Extremely robust singleturn absolute encoders for loopers

AL... 40

ALS 40, ALPA 40
  • 14 mm solid shaft (flange or foot mounting)
  • Service life extended many times under the most extreme of operating conditions
  • High signal quality, up to 16 bit singleturn
  • Option: Incremental output
Absolute encodersIncremental encoders
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Singleturn absolute encoders for rough conditions

The singleturn absolute encoders AL...40 for loopers are especially designed for the most extreme conditions with shock loads up to 450 g. The encoders are mostly deployed in roll stands in hot rolling mills between the roll housings where they are subject to high levels of energy. The singleturn absolute encoders supply precise information about the angle position of the looper, which is used for the highly dynamic feedback speed control of the rollers. At the same time singleturn absolute encoders AL...40 achieve a service life that is many times longer than that of other models. Lubricated with special grease their ball bearings offer an approximately 40 per cent higher load rating.

Technical Data

Supply voltage

12-30 VDC


Singleturn max. 16 bit (65536 steps per rotation)

Number of interfaces1
Interface/Product Name
  • SSI (Gray; Binär; Inkremental)  |  ALS 40
  • HTL,TTL  |  FGL 40
Maximum rotation

Solid shaft: up to 4000 rpm

Electrical connection
  • Terminal strip in a terminal box
  • Fixed cable
Construction type / Ø shafts

Solid shaft (B5, B35): Ø 11 mm, Ø 14 mm with feather key

Device temperature range

-25 °C to +100 °C

Degree of protection

IP66 / IP67


Approx. 3.5 kg

Device options

Preset function (preset 1000)

Mechanical options
Special features and certificates
  • Ball bearings with 40% higher load rating, strengthened shaft
  • UL/CSA



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