UOC 40/USC 42 SIL 2

Construction type

Solid shaft (flange), Solid shaft (flange / foot)

Output signals / Interfaces

HTL, PROFIBUS-DP, PROFIBUS-DP with PROFIsafe, PROFINET IO with PROFIsafe, 4-20 mA, Switch output speed, Switch output position

  • Ø 14 mm solid shaft (flange or foot mounting)
  • Heavy-duty housing with directly attached function modules
  • High signal quality for more reliable detection of speed and position
  • Options: Variety of output signals, SIL 2 / PL d certification (USC 42)

The compact all-in-one systems

The compact universal encoder systems U-ONE-(SAFETY-) Compact combine a variety of functions in a rugged housing. They sense and monitor speeds and positions. Consequently, they are ideally suitable for easy upgrades to legacy solutions when the existing cabling is to remain in use or if there is no space available in the switchboard for electronic function modules. The multifunctional construction simplifies their installation and connection. Thanks to direct attachment to the shaft to be monitored the all-in-one systems do not required any additional mechanical components such as transfer gearboxes, transfer couplings or speed step-up gearing; and on top of that they offer greater accuracy. They are optionally certified for safety applications up to SIL 2 / PL d.


Supply voltage15-27 VDC
Resolution-Multi-turn 15 bit (32768 rotations)
-Single-turn 13 bit (8192 steps per rotation)
Switching outputsSpeed 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/InterfacesBasic 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 rotationSolid 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 shaftsSolid shaft (B5, B35) / Ø 14 mm with feather key
Device temperature range-25 °C to +70 °C
Degree of protectionIP66
WeightApprox. 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 certificatesFor 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