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EGS 40

Electronic overspeed switch

The overspeed switch EGS 40, which functions independent of the encoder, fulfills the highest work safety and accident prevention requirements for operating statuses such as "safe standstill", "safe limited speed" as well as those applicable when carrying out maintenance procedures on live components and devices. The integrated speed sensor generates a voltage proportional to the speed, which is processed by an evaluation unit. The actual speed is continuously compared with the programmed limit speeds stored in the non-volatile memory. The evaluation unit triggers the corresponding switch if the limit speed is reached. The EGS 40 replaces its predecessor model EGS 4; it is available as a flange/foot mounted version for switching speeds from 0.63 rpm.


Shaft diameter

11 mm or 14 mm

Supply voltage

12 - 30 VDC

100 - 240 VAC

Number of switching speeds

2 or 4

Switching speed ranges

0.63 to 300 rpm

1.25 to 600 rpm

2.5 to 1200 rpm

5 to 2400 rpm

10 to 4800 rpm

Setting range

Programmable across the whole switching speed range

Programming interface

Mini USB

Switching voltage

2 - 30 VDC/max. 300 mA (optional: 30 - 230 V AC/DC / max. 300 mA)

Switching function

NC contact

Programmable functions

Monitor switching function

Monitor underspeeds

Direction of rotation switch

Switching hysteresis (min. 10 %)

Switch delay (0 - 300 ms)

Device temperature range

-25 °C to +85 °C (optional: -40 °C to +85 °C)

Degree of protection

up to IP66 / IP67


approx. 3.5 kg

Operating and Assembly Instructions (PDF, 3.8 MB) Download
Catalog - EGS 2 / EGS 40 / EGS 41 (PDF, 1.08 MB) Download
Inquiry form - Overspeed switch (PDF, 151 KB) Download
Software EGS4x Pro (ZIP, 5.18 MB) Download

Version: 4 Rev 4.4

For Microsoft Windows® 98, NT, 2000, XP, Vista, 7

Case Study - Inclined converter hoist, rolling mill (PDF, 124 KB) Download
Case Study - RTG hoist, cranes (PDF, 1.19 MB) Download


Standard dimension drawings and connection diagrams are provided in the Operating and Installation Instructions. We would be pleased to send you individual variations as well as DXF/STEP files on request.