Pepperl+Fuchs AVS78E User manual

Singleturn absolute encoder
AVS78E Mining
<Up to 16 Bit singleturn
<ATEX-approval for mining
<IECEx approval
<Flameproof enclosure
<Removable connection cap
<Galvanically isolated RS 422 interface
Function
This absolute rotary encoder returns a position value corresponding to the shaft position via the SSI interface.
In order to obtain the position data, the controller sends a start sequence to the absolute rotary encoder. The encoder then responds
synchronously to the pulses from the controller with the position data.
The modular design enables you to order the absolute rotary encoder so that it fulfills your requirements. A listing of the part options can be found
in the ordering information.
You can select the counting direction via 2 functional inputs and set the zero position.
Dimensions
Encoder length L
Version
Radial cable exit
Axial cable exit
Clamping flange
Servo flange
Clamping flange
Servo flange
Length L
118 mm
118 mm
134 mm
134 mm
ø48 ±0.1
15°
15°
ø69 ±0.1
L 20
16 5
4
ø10 g7
ø36 f7
ø78
54
78
15
95
117
-0.05 -0.10
3.5 Nm
±0.5 Nm
Clamping flange, cable exit radial
3 x M6,
6 deep
3 x 120°
3 x M3, 6 deep
3 x 120°
3 x M4, 6 deep
3 x 120°
ø 3, 8 deep
1
Release date: 2023-02-- 09 Date of
Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com [email protected].com
[e-mail]

Dimensions
L
54
78
15
95
117
ø42 ±0.1
ø60 ±0.1 20
4 5
4
ø10 g7
ø50h7
ø78
-0.05 -0.10
3.5 Nm
±0.5 Nm
Servo flange, radial cable exit
3 x M6,
10 deep
3 x 120°
3 x M4,
9 deep
3 x 120°
ø48 ±0.1
15°
15°
ø69 ±0.1
L 20
16 5
4
ø10 g7
ø36 f7
ø78
92
-0.05 -0.10
3.5 Nm ±0.5 Nm
Clamping flange, axial cable exit
3 x M6,
6 deep
3 x 120°
3 x M3,
6 deep
3 x 120°
3 x M4, 6 deep
3 x 120°
ø 3, 8 deep
ø42 ±0.1
ø60 ±0.1 L 20
4 5
4
ø10 g7
ø50h7
ø78
92
-0.05 -0.10
3.5 Nm ±0.5 Nm
Servo flange, axial cable exit
3 x M6, 10 deep
3 x 120°
3 x M4, 9 deep
3 x 120°
Shaft 12 mm 2 flats
at 120°
2 flats
at 120°
4
8
M17 x 0.75
4 25 4 25
4
8
M17 x 0.75
ø12h7 ø12h7
Technical Data
General specifications
Singleturn absolute encoder AVS78E Mining
Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
2
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com [email protected].com
[e-mail]

Technical Data
Detection type photoelectric sampling
Device type Singleturn absolute encoder
Functional safety related parameters
MTTFd210 a
L10 7.7 E+9 at 3000 rpm
Electrical specifications
Operating voltage UB10 ... 30 V DC
No-load supply current I0max. 90 mA
Linearity ± 2 LSB at 16 Bit, ± 1 LSB at 13 Bit, ± 0,5 LSB at 12 Bit
Output code Gray code, binary code
Code course (counting direction) see input 1
Interface
Interface type SSI
Monoflop time 20 ± 10 µs
Resolution
Single turn up to 16 Bit
Transfer rate 0.1 ... 2 MBit/s
Standard conformity RS 422
Input 1
Input type Selection of counting direction (cw/ccw)
Signal voltage
High 10 ... 30 V or open input
cw descending (clockwise rotation, code course descending)
Low 0 ... 2 V
cw ascending (clockwise rotation, code course ascending)
Input current < 6 mA
Switch-on delay < 10 ms
Input 2
Input type zero-set (PRESET)
Signal voltage
High 10 ... 30 V
Low 0 ... 2 V
Input current < 6 mA
Signal duration min. 100 ms
Switch-on delay < 10 ms
Connection
Cable ∅ 10.2 mm, Radox 9 x 0.5 mm2
Terminal compartment see ordering information
Standard conformity
Degree of protection DIN EN 60529, IP66
Climatic testing DIN EN 60068-2-3, no moisture condensation
Emitted interference EN 61000-6-4:2007/A1:2011
Noise immunity EN IEC 61000-6-2:2019
Shock resistance DIN EN 60068-2-27, 100 g, 3 ms
Vibration resistance DIN EN 60068-2-6, 10 g, 10 ... 2000 Hz
Ambient conditions
Operating temperature -40 ... 70 °C (-40 ... 158 °F)
Storage temperature -40 ... 85 °C (-40 ... 185 °F)
Mechanical specifications
Material
Combination 1 housing: Stainless steel 1.4305 / AISI 303
flange: Stainless steel 1.4305 / AISI 303
shaft: Stainless steel 1.4401 / AISI 316
Singleturn absolute encoder AVS78E Mining
Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
3
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com [email protected].com
[e-mail]

Technical Data
Combination 2 (Inox) housing: Stainless steel 1.4404 / AISI 316L
flange: Stainless steel 1.4404 / AISI 316L
shaft: Stainless steel 1.4401 / AISI 316
Mass approx. 2600 g (combination 1)
approx. 3900 g (combination 2)
Rotational speed max. 3000 min -1
Moment of inertia 180 gcm2
Starting torque ≤ 4 Ncm
Shaft load
Axial 60 N
Radial 80 N
Data for application in connection with hazardous areas
EU-type examination certificate ITS 15 ATEX 18371X
IECEx ITS 11.0060X
Marking 1 I M2 Ex db I Mb
Directive conformity
Directive 2014/34/EU IEC 60079-0:2017 , EN IEC 60079-0:2018 , IEC 60079-1:2014 , EN 60079-1:2014 ,
IEC 60079-31:2013 , EN 60079-31:2014
Singleturn absolute encoder AVS78E Mining
Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
4
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com [email protected].com
[e-mail]

Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
AVS78E Mining
5
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com fa-inf[email protected]
[e-mail]
Singleturn absolute encoder
Description
The Synchronous Serial Interface was specially developed for transferring the output data of an absolute encoder to a control
device. The control module sends a clock bundle and the absolute encoder responds with the position value.
Thus only 4 lines are required for the clock and data, no matter what the resolution of the rotary encoder is. The RS 422 interface
is optically isolated from the power supply.
SSI signal course Standard
SSI output format Standard
• At idle status signal lines "Data +" and "Clock +" are at high level (5 V).
• The first time the clock signal switches from high to low, the data transfer in which the current information (position data (Dn)
and special bit (S)) is stored in the encoder is introduced.
• The highest order bit (MSB) is applied to the serial data output of the encoder with the first rising pulse edge.
• The next successive lower order bit is transferred with each following rising pulse edge.
• After the lowest order bit (LSB) has been transferred the data line switches to low until the monoflop time Tmhas expired.
• No subsequent data transfer can be started until the data line switches to high again or the time for the clock pause Tphas
expired.
• After the clock sequence is complete, the monoflop time Tmis triggered with the last falling pulse edge.
• The monoflop time Tmdetermines the lowest transmission frequency.
SSI output format ring slide operation (multiple transmission)
• In ring slide operation, multiple transmission of the same data word over the SSI interface makes it possible to offer the
possibility of detecting transmission errors.
• In multiple transmission, 25 bits are transferred per data word in standard format.
• If the clock change is not interrupted after the last falling pulse edge, ring slide operation automatically becomes active. This
means that the information that was stored at the time of the first clock change is generated again.
• After the first transmission, the 26th pulse controls data repetition. If the 26th pulse follows after an amount of time greater than
the monoflop time Tm, a new current data word will be transmitted with the following pulses.
If the pulse line is exchanged, the data word is generated offset.
Ring slide operation is possible up to max. 13 bits.
Block diagram Line length
Connection
Signal Cable Terminal compartment
Ground wire green-yellow Grounding terminal
GND (rotary encoder) 1 1
+Ub(rotary encoder) 2 2
Pulse (+) 3 5
Pulse (-) 4 6
Data (+) 5 8
Data (-) 6 7
Preset 7 4
Counting direction 8 3
Interface
12345678
D1, ..., Dn: T = 1/f:
Tm:
Tp:
S:
MSB:
LSB:
Position data
Special bit
Most significant bit
Least significant bit
Duration of period of clock signal  1 MHz
Monoflop time 10 s ... 30 s
Clock pause monoflop time (Tp  Tm)
LSB
MSB
Tp
Tm
T
Clock +
Data + DnDn-1 Dn-2 Dn-3 D2D1S

Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
AVS78E Mining
6
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com fa-inf[email protected]
[e-mail]
Singleturn absolute encoder
Inputs
The selection of the counting direction input (cw/ccw) is activated with 0-level. The zero-set input (PRESET 1) is activated with
1-level.
Type Code
Line length in m Baudrate in kHz
< 50 < 400
< 100 < 300
< 200 < 200
< 400 < 100
Rotary encoder Interface electronics
Receiver
Logic
Clock
generator
Data +
Data -
Clock -
Clock +
zero-set input (PRESET 1)
IN
Filter Logic
Pull down
Input for selection of counting direction (cw/ccw)
IN
Filter Logic
Pull up

Ue

Ue

Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
AVS78E Mining
7
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com fa-inf[email protected]
[e-mail]
Singleturn absolute encoder
Anti-interference measures
The use of highly sophisticated microelectronics requires a consistently implemented anti-interference and wiring concept. This
becomes all the more important the more compact the constructions are and the higher the demands are on the performance of
modern machines.
The following installation instructions and proposals apply for "normal industrial environments". There is no ideal solution for all
interfering environments.
When the following measures are applied, the encoder should be in perfect working order:
• Termination of the serial line with a 120 resistor (between Receive/Transmit and Receive/Transmit) at the beginning and
end of the serial line (e. g. the control and the last encoder).
• The wiring of the encoder should be laid at a large distance to energy lines which could cause interferences.
• Cable cross-section of the screen at least 4 mm².
• Cable cross-section at least 0,14 mm².
• The wiring of the screen and 0 V should be arranged radially, if and when possible.
• Do not kink or jam the cables.
• Adhere to the minimum bending radius as given in the data sheet and avoid tensile as well as shearing load.
Operating instructions
Ordering information
AVS78E– 0 0 – 00
Number of singleturn bits
12 4096
16 65536
Number of multiturn bits
00 Singleturn rotary encoder
Housing material
2Stainless steel 1.4305 / AISI 303
4Stainless steel 1.4404 (AISI 316L)
Output code
BBinary
GGray
Option 2
0Zeroing (preset) and counting direction (F/R)
Exit position
Aaxial
Rradial
Connection type
K2 Cable, 9 strands, 2 m
K5 Cable, 9 strands, 5 m
KR Terminal compartment, 1 cable gland, 1 stopping plug
Flange version
1Clamping flange
2Servo flange
Shaft dimension
01 Shaft Ø10 mm x 20 mm
02 Shaft Ø12 mm x 25 mm
Option 1
EExplosion-proof, standard IP66
Functional principle
SSingleturn
Type of shaft
VSolid shaft
Data format
ASSI interface
Installation

Release date: 2023-02-09 Date of issue: 2023-02-09 Filename: t162847_eng.pdf
AVS78E Mining
8
Germany: [phone]Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: [phone] Singapore: [phone]
www.pepperl-fuchs.com f[email protected].com fa-inf[email protected]
[e-mail]
Singleturn absolute encoder
Every encoder manufactured by Pepperl+Fuchs leaves the factory in a perfect condition. In order to ensure this quality as well as
a faultless operation, the following specifications have to be taken into consideration:
• Avoid any impact on the housing and in particular on the encoder shaft as well as the axial and radial overload of the encoder
shaft.
• The accuracy and service life of the encoder is guaranteed only, if a suitable coupling is used.
• The operating voltage for the encoder and the follow-up device (e. g. control) has to be switched on and off simultaneously.
• Any wiring work has to be carried out with the system in a dead condition.
• The maximum operating voltages must not be exceeded. The devices have to be operated at extra-low safety voltage.
Notes on connecting the electric screening
The immunity to interference of a plant depends on the correct screening. In this field installation faults occur frequently. Often
the screen is applied to one side only, and is then soldered to the earthing terminal with a wire, which is a valid procedure in LF
engineering. However, in case of EMC the rules of HF engineering apply.
One basic goal in HF engineering is to pass the HF energy to earth at an impedance as low as possible as otherwise energy would
discharge into the cable. A low impedance is achieved by a large-surface connection to metal surfaces.
The following instructions have to be observed:
• Apply the screen on both sides to a "common earth" in a large surface, if there is no risk of equipotential currents.
• The screen has to be passed behind the insulation and has to be clamped on a large surface below the tension relief.
• In case of cable connections to screw-type terminals, the tension relief has to be connected to an earthed surface.
• If plugs are used, metallised plugs only should be fitted (such as sub D plugs with metallised housing). Please observe the
direct connection of the tension relief to the housing.
Safety instructions
Please observe the national safety and accident prevention regulations as well as the subsequent safety
instructions in these operating instructions when working on encoders.
If failures cannot be remedied, the device has to be shut down and has to be secured against accidental operation.
Repairs may be carried out only by the manufacturer. Entry into and modifications of the device are not
permissible.
Tighten the clamping ring only, if a shaft has been fitted in the area of the clamping ring (hollow shaft encoders).
Tighten all screws and plug connectors prior to operating the encoder.
Do not stand on the encoder!
Do not remachine the drive shaft!
Avoid impact!
Do not remachine the housing!
Advantage: metalised connector,
shield
clamped with the strain
relief
clamp
Disadvantage: soldering shield on