U-ONE Generation II (Compact) - universal encoder system

UOC 40 / USC 42

  • A modular encoder system with attached function modules in a robust housing 
  • Position and speed monitoring, both optionally available with safety certification SIL 2 / PL d
  • Signal transmission via copper cable
  • Resolution: absolute 13 bit singleturn / 15 bit multiturn and incremental up to 4096 ppr
Electronic position switchesAbsolute encodersIncremental encodersOverspeed switchesAnalog signal
Online-Request Contact

Universal encoder system - compact

The compact U-ONE(-SAFETY)-Compact universal encoder systems for speed and position monitoring improve performance by making optimal use of permitted speed ranges and fast and precise positioning. The encoder systems combine different functions in a robust housing and are therefore ideal for the simple modernization of existing solutions when continuing to make use of legacy cabling or when there is no space in the switchboard for electronic function modules. 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 simple parameter input and preset function after maintenance work ensure high system availability. The encoder systems are optionally available with all components certified for use in safety applications with requirements up to SIL 2 / PL d.

Technical Data

Supply voltage

15-27 VDC

  • Multiturn 15 bit (32768 rotations)
  • Singleturn 13 bit (8192 steps per rotation)
Switching outputs

Speed and position switch modules (NO contact 5…230 V / 0.5 A AC/DC):

  • Speed switch (0.5-2520 rpm) 
  • Position switch (max. 32768 rotations)
  • Failure switch

Further switching functions on request

Signal outputs/Interfaces

Basic unit (SCU):

  • Current output 4-20 mA (without SIL)
  • Incremental output 1024 / 4096 pulses configurable (without SIL)
  • Status output and error output

Absolute value interface (bus module) UOC 40:

  • PROFIBUS-DP (without SIL): Resolution: 12 bit singleturn / 12 bit multiturn

Absolute value interface (bus module) USC 42:

  • PROFIsafe via PROFIBUS-DP (SIL 2 / PL d): Resolution: 13 bit singleturn / 15 bit multiturn
    (PROFIBUS-DP: RS485, baud rate 9.6 kbit/s...12 Mbit/s, device address 1-99 possible)
  • PROFIsafe via PROFINET IO (SIL 2 / PL d)
    (PROFINET IO: Transmission rate 100 Mbit/s)
Maximum rotation

Solid shaft: up to 2800 rpm

Electrical connection
  • Base module: Terminal box (copper cable) + USB interface
  • Switching module: Terminal box (copper cable)
  • Termination module: Fieldbus box
Construction type / Ø shafts

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

Device temperature range

-25 °C to +70 °C

Degree of protection



Approx. 3.6 kg + 0.8 kg/module

Device options
  • Modularly extendable (compact combination of different electronic function modules)
  • SIL 2 (DIN EN 61508); PL d (DIN EN ISO 13849); Category 3 (DIN EN ISO 13849) with USC 42
Mechanical options
  • Additional foot (solid shaft construction type)
  • MI: Saliferous environment
Special features and certificates

For USC 42: SIL 2 (DIN EN 61508); PL d (DIN EN ISO 13849); Category 3 (DIN EN ISO 13849),  
system-wide two channel architecture incl. internal cross-checking



We look forward to taking on your challenges.


Information about privacy concerns can be found in our Privacy Policy