Chain wheel drive motor
Elero rolling door drives are maintenance free threephase AC motors with a worm drive gearbox. In the event of a power failure or a defect the drive can be operated manually by means of an emergency hand crank or chain depending upon the particular configuration (not for long-term use). All electrical wires to the motor are equipped with plug-in connections.
Chainwheel drives WKM/DKM (ZE)
An in-built safety brake is not permitted to be the safety device when used with a chainwheel drive. In accordance with BG Guideline ZH 1/494 an independently functioning safety brake must be used (for selection see technical data for safety brakes).