Construction type

Solid shaft (flange), Hollow shaft

Output signals / Interfaces

Switch output speed

  • Monitors overspeed and standstill
  • Hollow shafts (isolated ball bearings) up to Ø 17 mm, solid shaft Ø 11 mm (flange mounting)
  • Nonwearing semi-conductor switch (NO contact): one switching output set ex works
  • Switching capacity up to 30 VDC and 0.5 A

The preset speed monitors

The electronic speed switches monitor the factory-set speed with high switching accuracy, including low operating speeds. Alternatively, they can be used as standstill monitors. As a consequence, the speed switches play their part in system and personnel protection. They are installed on motors, for example in cranes, in mining operations as well as in rolling mills and more.


Supply voltage12-30 VDC
Number of switches1
Switching voltage0-30 VDC
Switching speed range1-6300 rpm with solid shaft
1-5400 rpm with hollow shaft
Switching function– Speed monitoring: Opens when switching speed exceeded
– Standstill monitoring: Opens when angle of rotation is altered
– Switching points set ex-works
Maximum rotationUp to 7000 rpm with solid shaft
Up to 6000 rpm with hollow shaft
Electrical connection– Terminal strip in a terminal box
– Fixed cable (0.6-3 m)
Construction type / Ø shafts– Solid shaft (B5) / Ø 11 mm with feather key
– Hollow shaft (isolated bearings) / Ø 12 mm, Ø 16 mm with clamp, Ø 17 mm with taper 1:10
Device temperature range-25 °C to + 85 °C
Degree of protectionIP66
WeightApprox. 2 kg
Device optionsIncremental output: See FG 2 with option S
Mechanical optionsHollow shaft devices: Torque bracket (on request)
Special features and certificatesUL/CSA