Folding drive arm suitable for Fermator ECC busmatic doors. The drive arm apart from connecting the movement of the driveshaft to the movement of the door panels also contains a microswitch that operates when an obstruction is detected in the opening and closing movement of the doors. The microswitch when in its rest position is N/C.
This drive arm is suitable for clear openings of 550mm which is the distance between the door panels when the doors are fully closed. Another clear indication of which door operator this drive arm is used on is by measuring the overall width of the operator (also known as ENTRANCE) which should be 600mm for this drive arm to be selected.