Страница 70: ...vice configuration Via the parameter _MODE_NTP the Modbus address can be found in the Modbus address list of your device at www janitza com 11 8 1 Important Modbus parameters for the PTP configuration...

Страница 71: ...th a master as the slave and synchronizes its time with the master Boundary clock BC Clock that contains several ordinary clocks several ports and as the master synchro nizes several slaves with its t...

Страница 72: ...evice for measuring DC voltage INFORMATION Before commissioning delete any possible pro duction related contents of the energy meters minimum and maximum values and recordings 12 2 Measured voltage Pr...

Страница 73: ...easure ment inputs The mains frequency must be in the range from 40 Hz to 70 Hz If the measured voltage is not sufficiently high the device cannot determine the mains frequen cy and therefore cannot c...

Страница 74: ...al on the back of the device and secure it suffi ciently with the two screws 3 Compare the current displayed on the device with the applied input current The currents must match taking into account th...

Страница 75: ...nections k and I are reversed or there is a feedback into the supply network 12 6 Residual current Only connect residual current transformers with a nominal current of 30 mA to inputs I5 and I6 Both r...

Страница 76: ...8907 I5 18908 I6 0 Connection to residual current transformer at I5 or I6 is fault free 1 Error in the current transformer connection at I5 or I6 12 7 1 Alarm status The bitwise coding within the alar...

Страница 77: ...phase with the current transformer input that is not short circuited If this is not the case check the connection of the measured voltage and measured current If the amount of active power is correct...

Страница 78: ...ers Data bits 8 Parity none Stop bits UMG 509 PRO 2 Stop bits external 1 or 2 Number formats short 16 bit 215 215 1 Float 32 bit IEEE 754 INFORMATION Broadcast address 0 is not supported by the device...

Страница 79: ...bus profiles profile numbers 0 15 With Jasic programs you may create additional Profibus profiles profile numbers 16 255 Factory preconfigured Profibus profiles can be changed later on Device master f...

Страница 80: ...ram is required Fig Block diagram for data exchange between PLC and UMG PLC Process output area of the PLC 1st byte Profile number 0 15 2nd byte Data to the UMG 509 PRO Process input area of the PLC 1...

Страница 81: ...L3 Float 1 11 41 Current L4 Float 1 12 45 Active power L1 Float 1 13 49 Active power L2 Float 1 14 53 Active power L3 Float 1 15 57 Active power L4 Float 1 16 61 Cos phi math L1 Float 1 17 65 Cos phi...

Страница 82: ...5 Active power L3 Float 1 13 49 Cos phi math L1 Float 1 14 53 Cos phi math L2 Float 1 15 57 Cos phi math L3 Float 1 16 61 Frequency Float 1 17 65 Active power sum L1 L3 Float 1 18 69 Reactive power su...

Страница 83: ...13 49 Inductive reactive energy L3 Float 1 Profibus profile number 3 Byte index Value type Values format Scaling 1 1 Active power L1 Float 1 2 5 Active power L2 Float 1 3 9 Active power L3 Float 1 4 1...

Страница 84: ...in average value arithmetic Min max values 1 Active power L1 L2 L3 L4 15 min average value arithmetic Min max values 1 Active power sum L1 L3 L1 L4 15 min average value arithmetic Min max values 1 Rea...

Страница 85: ...ts area to define the following for both digital inputs Which value type the incoming signal has Which scaling factor should be used for the value Fig Configuring inputs of the UMG via GridVis 12 13 2...

Страница 86: ...Tab Examples of the maximum possible number of pulses per hour INFORMATION The pulse interval is proportional to the power within the selected settings INFORMATION When programming with the GridVis so...

Страница 87: ...kW x 3 Max connected load 135 kW 3 Calculate the pulse valency Pulse valency Max connected load Max number of pulses h Wh pulse Pulse valency 135 kW 60000 pulses h Pulse valency 0 00225 kWh pulse Pul...

Страница 88: ...r de vice by entering the IP address of the device into a web browser on your terminal device Connect ing the device to the Internet is described in the section 11 2 1 Ethernet TCP IP 13 Device homepa...

Страница 89: ...individual measured values The following menu items are available Brief overview Detailed measured values Charts RCM residual current measurement Events Transients 13 1 1 Brief overview The brief ove...

Страница 90: ...measured values The overview gives you access to extensive information on the following points Voltage Current Power Harmonic oscillations Work Peripherals digital inputs outputs temperature measurem...

Страница 91: ...play a graph of the measured values drag the desired values from the list on the left side of the screen into the field in the center of the screen Fig Device home page event recordings 13 1 4 RCM res...

Страница 92: ...current or undervoltage More information on event recording can be found under 11 3 3 Events Fig Event recording 13 1 6 Transients The Transients area shows the graphical representation of transients...

Страница 93: ...4 can be temporarily changed within the indicator settings However this has no lasting effect A change of the class is reset to class 2 compatibility level as in the public network after leaving the...

Страница 94: ...UMG 509 PRO 94 www janitza com Fig IEC 61000 2 4 Watchdog parameters with traffic light principle report...

Страница 95: ...95 UMG 509 PRO www janitza com Fig IEC61000 2 4 PQ indicator parameters with traffic light principle snapshot...

Страница 96: ...vice later on by installing additional apps 13 3 1 Push Service An example of an installable app is the Push Service With the Push Service measured values are sent directly from the device to a cloud...

Страница 97: ...4 2 Display Under the item Display you will find the display of the device which reflects the actual display You can remotely control the device here by pressing the control buttons with the mouse Fig...

Страница 98: ...are not described in this manual please contact the manufacturer directly The following information is essential for us to be able to answer any questions you may have Device designation see rating pl...

Страница 99: ...ttery The clock provides date and time information for records min and max values and events for example The life expectancy of the battery is at least 5 years at a storage temperature of 45 C The typ...

Страница 100: ...ensation Operating elevation 0 2000 m above sea level Pollution degree 2 Mounting orientation vertical Ventilation forced ventilation is not required Protection against foreign matter and water Front...

Страница 101: ...e 4 conductor systems with rated voltages up to 417 V 720 V 347 V 600 V UL listed Three phase 3 conductor systems with rated voltages up to 600 V The voltage measurement inputs are designed as follows...

Страница 102: ...ble with wire ferrules without plastic sleeve 0 20 1 5 mm2 Flexible with wire ferrules with plastic sleeve 0 20 1 5 mm2 Strip length 7 mm Tightening torque 0 20 0 25 Nm Cable length up to 30 m not shi...

Страница 103: ...tion capacity of the terminal points temperature measurement input Connectible conductors Only one conductor may be connected per terminal point Single core multi core fine stranded 0 08 1 5 mm2 Termi...

Страница 104: ...of voltage exceedances 20 ms Switching frequency max 20 Hz Cable length up to 30 m not shielded greater than 30 m shielded Digital inputs 2 digital inputs with a common ground Maximum counter frequen...

Страница 105: ...Function Modbus gateway embedded web server HTTP Protocols CP IP EMAIL SMTP DHCP client BootP Modbus TCP Modbus RTU over Ethernet FTP ICMP Ping NTP TFTP BACnet option SNMP Potential isolation and elec...

Страница 106: ...57 12 0 005 7 Arms 0 A 9999 kA Residual currents I5 I6 IDIFF 1 IEC61557 12 0 40 mArms 0 A 9999 kA Neutral conductor current calculated INc 0 5 IEC61557 12 0 005 21 A 0 A 9999 kA Voltage U L N 0 1 IEC6...

Страница 107: ...107 UMG 509 PRO www janitza com 15 8 Dimensional drawings Fig Side view Fig Bottom view...

Страница 108: ...nt at the measuring input is too low Install current transformers with a lower current transformer ratio Displayed voltage is too low or too high Measurement on the wrong phase Check connection and co...

Страница 109: ...ary Display of measuring range exceeded overload Voltage or current measurement input outside the measuring range see the section Overrange Check connection and correct if necessary Use suitable volta...

Страница 110: ...ransformer Transients Events Nominal frequency Thermistor input System Information Password Reset Display Colors U I L1 L4 Enhancements Activation Jasic status Transformer Phase L1 L2 L3 L4 I Diff1 I...

Страница 111: ...dual current L5 L6 K factor L1 L4 THD I L1 L4 Current Sum Main values Apparent en ergy Overview By values Active energy Overview Tariff 1 Tariff 2 Reactive energy Overview Tariff 1 Tariff 2 Active pow...

Страница 112: ...power history L1 L2 L3 L4 L1 L3 L1 L4 Reactive power history L1 L2 L3 L4 L1 L3 L1 L4 Current history L1 L2 L3 L4 Voltage history L1 L2 L3 L4 Harmonics currents Voltage L1 L2 L3 L4 Transients 1 8 9 16...

Страница 113: ...hasor diagram Oscilloscope L1 Communication status Oscilloscope L2 L3 L4 Oscilloscope ULN1 3 ULN1 4 Oscilloscope IL1 3 IL1 4 Main values By values Fig Schematic representation of the menu navigation f...

Страница 114: ...1 S2 I1 19 20 S1 S2 I2 21 22 S1 S2 I3 23 24 S1 S2 I4 25 26 VN 31 L3 Hilfsenergie Auxiliary Supply 17 18 L N PE Verbraucher Loads PE N L1 RS485 8 9 10 Temp PT100 IPE IDIFF 0 30 mA 4 5 6 7 RCM I5 I6 11...

Страница 115: ...115 UMG 509 PRO www janitza com...

Страница 116: ...ct to technical alterations The current version of the document can be found in the download area at www janitza com Janitza electronics GmbH Vor dem Polst ck 6 35633 Lahnau Germany Tel 49 6441 9642 0...

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