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Absolute rotary encoder with hollow shaft and industrial Ethernet
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The absolute optical multiturn rotary encoder WH5850 is particularly high-resolution and designed for time-critical applications. Thanks to the large selection of Industrial Ethernet interfaces, such as PROFINET (also with PROFIdrive profile), EtherNet/IP and EtherCAT, as well as short reaction times and 100% magnetic insensitivity, it is ideally suited for use in drive technology, bearing technology and factory automation. Thanks to the support of the latest PROFINET, EtherNet/IP and EtherCAT functions, it offers easy integration and optimum system availability!

  • absolute optical encoder
  • high-precision and up to 19 bit single-turn resolution
  • PROFINET IO, EtherNet/IP, EtherCAT interfaces
  • robust bearing construction as well as high shock and vibration resistance
  • 100% magnetic insensitivity
  • fast commissioning and high system availability
  • Industry 4.0 ready

Mechanical data

Feature Technical data Additional information
Shaft rustproof stainless steel  
Flange Aluminum  
Housing Aluminum  
Speed ≤9000 rpm transient for ≤10 min., with EPN PROFINET IO
  ≤6000 rpm continuous operation, with EPN PROFINET IO
  ≤6000 rpm transient for ≤10 min., with EIP EtherNet/IP, up to 70° C
  ≤4000 rpm continuous operation, with EIP EtherNet/IP, up to 70° C
Moment of inertia ≤6 x 10-6 kgm2  
Starting torque <0.01 Nm at 20° C
Shaft load rating 80 N radial
  40 N axial
Mounting type stator coupling mounting type DS1
  spring element mounting type DS2
Weight ~0.45 kg  

Electrical data

PROFINET IO interface

Feature Technical data Additional information
Operating voltage 10 … 30 V DC reverse-polarity protected
Current consumption ≤250 mA  
Power input ≤2500 mW without load
Parameter storage 1010 cycles also applies to calibration operations
Status display 5 LEDs device status/bus status
Bus connection PROFINET IO, RT Class 3 (IRT), Conformance Class C, Application Class 6, Encoder Class 4, Netload Class III EPN
Type of connection 1x M12 connector (A-coded) 4-pole, 1x pin
  2x M12 connector (D-coded) 4-pole, 2x sockets

EtherNet/IP interface

Feature Technical data Additional information
Operating voltage 10 … 30 V DC reverse-polarity protected
Current consumption ≤250 mA  
Power input ≤2500 mW without load
Parameter storage 1010 cycles also applies to calibration operations
Status display 5 LEDs device status/bus status
Bus connection EtherNet/IP EIP
Type of connection 1x M12 connector (A-coded) 4-pole, 1x pin
  2x M12 connector (D-coded) 4-pole, 2x sockets

System data

Feature Technical data Additional information
Scanning optical  
Resolution 19 bit at EPN PROFINET IO scalable, default: 8192 (13 Bit)
  16 bit at EIP EtherNet/IP scalable, default: 8192 (13 Bit)
System accuracy ±0.0139° typical, at 23° C
  ±0.0194° maximum, at 23° C
Repeat accuracy 1 LSB  
Measuring range 16777216 revolution(s) 24 bit, with EPN PROFINET IO, default: 4096 (12 bit), scalable only via overall resolution
  65536 revolution(s) 16 bit, with EIP EtherNet/IP, default: 4096 (12 bit), scalable only via overall resolution

Ambient conditions

Feature Technical data Additional information
Ambient temperature -40 … 80 °C  
Storage temperature -40 … 80 °C  
Relative humidity 95 % condensation inadmissible
EMC DIN EN 61326-1 immunity requirement of industry
  DIN EN 61000-4-2, -3, -6, -8 interference resistance / immission
  DIN EN 61000-4-4 burst
  DIN EN 55011 Class A radiation emission / radio interference suppression
Protection category IP65 EN 60529
  IP67 EN 60529
Shock resistance 2500 m/s2, 6 ms EN 60068-2-27
Vibration resistance 100 m/s2, 55 … 2000 Hz EN 60068-2-6

Ordering table

Feature Order data Specifications Additional information
Interface/protocol

AEIP

 EtherNet/IP  

EPN

 PROFINET IO  
 
Number of revolutions

B1

 singleturn  

65536

 16 bit, multiturn  

16777216

 24 bit, multiturn  
 
Hollow shaft/diameter

C10

 ø10 mm  

12

 ø12 mm  

14

 ø14 mm  

15

 ø15 mm  

3/8

 ø3/8 in  

1/2

 ø1/2 in  
 
Mounting type

DDS1

 stator coupling  

DS2

 spring element  
 
Protection category

EIP65

 IP65  

IP67

 IP67  
 

Ordering key

WH5850-A-B-C-D-E-S

For information, click here!

Data sheet

Pin assignment

EtherCAT, EtherNet/IP

Signal PIN
Tx+ 1
Rx+ 2
Tx- 3
Rx- 4

connections

WH5850 connections

operating voltage

Signal PIN
+UB 1
nc 2
GND 3
nc 4
  PROFINET IO EtherNet/IP
1 LED: link 2 LED: link 2
2 LED: bus error LED: module status
3 LED: collection error LED: network status
4 LED: ENC LED: encoder
5 LED: link 1 LED: link 1
6 power power
7 link 2 port 2
8 link 1 port 1
9   rotary switch

Industry 4.0

In most cases, data exchange with the absolute rotary encoder is limited to the exchange of process data. In addition to the process data, intelligent industrial Ethernet rotary encoders provide additional information that can be evaluated for condition monitoring up to predictive maintenance:

Process Data Smart Value Smart Function
Actual position Temperature Condition monitoring
Speed Limit speed Application overload
  Operation hours counter Operating time
  Electronic type label Asset management
    Web server (EPN, EIP)
Scope of delivery
  • Quick Start Guide
  • WH5850