Singleturn absolute rotary encoders for heavy-duty usage

AS... 40 / AS...H 40

ASE 40 / ASEH 40, ASS 40 / ASSH 40, ASSI 40 / ASSIH 40, ASPA 40 / ASPAH 40
  • Hollow shafts up to Ø 20 mm, solid shafts up to Ø 14 mm (flange or foot mounting)
  • Heavy-duty design, other encoder can be attached
  • High signal quality, up to 16 bit singleturn, variety of interfaces
  • Options: Second interface, additional incremental outputs
Absolute encodersIncremental encoders
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Versatile absolute rotary encoders

The rugged singleturn absolute rotary encoders AS...40 and AS...H 40 can be deployed in a wide variety of applications to detect positions in steel and rolling mills, in mining operations as well as in ports and crane systems. The absolute rotary encoders supply precise information about the position of the shaft. The encoders are installed for position measuring as well as positioning tasks. Thanks in particular to the extremely rugged foot construction it is possible to easily attach additional encoders to the second shaft end.

Technical Data

Supply voltage

12-30 VDC


Singleturn max. 16 bit (65536 steps per rotation)

Number of interfaces1 or 2
Interface/Product Name
  • EtherCAT  |  ASE 40 / ASEH 40
  • SSI  |  ASS 40 / ASSH 40
  • SSI-Inkremental  |  ASSI 40 / ASSIH 40
  • Parallel  |  ASPA 40 / ASPAH 40
Maximum rotation
  • Solid shaft: up to 6000 rpm
  • Hollow shaft: up to 4000 rpm


Electrical connection
  • Terminal strip in a terminal box
  • Fixed cable
  • 12-pole round connector Burndy
  • 12-pole round connector M23
  • 15-pole industrial connector
  • Fieldbus box
Construction type / Ø shafts
  • Solid shaft (B5, B35) / Ø 11 mm, Ø 14 mm with feather key
  • Hollow shaft / Ø 20 mm with keyway; Ø 16 mm with clamp
Device temperature range
  • -25 °C to +85 °C
  • -40 °C to +85 °C
  • 0 °C to +70 °C
Degree of protection

Up to IP66 / IP67


Approx. 4.5 kg

Device options
  • Additional single incremental output
  • Additional double incremental output with reference pulse in second terminal box
Mechanical options
  • Second shaft end with B14 flange for attachments (solid shaft construction type only)
  • Additional foot (solid shaft construction type only)
  • Isolated ball bearing (hollow shaft construction type only)
  • MI: Saliferous environment
  • MS: Wet areas in rolling mills
  • Hollow shaft devices: Torque bracket (on request)
Special features and certificates




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