• Siemens SIRIUS 3UG5651 / 3UG5851 Speed Monitoring Relays
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Siemens SIRIUS 3UG5651 / 3UG5851 Speed Monitoring Relays

Siemens SIRIUS 3UG5651 / 3UG5851 Speed Monitoring Relays

Digitally adjustable SIRIUS 3UG5 speed monitoring relays that monitor motor drives for overspeed and underspeed with a sensor.

Key features

  • Speed monitoring by period duration measurement
  • Detects overspeed, underspeed and range violations
  • Auxiliary voltage 24-240 V AC/DC or 24 V DC (IO-Link)
  • Versions for safety applications
  • Screw or spring-loaded (push-in) terminals

Specifications

Brand Siemens
Product line SIRIUS 3UG5
Function Speed monitoring
Setting Digital
Mounting DIN rail, stand-alone
Source Siemens Catalog IC 10 · 2026, p. 999
3UG5651-1CW30 Version: Standard | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Screw
3UG5651-2CW30 Version: Standard | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Spring-loaded (push-in)
3UG5651-1CW31 Version: Safety applications | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Screw
3UG5651-2CW31 Version: Safety applications | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Spring-loaded (push-in)
3UG5851-1AA40 Version: IO-Link | Supply: 24 V DC | Contacts: 1 CO | Connection: Screw
3UG5851-2AA40 Version: IO-Link | Supply: 24 V DC | Contacts: 1 CO | Connection: Spring-loaded (push-in)
Monitoring RelaysSiemens
6 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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Siemens SIRIUS 3UG5651 / 3UG5851 Speed Monitoring Relays

Brand Siemens·Monitoring Relays

Available part numbers (6)

3UG5651-1CW30, 3UG5651-2CW30, 3UG5651-1CW31, 3UG5651-2CW31, 3UG5851-1AA40, 3UG5851-2AA40

How to order

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Product codes & specifications
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Product codeSpec
3UG5651-1CW30Version: Standard | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Screw
3UG5651-2CW30Version: Standard | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Spring-loaded (push-in)
3UG5651-1CW31Version: Safety applications | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Screw
3UG5651-2CW31Version: Safety applications | Supply: 24 ... 240 V AC/DC | Contacts: 2 CO | Connection: Spring-loaded (push-in)
3UG5851-1AA40Version: IO-Link | Supply: 24 V DC | Contacts: 1 CO | Connection: Screw
3UG5851-2AA40Version: IO-Link | Supply: 24 V DC | Contacts: 1 CO | Connection: Spring-loaded (push-in)

Need a different model, or a part not listed here? Send us your parts list →

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