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Singleturn absolute rotary encoder AVS78E

  • Up to 16 Bit singleturn
  • ATEX approval
  • IECEx approval
  • Flameproof enclosure
  • Removable connection cap
  • Galvanically isolated RS 422 interface

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  AVS78E

General specifications
Detection typephotoelectric sampling
Device typeSingleturn absolute rotary encoder
Functional safety related parameters
MTTFd210 a
L107.7 E+9 at 3000 rpm
Electrical specifications
Operating voltage10 ... 30 V DC
No-load supply currentmax. 90 mA
Linearity± 2 LSB at 16 Bit, ± 1 LSB at 13 Bit, ± 0,5 LSB at 12 Bit
Output codeGray code, binary code
Code course (counting direction)see input 1
Interface typeSSI
Monoflop time20 ± 10 µs
Single turnup to 16 Bit
Transfer rate0.1 ... 2 MBit/s
Standard conformityRS 422
Input 1
Input typeSelection of counting direction (cw/ccw)
Signal voltage
High10 ... 30 V or open input
cw descending (clockwise rotation, code course descending)
Low0 ... 2 V
cw ascending (clockwise rotation, code course ascending)
Input current< 6 mA
Switch-on delay< 10 ms
Input 2
Input typezero-set (PRESET)
Signal voltage
High10 ... 30 V
Low0 ... 2 V
Input current< 6 mA
Signal durationmin. 100 ms
Switch-on delay< 10 ms
Cable∅ 10.2 mm, Radox 9 x 0.5 mm2
Terminal compartmentsee ordering information
Standard conformity
Degree of protectionDIN EN 60529, IP66
Climatic testingDIN EN 60068-2-78 , no moisture condensation
Emitted interferenceEN 61000-6-4:2007/A1:2011
Noise immunityEN 61000-6-2:2005
Shock resistanceDIN EN 60068-2-27, 100 g, 3 ms
Vibration resistanceDIN EN 60068-2-6, 10 g, 10 ... 2000 Hz
Approvals and certificates
IECEx approval
Equipment protection level GbIECEx ITS 15.0061X
ATEX approval
Equipment protection level GbITS 15 ATEX 18372X
Ambient conditions
Operating temperature-40 ... 70 °C (-40 ... 158 °F)
Storage temperature-40 ... 85 °C (-40 ... 185 °F)
Mechanical specifications
Combination 1housing: anodized aluminum
flange: anodized aluminum
shaft: Stainless steel 1.4404 / AISI 316L
Combination 2 (Inox)housing: Stainless steel 1.4404 / AISI 316L
flange: Stainless steel 1.4404 / AISI 316L
shaft: Stainless steel 1.4404 / AISI 316L
Massapprox. 2600 g (combination 1)
approx. 3900 g (combination 2)
Rotational speedmax. 3000 min -1
Moment of inertia180 gcm2
Starting torque≤ 4 Ncm
Shaft load
Axial60 N
Radial80 N
General information
Use in the hazardous areasee instruction manuals


ECLASS 13.027270502
ECLASS 12.027270502
ECLASS 11.027270502
ECLASS 10.0.127270502
ECLASS 9.027270502
ECLASS 8.027270502
ECLASS 5.127270502
ETIM 9.0EC001486
ETIM 8.0EC001486
ETIM 7.0EC001486
ETIM 6.0EC001486
ETIM 5.0EC001486
UNSPSC 12.139121527

Details: AVS78E


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.

Product Documentation: AVS78E

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF167 KB

Approvals: AVS78E

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
EU Intertek ATEX Category (2) G DITS15ATEX18372XALLPDF931 KB
Worldwide Intertek II 2GDIECEx ITS 15.0061XALLLINK---
Declaration of Conformity
EU Declaration of Conformity (P+F)TDOC-2495DENGENGPDF268 KB