System Solution – Universal Encoder System


System solution

U-ONE Generation I – universal encoder system

System solution U-ONE

  • A modular encoder system with electronic function modules in the switchboard
  • Position and speed monitoring, optionally available with safety certification SIL 2 / PL d (only speed monitoring)
  • Interference-free FOC signal transmission via two fiber optic cables
  • Resolution: absolute 12 bit singleturn / 12 bit multiturn and incremental of 1024 ppr

Electronic position switches Absolute encoders Incremental encoders Overspeed switches

Universal encoder system – fiber optics

The proven modular universal encoder systems in the first generation of U-ONE reliably determine and monitor speed and position. The LWL (FOC) encoder systems are comprised of a basic unit and function modules in the switchboard. They are ideal for applications in which signal transmission via fiber optic cable is possible and there is sufficient space in the switchboard. The encoder systems transmit signals over long distances of up to 1,000 meters with no interference using two fiber optic cables. The encoder system solutions are suitable for use both in new plants and as a modernization solution. The all-in-one encoder systems are directly mounted onto the shaft that needs to be monitored. They therefore require no additional mechanical components such as distribution gears, distribution couplings or speed increasing gears and additionally offer higher accuracy. The encoder systems are optionally available as certified for safe speed monitoring up to SIL 2 / PL d.

Technical Data


Supply voltage 12-30 VDC
  • Multiturn 12 bit (4096 rotations)
  • Singleturn 12 bit (4096 steps per rotation)
Switching outputs Via function module in the switchboard:

  • Speed switch (NO contact)  |  UO-EM-EGS 4 / UO-EM-EGS 41 (SIL 2)
  • Position switch (changeover contact)  |  UO-EM-ERC
Signal outputs/Interfaces Via function module in the switchboard:

  • Incremental output 1024 pulses (HTL/TTL)  |  UO-EM-FG4
  • CAN bus  |  UO-EM-AMC
  • SSI  |  UO-EM-AMS
  • Modbus TCP  |  UO-EM-AME/M
Maximum rotation
  • Solid shaft: up to 3000 rpm
  • Hollow shaft: up to 2000 rpm


Electrical connection
  • Basic unit: Terminal box with 2x ST connectors FOC (50/125 µm or 62.5/125 µm) + clamp (supply voltage)
  • Function module in the switchboard: Internal bus connection / terminal strip, connector
Construction type / Ø shafts
  • Solid shaft (B5, B35) / Ø 11 mm, Ø 14 mm with feather key
  • Hollow shaft / Ø 20 mm with keyway
Device temperature range -25 °C to +85 °C
Degree of protection Up to IP66
Weight Approx. 2.5 kg (basic unit only) + weight of the individual modules
Device options Via function module in the switchboard:

  • Basic decoder module: UO-EM-D2 / UO-EM-D41 SIL 2
  • Speed switch module: UO-EM-EGS 4 / UO-EM-EGS 41 SIL 2
  • Position switch module: UO-EM-ERC
  • Incremental encoder module: UO-EM-FG 4
  • Absolute encoder module: UO-EM-AMC / AMP / AMS / AME-M
Mechanical options
  • Additional foot (solid shaft construction type)
  • Isolated ball bearing (hollow shaft construction type only)
  • MI: Saliferous environment
  • Hollow shaft devices: Torque bracket (on request)
Special features and certificates
  • UOM 41L and modules UO-EM-D41, UO-EM-EGS 41: SIL 2 (DIN EN 61508); PL d (DIN EN ISO 13849)
  • UL/CSA



UOL 40 / USL 42 / UOC 40 / USC 42 (de/en)


Simplifying Cranes (de/en)


UOM 4L (en)
Operating and assembly instructions


UOM 41L (en)
Operating and assembly instructions


UOM 4L / UOM 41L basic unit + module (de/en)

Software i


UO EM EGS41 PRO (de/en)

Software i


UOM 4L / UOM 41L PROFIBUS GSD Driver (de/en)


UOM 4L / UOM 41L CANOPEN Driver (de/en)

Software i


SIL 2 PL d


UL / CSA (de/en)