Numerik Jena RIK 4 User manual

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USER MANUAL
RIK 4 VACUUM
Rotary encoder for vacuum applications

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Index
1. Features and Applications .................................................................................................... 4
2. Safety ...................................................................................................................................... 5
2.1 General Information ..................................................................................................... 5
2.2 Notes on Legal Requirements ..................................................................................... 6
2.3 Notes on Transport, Storage and Handling .................................................................. 7
2.4 Notes on Operation ...................................................................................................... 8
2.5 Notes on Maintenance ................................................................................................. 8
3. Setup of the Vacuum Encoder .............................................................................................. 9
4. Grating Disks ....................................................................................................................... 10
4.1 Grating Disks - Types ................................................................................................. 11
5. Scanning Head ..................................................................................................................... 12
6. Technical Data ...................................................................................................................... 13
 6.1 ResolutionandAccuracy(Denition) ......................................................................... 13
6.2 Resolution .................................................................................................................. 13
6.3 Accuracy .................................................................................................................... 13
6.4 Mechanical Data ........................................................................................................ 14
6.5 Calculation of the Attainable Speed of Rotation ......................................................... 14
6.6 Electrical Data ............................................................................................................ 15
6.7 Switch-On Behaviour ................................................................................................. 15
6.8 Ambient Conditions .................................................................................................... 16
6.9 Cable .......................................................................................................................... 16
6.10 Connector .................................................................................................................. 16
6.11 Pin Assignment .......................................................................................................... 17
 6.12 ElectromagneticCompatibility(EMC) ........................................................................ 18
6.13 Shielding Concepts .................................................................................................... 19
6.14 Voltage Output 1 VPP .............................................................................................................................................................................. 20
6.15 Square-Wave Output RS 422 .................................................................................... 21
 6.16 OnlineCompensation(OffsetandAmplitudeControl) ............................................... 22
7. General Mounting Instructions ........................................................................................... 23
7.1 Delivery Contents ....................................................................................................... 23
7.2 Encoder Mounting Position ........................................................................................ 23
7.3 Mounting of the Encoder System ............................................................................... 24
7.4 Dimensions and Mounting Tolerances ....................................................................... 25
7.5 Mounting of the Grating Disk ..................................................................................... 27
7.6 Mounting of the Scanning Head ................................................................................. 31
2

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8. Signal Adjustment with ADJUSTMENT TOOL ................................................................... 33
8.1 Functions of the ADJUSTMENT TOOL ...................................................................... 33
 8.2 DynamicOffsetandAmplitudeControl(OnlineCompensation) ................................ 33
8.3 Scope of Delivery ....................................................................................................... 33
8.4 EPIFLEX Software ..................................................................................................... 34
9. Cleaning ................................................................................................................................ 35
10. Troubleshooting ................................................................................................................... 36
11. Ordering Key ........................................................................................................................ 37
11.1 Scanning Head .......................................................................................................... 37
11.2 Speed Chart for RIK Series ....................................................................................... 38
11.2.1 RIK 4 with Op-Amp .....................................................................................................38
11.2.2 RIK 4 without Op-Amp ................................................................................................40
11.3 Grating Disk ............................................................................................................... 42
11.4 ADJUSTMENT TOOL ................................................................................................ 43

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1. Features and Applications
Position encoders in drive systems have to meet high and controversial demands, especially in linear
drive systems. The demands opposing each other are high accuracy and resolution on the one hand
and low mass, small dimensions and high measuring speed on the other hand.
• Thegraduatedscaleisdenitiveforthequalityofalinearencoder.Requirementsformaximum
position deviations of ±2 μm per meter or less are no rarity. The emphasis is mostly on the
avoidance of shortrange errors, since long-range errors, mostly linear error components, can often
be compensated.
• The concentration of multiple axes in motion in very tight spaces, such as in semiconductor-
producing machines, requires the miniaturization of the drives, guideways and encoders.
• High machining speeds and therefore high accelerations make low masses of the components in
motion essential.
The LIK incremental encoders for vacuum applications are equipped with features which are supposed
tofulllthesehighrequirementsinanidealway.
• Due to an interpolation circuitry which is integrated in a 15-pin D-sub connector, a resolutions down
to 50 nm is possible without any additional electronics.
• The permissible traversing speed for a sinusoidal signal output amounts to 10 m/s. A Square wave
signaloutputwitharesolutionof0.1μmallowsapermissibletraversingspeedof1.6m/s.
• Theshort-rangepositionerrors(interpolationerrors)weresignicantlyreducedbyintroducingan
electronic compensation of amplitude and offset deviations of the coarse signals. This compensation
functions without following error in all velocity ranges.
Additional features:
• Suitable for vacuum applications up to 10-9mBar(UHV)atmosphericpressure
• Bake out cycles of 12 h and 150°C possible
• UHV-components will be delivered precleaned
• Possibility of electronic signal adjustment / optimization after mounting
(anelectronicsignaladjustmentafterachievingthenalpressureisrecommended)
Typical Applications:
• Production and inspection machines for the semiconductor industry
• Linear units, drives and coordinate tables
• Positioning and measuring devices
4

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2. Safety
2.1 General Information
• Make sure to familiarize yourself thoroughly with the contents of these installation instructions
before installing and starting up the encoder!
• Please contact the support of NUMERIK JENA GmbH or an authorized representation for further
information. Please visit the NUMERIK JENA website to get the contact information.
• NUMERIK JENA GmbH is not liable for damages caused by unauthorized handling of the encoders.
Any unauthorized handling leads to forfeiture of all warranty claims.
• The encoders are guaranteed to function if the mounting and operating conditions are maintained
as stated in these mounting instructions.
• Make sure to follow the right sequence of the mounting steps during mounting.
• NUMERIK JENA GmbH does not assume any liability for any damages or operating errors caused
by incorrect installation or operation.
• The stated tolerances must be maintained in order to achieve the accuracies listed in the
specications!
• Ifthe machine tolerancesexceedthe tolerances statedinthe mounting instructions,errorscan
occur in both the operation and during measuring. NUMERIK JENA GmbH assumes no liability for
this.
• Please refer to the operating manuals and safety instructions included with the devices to ensure
the reliable operation of the encoder systems, especially pertaining to:
- Auxiliaryelectronicunits
- Counters
- Displays
- Controllers
- Encoders
- Basemechanicaldevices(machinetools)
• Please pay attention to the safety instructions and warning symbols!
Danger to the device or to the
function of the device!
Pull the plug! Highlyinammable!
!
!
!

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2.2 Notes on Legal Requirements
• The NUMERIK JENA encoders conform to EC standards and carry the CE mark.
• NUMERIKJENAencodersfullltherequirementsofthe(German)ProductSafetyAct(ProdSG)
from November 8th, 2011.
• Connect NUMERIK JENA encoders only to subsequent electronics whose power supply is
generatedfromPELVsystems(EN50178).
• NUMERIKJENAencoders fulll the requirements of standard IEC61010-1only if the power is
supplied from a secondary circuit with current limitation as per IEC 610103rd Ed., Section 9.4 or
with power limitation as per IEC 60950-12nd Ed., Section 2.5 or from a Class 2 secondary circuit as
speciedinUL1310.*
• This user manual supersedes all previous editions, which thereby become invalid. The basis for
ordering from NUMERIK JENA is always the user manual edition valid when the contract is made.
• Standards(ISO,EN,etc.)applyonlywhereexplicitlystatedintheusermanual.
In place of IEC 61010-13rdEd., Section 9.4, the corresponding sections of standards DIN EN 61010-1, EN61010-1, UL 61010-1 and
CAN/CSA-C22.2 No. 61010-1 can be applied and in place of IEC 60950-12nd Ed., Section 2.5 the corresponding sections of standards
DIN EN60950-1, EN60950-1, UL60950-1, CAN/CSA-C22.2 No. 60950-1 can be applied.
*

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2.3 Notes on Transport, Storage and Handling
• Please use the original packaging for transportation and storage only!
• Afterreceivingthemeasuringsystempleasecheckthepackagingandthesealfordamagesrst!
Once opened, scratches or contaminations on the grating disk cannot be complained anymore.
• Handle the grating disk carefully! Its surface is sensitive to scratching.
• Small surface errors evident at the time of shipping are due to the production process. These errors
are no indication for a qualitiy defect and do not affect the encoder’s functionality.
• Handle the aluminum disk carefully please and protect it especially against mechanical deformation.
Unevennessofthediskinuencesthecorrectoperationoftheencoder.
Image 1
!

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2.4 Notes on Operation
• Do not connect or disconnect plugs if the power is on!
• Only operate the encoder with the supply voltage stated in this product data sheet.
• ComplywithapplicablePINassignmentifauxiliaryelectronicunitsareconnected(e.g.controller
ordisplay)!
• Integrate exposed encoders in instruments, devices or machines in such a way that these are
protected against contamination.
• Protect the grating disk against mechanical damage.
• Protect the scanning head against shock, impact and humidity.
2.5 Notes on Maintenance
• The encoder requires no maintenance whatsoever, but must be cleaned occasionally, depending
on the ambient conditions.
• ModicationsandrepairsoftheencodermayonlybecarriedoutbyNUMERIKJENAGmbHor
appropriately authorized persons.
• NUMERIK JENA GmbH is not liable for damages caused by unauthorized handling of the encoder.
All warranty claims are forfeited by unauthorized handling.
• Exposedmeasuringsystemsaresensitivetocontamination,especiallythedisksurfaceandthe
scanning windows for the counting and reference tracks on the scanning head.
• Particularlycriticalareroughandirregularcontaminationanddeposits(e.g.oil,greaseorwater).
• The user has to protect the encoder from contamination by way of appropriate design measures.
• When cleaning the encoder, ensure that no solvent ows under the grating disk!
• When cleaning the components, ensure that the scanning window and grating disk are not
scratched by any deposited particles!
• Please also pay attention to the notes in chapter 9 „Cleaning“.
!
!
!

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3. Setup of the Vacuum Encoder
The vacuum encoders from NUMERIK JENA consists of two different assemblies. One of them is made
for vacuum areas, the other is for normal atmospheric pressure. Thus only the vacuum suitable parts
will be placed in the vacuum chamber.
The vacuum assembly will be delivered especially cleaned and is suitable for vacuum applications up
to 10-9mBar(UHV)atmosphericpressure.Furthermoreitcanbebakedoutbycyclesupto12hand
150°C(302°F).
VACUUM NORMAL PRESSURE
Please note: a+ b≤5m
Image 2
Signal pass
(mustberealizedbycustomer)
15-pin D-Sub-Connector
(withelectronics)
A X2
14
1
1
14
Cable A
length a
Cable B
length b
Grating Disk
Scan head Vacuum cable

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diInside diameter of the grating disk
daOutside diameter of the grating disk
dtCenter diameter of the incremental track
d1 Outsidediameteroftheindextrack
d2 Insidediameteroftheindextrack
dLHole spacing of borings for mounting screws
d Diameter of the borings
Z Number of lines of the grating disk
4. Grating Disks
The grating disks from NUMERIK JENA are available in different sizes and versions. Hereto we have
a big selection of obtainable grating disks in supply but on request we also manufacture at customer‘s
option.
Our grating disks are made of an aluminium alloy. They are also available in glass on request.
Incremental track
Indextracks
thickness depends
to the material
for Aluminium = 0.5 mm
for glass on request
Image 3
d
di
dL
d
2
d
1
d
t
da

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Type di[mm] da[mm] dt[mm] d1[mm] d2[mm] dL[mm] d [mm] Z
RS 19/6/3600 6 + 0.1 26 19 24 14 - - 3,600
RS 19/12/3600 12 + 0.1 26 19 24 14 - - 3,600
RS 19/13/3600 13 + 0.1 26 19 24 14 - - 3,600
RS 29/16/900 16 + 0.1 36 29 34 24 - - 900
RS 29/16/1000 16 + 0.1 36 29 34 24 - - 1,000
RS 29/16/4500 16 + 0.1 36 29 34 24 - - 4,500
RS 29/20/900 20 + 0.1 36 29 34 24 - - 900
RS 39/10/1800 10 M5 46 39 44 34 14.5 2.3 1,800
RS 39/10/2048 10 M5 46 39 44 34 14.5 2.3 2,048
RS 39/10/3600 10 M5 46 39 44 34 14.5 2.3 3,600
RS 39/25/1800 25 + 0.1 46 39 44 34 - - 1,800
RS 39/25/2048 25 + 0.1 46 39 44 34 - - 2,048
RS 39/25/3600 25 + 0.1 46 39 44 34 - - 3,600
RS 39/25/6000 25 + 0.1 46 39 44 34 - - 6,000
RS 39/26/3600 26 + 0.1 46 39 44 34 - - 3,600
RS 39/30/3600 30 + 0.1 46 39 44 34 - - 3,600
RS 45/30/9000 30 + 0.1 54 45 50 40 - - 9,000
RS 45/33/9000 33 + 0.1 54 45 50 40 - - 9,000
RS 64/48,5/2048 48,5 + 0.1 71 64 69 59 - - 2,048
RS 64/48,5/4096 48,5 + 0.1 71 64 69 59 - - 4,096
RS 64/48,5/9000 48,5 + 0.1 71 64 69 59 - - 9,000
RS 64/48,5/10000 48,5 + 0.1 71 64 69 59 - - 10,000
RS 92/70/3600 70 + 0.1 100 92 97 87 - - 3,600
RS 92/70/9000 70 + 0.1 100 92 97 87 - - 9,000
RS 92/70/18000 70 + 0.1 100 92 97 87 - - 18,000
RS 92/71/18000 71 + 0.1 100 92 97 87 - - 18,000
RS 92/76/3600 76 + 0.1 100 92 97 87 - - 3,600
RS 92/80/3600 80 + 0.1 105 92 97 87 - - 3,600
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
4.1 Grating Disks - Types
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5

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(othersizesonrequest)         Chart1
RS 142/120/5400 120 + 0.2 150 142 147 137 - - 5,400
RS 142/120/8192 120 + 0.2 150 142 147 137 - - 8,192
RS 142/120/18000 120 + 0.2 150 142 147 137 - - 18,000
RS 142/122/5400 122 + 0.2 150 142 147 137 - - 5,400
RS 142/128/18000 128 + 0.2 150 142 147 137 - - 18,000
RS 192/160/24000 160 + 0.2 200 192 197 187 - - 24,000
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
-0.2
-0.5
5. Scanning Head
Type Da[mm] Dt[mm] Di[mm] DL[mm] A B C E F G H K
19 38 h6 19 4* 34 ±0.1 - - 44° 22° 12 24 8 15.0
29 45 h6 29 16 H6 41 ±0.1 120° 60° 82° 34° 16 34 13 18.8
39 55 h6 39 26 H6 51 ±0.1 120° 60° 70° 30° 16 35 18 18.6
45 64 h6 45 34 H6 60 ±0.1 120° 60° 56° 28° 16 32 20.8 18.0
64 82 h6 64 50.8 H6 77 ±0.1 90° 45° 44° 22° 18 36 30 19.2
92 110 h6 92 78 H6 106 ±0.1 90° 45° 34° 17° 18 36 44 18.5
142 160 h6 142 126 H6 156 ±0.1 90° 45° 22° 11° 18 36 69 18.7
192 210 h6 192 180 H6 206 ±0.1 - - 10° 5° 13 26 94 15.8
DaOutside diameter of the scanning head
DiInside diameter of the scanning head
DtCenter diameter of the counting track
DLHole spacing of borings for mounting screws
*distancetothecenter,donotuseasdatumdimension  Chart2
Example:RIK4-2C19/3600...
(withstopsurfaceonoutsidediameteronly)
Image 4
G
F
H
K
A
C
E
B
D
a
D
L
D
t
D
i
Di
Thickness: 6 mm

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6. Technical Data
6.1 Resolution and Accuracy (Denition)
Basically one has to differentiate between the resolution and the accuracy of a measuring system. The
two parameters are not directly interdependent and may differ from each other.
6.2 Resolution
Resolution“A“isdenedasthesmallestangularvaluethatisstilldetectedbytheevaluatingelectronics
(display,control)whenthegratingdiskisturnedrelativetothescanninghead.Theresolutioncanbe
calculated using the following formula:
A = Z · i · N [Increments/Revolution]
A = 360° [Degrees]
Z · i · N
     Z Numberoflines(gratingdisk)
i Interpolation factor of the evaluation electronics
      (5-times,10-times,25-times,50-timesor100-times)
     N Factorforevaluationmode(counter)
N = 1 for single-edge evaluation
N = 4 for 4-edge evaluation
6.3 Accuracy
Accuracy(extremesofdirectiondeviations)isaffectedby
• Graduation errors of the grating disk
• Eccentricityofthegraduationrelativetotheaxisbearing
• Radialeccentricityoftheaxisbearing
• Deviationsinthepositionsofthegratingdiskandthescanninghead(mountingtolerances)
• Interpolation error in signal processing
Theaccuracyislargelydeterminedbytheeccentricityofthegraduationrelativetotheaxisbearingand
theradialeccentricityoftheaxisbearing.Theerrorresultingfromthesefactorsiscalculatedusingthe
following formula:
Δϕ= ± 412 e
DΔϕAngular error [Arc seconds]
e Eccentricityofthegraduationrelativetotherotationalaxisincluding
 theradialeccentricityoftheaxisbearing[µm]
D Graduation diameter of the grating disk [mm]

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6.4 Mechanical Data
RIK 4
Weightofscanhead(w/ocable) 3 - 6 g
Number of counting pulses / rev.
(with signal interpolation and
4-edgeevaluation)
up to 9,600,000
Available diameter of grating disks
(Ø of graduation)
• 19 mm
• 29 mm
• 39 mm
• 45 mm
• 64 mm
• 92 mm
• 142 mm
• 192 mm
Chart 3
6.5 Calculation of the Attainable Speed of Rotation
The maximum attainable speed of rotation of the encoder is determined by the maximum output
frequency of the interpolator and/or the maximum counting frequency of the operator‘s evaluation
electronics.
In order to avoid counting errors, the interpolator‘s output frequency is matched to the counting
frequency of the operator‘s evaluation electronics.
This adaptation is possible in discrete frequency steps.
Themaximumattainablespeedofrotation(nmax)iscalculatedaccordingtothefollowingformula:
nmax = f · 60 [rpm]
i · SF · 4 · Z
f Clock frequency of the counter [Hz]
i Interpolation factor
       (5-times,10-times,25-times,50-timesor100-times)
SF Safety factor = 1.5
4 4-edge evaluation
      Z Numberoflines(Gratingdisk)

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6.7 Switch-On Behaviour
During power-up procedure of the encoder system the level of power voltage and
signal lines must be below 250 mV.
If the encoder system will be powered-up at a residual voltage between a range of 250 and 400 mV,
internal sensor parameter will not set correctly. This will lead to incorrect encoder signals.
This behaviour has to be observed especially during reset routines of controllers.
6.6 Electrical Data
RIK 4
Scanning frequency max.500kHz
Output Interfaces
Voltage output 1 VPP(15-pinD-Sub)
Square wave output RS422withinterpolationupto100-times(15-pinD-Sub)
Supply voltage 5 V ±10%
Current Consumption
Voltage output ≤80mA*
Square wave output ≤210mA*
Cable
Cable diameter 3.7 mm
Permissible bending radius • occasionalexing~8mm
• constantexing~40mm
Length from scan head to the
D-Sub connector 3m(standard:0.3m,0.5m,1.0m,1.5m,2.0m,3.0m)
Length from D-Sub connector to
the controller max.100m(Thenecessarysupplyvoltagemustbeensured!)
*with120Ωloadresistance        Chart4
Image 5
VCC
V
400 mV
250 mV
sin
cos
Forbidden range during power-up or reset
!

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16
RIK 4
Operating temperature range 0°Cto+55°C(+32°Fto+131°F)
Storage temperature range -20°Cto+70°C(-4°Fto+158°F)
Vibration(50Hz...2,000Hz) ≤200 ms-2(20g)
Shock(11ms) ≤400 ms-2(40g)
Humidity ≤93%relativehumidity(nocondensationforming)
6.8 Ambient Conditions
6.9 Cable
Scanning Head Cable (connection cable from scanning head to D-Sub connector)
• Provide a strain relief for the cable near the scanning head.
• The encoder cables and connecting cables must be laid away from sources of interference (e.g.
mainscables,fuses,motors,magneticvalvesorpowersupplies).Normallyadistanceof≥100mm
willbesufcient.
• Install the cable in a way that it cannot be damaged by the rotating hub. Please pay attention to the
permissiblebendingradius(seealsopoint7.2)!
Extension Cable (connection cable from D-Sub connector to controller)
• UsepreferablyoriginalextensioncablesmadebyNUMERIKJENA.Thisguaranteesanoptimum
compatibility with the encoders and ensures a maximum protection against electromagnetic
interferences.
• PleaseconsultthetechnicalsupportofNUMERIKJENAbeforeusingselfmanufacturedextension
cables.
• Do not install any other signal lines in the encoder cable!
6.10 Connector
15-pin D-Sub Connector
Chart 5
Image 6
10 98
7
6
54
3
2
1
12
11
48
10
04
32
41
53
Ø 82
1x32M
7 8
12 3 45678
910 11 12 13 14 15
1 2 3 4 5
96
10
9
8
7
6
543
2
1
12
11
56

SIMPLY PRECISE
17
6.11 Pin Assignment
A-14pinJST** 1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 VPP 0V U 1- NAS SCL SDA CS U 1+ U 0+ U 2- 5V U 2+ U 0-
RS 422 0V Z 1- NAS SCL SDA CS Z 1+ Z 0+ Z 2- 5V Z 2+ Z 0-
Wire colour wh ye vt bk og trans gn gy rd bn bu pk
X2-14pinJST** 1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 VPP 0V U 1- NAS SCL SDA CS U 1+ U 0+ U 2- 5V U 2+ U 0-
RS 422 0V Z 1- NAS SCL SDA CS Z 1+ Z 0+ Z 2- 5V Z 2+ Z 0-
Cable Ø 3.7 mm wh bn vt ye bn/gn wh/gn gn gy rd bu bk pk
Cable Ø 5.1 mm wh ye vt bk bn/gn wh/gn gn gy rd bn bu pk wh/ye* ye/bn*
* wirehastobeinsulated
** testconnector(mustberemovedbycustomer)
X3 - 15 pin D-Sub 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Housing
1 VPP - - - U 0- U 2- U 1- - 5V 0V - - U 0+ U 2+ U 1+ - Shield
RS 422 - - NAS Z 0- Z 2- Z 1- - 5V 0V - AS Z 0+ Z 2+ Z 1+ - Shield
RS 422 1 Vss
Z 1+ counting signal 0° U
1+ countingsignal0°(sin)
Z 1- neg.countingsignal0°(180°)  U1- countingsignal180°(-sin)
Z 2+ counting signal 90° U 2+ countingsignal90°(cos)
Z 2- neg.countingsignal90°(270°)  U2- countingsignal270°(-cos)
Z 0+ reference signal U
0+ reference signal
Z 0- neg. reference signal U 0- neg. reference signal
0V ground SCL programming wire
5V operating voltage SDA programming wire
AS error signal CS programming wire
NAS neg. error signal

SIMPLY PRECISE
18
6.12 Electromagnetic Compatibility (EMC)
Pleaseobservethefollowingtoensuremaximumprotectionagainstelectricaland
magneticelds:
• The encoder must be mounted to a galvanic conductive surface. The mounting surfaces, the
threads of the mounting screws and the threads in the machine must be free from electrically non-
conductive coatings.
• Maintain the NUMERIK JENA shielding concept for the measuring system!
• Shielding for encoders without connectors:
- Whenconnecteddirectlywiththeevaluationelectronics,ensurethattheexternalshieldofthe
cable is well grounded
- Ifcableconnectors(e.g.terminalstrips,etc.)areused,connecttheexternalshieldsofthe
cables with each other and with the shielding of the cable connector
• When using additional electronics, connect the housing electrically conducting to ensure good
galvanic conductivity. For insulated installation the housing should be connected at the shortest
distancebyanadditionalpotentialequalizationline(Culinewithcrosssection≥6mm2)withthe
machine’s protective ground.
• PleasecontacttheNUMERIKJENAsupportorthatoftheappropriatemanufacturerifyouexperience
anyproblemswhenworkingwithspecicdisplayorcontrolunits.
!

SIMPLY PRECISE
19
6.13 Shielding Concepts
RIK 4 Abbildung
1 VPP and RS 422 output
1 VPP output
RS 422 output
Chart 6
0 V
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
Extension cable
Extension cable
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
0 V
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
Extension cable
Extension cable
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
0 V
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
Extension cable
Extension cable
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics
ShieldScanning head
Encoder cable Ø 3.7 mm
Subsequent
electronics

SIMPLY PRECISE
20
6.14 Voltage Output 1 VPP
Optimal Connection Circuit
Signal Curve
Difference signals measured at R0:
U1= U1+ - U1- = 0.6 ... 1.2 VPP (Rated voltage: 1 VPP)
U2= U2+ - U2- = 0.6 ... 1.2 VPP (Rated voltage: 1 VPP)
U0= U0+ - U0-=0.5...1.2V (Ratedvoltage:0.8V)
Image 7
Image 8
+
+
+
–
–
–
R1
R2
R2
R1
R0
–UB
+UB
Ua
0 V
UUU
1– 2– 0–
/ /
UUU
1+ 2+ 0+
/ /
R0= 120 Ω
0U0
U1
U2
0
0
360° (Signal period)
90° (Phase difference)