6) control devices and position (Limit Switch) for the maximum opening position control must open up, at least 2 digits and 1 to 2 for normal usage, maintenance and emergency.
6) Control & Positioning (Limit Switch) for controlling the position opened up. Open to set up at least two positions, one for regular use and two for emergency maintenance.
6) and control position Limit Switch) for position control on maximum. To determine distance open not less than the maximum 2 position 1 to normal use 2 to maintenance and emergency.