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Stromag Series 51 Geared Cam Limit Switches for High-Speed Commercial Overhead Doors
Many of the commercial overhead doors on the market today move up and down at
very high speeds of more than 100"/sec. Limit switches are required to ensure that
the doors open fully for access and close completely for proper sealing. Overhead door
manufacturers prefer to use rotary limit switches on these door applications due to their
easily adjustable, precise stopping points.
Durable Stromag limit switches are a popular choice for these types of commercial
doors because they are able to handle high drive speeds and frequent stops. The
switches also act as a safety feature. Without a limit switch, an overhead door cannot
function properly causing potential damage to the door, material and equipment.
Easy-to-use limit switches are typically the first choice for operation and maintenance
personnel, compared to more complicated electronic controls.
The Stromag Series 51 limit switch, with a planetary gear and modular principle, is
the perfect solution for use on commercial overhead doors, including high-speed
applications. The switch provides a wide range of gear ratios (up 16,000 turns), a large
number of switching contacts, and easily adjustable cam discs. The combination of
these features significantly improves the quality and handling of the door.
The Series 51 limit switch is available with different environmental protected housings
(including IP 66). Units are available with plastic or metal housings. Stromag limit
switches can be provided with integrated electronics and can be customized to meet
more advanced application requirements.
Highlights
- Precise stopping of
fast-moving doors
- Multiple gear ratios
from 4.1:1 up to 16,000:1
- Easily adjustable limits
using separate adjustment
screws for each contact
- No loss of switching point
due to form fit connections
- Standard IP 65 or IP 66
enclosures
- Complies with CE, UL and
CSA International
standards