All RolloTron devices have integrated obstacle detection and motor monitoring. Obstacles are detected by the devices using a belt monitoring system. In the devices, the belt runs past a small deflection roller and rotates it. There is a magnet in this roller, which is detected by a sensor. If the roller does not rotate for any reason, the motor stops.
RolloTron devices CANNOT be operated without a belt for this reason.
The motor is monitored electronically. If the RolloTron is under extreme load, e.g., due to a blocked shutter, the electronics detect this condition and switch off the motor. In this case, check whether the roller shutter moves smoothly and remove any blockages if necessary.