E. Dold & Söhne GmbH & Co. KG

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E-Mail: dold-relays@dold.com

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UG 6946

Standstill monitor

UG 6946


Time range

Auxiliary voltage

Response value

Terminal type

Approvals and Markings


  • 0068410
  • UG6946.02PS/001/61 20-400mV 0,2-6s
The safe sensorless UG 6946 standstill monitor is suitable for detects the standstill of 3-phase... more

Product description

The safe sensorless UG 6946 standstill monitor is suitable for detects the standstill of 3-phase and 1-phase electric motors independent of the direction of rotation. This means sensors such as encoders or proximity switches are not required. The standstill monitor measures the induced voltage of the coasting motor. If the induced voltage approaches 0, this means motor standstill for the device and the output relay is activated. With a width of only 22.5 mm, the UG 6946 can be accommodated in the control panel even under tight space conditions allowing easy retrofitting. For the implementation of different operating modes, the standstill monitor also offers the possibility of bridging the standstill monitoring (muting).

Technical specifications

Width: 22,5 mm
Classification: Sensorless
Cat. / PL acc. to EN ISO 13849-1: 4/e
SIL CL acc. to IEC/EN 62061: 3
Nominal voltage: DC
Thermal current Ith max.: 5 A
1- / 2-channel: 2
Measuring motor voltage max.: 690 V
Forcibly guided output contacts max.: 2 NO contacts, 1 NC contact
Type: UG 6946


  • Without sensor and safe
  • Fast reaction time
  • Easy to retrofit
  • Combined with Interlock SAFEMASTER STS
  • Protection against manipulation by sealable transparent cover over setting switches


  • According to
    - Perf. Level (PL) e and category 4 to EN ISO 13849-1, EN 61800-5-2
    - SIL-Claimed Level (SIL CL) 3 to IEC/EN 62061
    - Safety Integrity Level (SIL) 3 to IEC/EN 61508, IEC/EN 61511 and EN 61800-5-2
  • Safe standstill detection on 3- and single-phase motors
  • No external sensors necessary
  • Independent of direction
  • Broken wire detection
  • Forcibly guided safety contacts:
    - 2 NO contacts for AC 250 V
    - 1 NC contact for DC 24 V
  • Adjustable voltage setting
  • Adjustable standstill time delay
  • LED indicators for standstill, event of line breakage and operation voltage
  • Suitable for operation with inverters
  • Removable terminal strips:
    - UG 6946 PS: plug in screw terminals
    - UG 6946 PC: plug in cage clamp terminals
  • Variant /_ _1:
    - Possibility of bridging the speed monitoring (muting)
  • Width: 22.5 mm