Robust multiturn absolute encoders

AM... 40 / AM...H 40

AMP 40 / AMPH 40, AMN 40 / AMNH 40, AMS 40 / AMSH 40, AMSI 40 / AMSIH 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 and 12 bit multiturn, variety of interfaces
  • Options: Second interface, additional incremental outputs
Absolute encodersIncremental encoders
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Robust multiturn absolute encoders

The rugged multiturn absolute encoders AM...40 and AM...H 40 can be deployed in a wide variety of applications to detect positions and rotational speeds in rolling and steel mills, in mining operations as well as in ports and crane systems. The multiturn absolute encoders supply precise information about the position of the shaft and the number of rotations. For example, the encoders are installed in hoisting gear applications to be able to determine the exact position at all times. 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

  • Multiturn max. 12 bit (4096 rotations)
  • Singleturn max. 16 bit (65536 steps per rotation)
Number of interfaces1 or 2
Interface/Product Name
  • PROFIBUS-DP  |  AMP 40 / AMPH 40
  • DeviceNet  |  AMN 40 / AMNH 40
  • SSI  |  AMS 40 / AMSH 40
  • SSI-Inkremental  |  AMSI 40 / AMSIH 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: Ø 11 mm or 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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