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3.2.3
Function
The DFA is designed to operate without power, like a normal door closer. It can be opened easily by
hand and closes with the energy stored in the spring, damped by the motor acting as a generator.
If the drive is connected to the mains, the opening and closing movements are supported by the
motor.
In the standard "Automatic" operating mode, the door system opens when a triggering device
responds to approaching persons or objects. After the door hold time has elapsed, the door closes
unless a new opening impulse is given.
The following functions are exclusively for the safety of the user:
Obstacle detection: If the door hits an obstacle when opening, it stops immediately and saves the
position of the collision. During the hold open time, the operator briefly attempts to reach the open
position. Once the hold open time has elapsed, the door closes and the obstacle position is passed
over more slowly the next time it opens. This prevents another hard impact.
Swing doors that are equipped with a monitored safety sensor in the opening direction (SIO) open
after a collision at the programmed opening speed and not with a creep speed.
Reversing: If the door hits an obstacle when closing, a reopening is initiated immediately (reversing).
The obstacle position is saved in the door operator and this position is approached gently the next
time the door is closed.
Operation: Three operation modes can be set using the built-in toggle switch BDI:
– Manual operation
– Automatic
– Continuouyly open
Primary / Secondary: With the Primary / Secondary application, the opening and closing sequence
of double-leaf doors is controlled electronically. The operation of a Primary / Secondary system can
only be carried out via the toggle switch BDI of the Primary drive. This switch position also affects the
Secondary drive unit.
3.3
Types of arm
Power is transmitted from the operator to the door leaf by means of an arm. Depending on the
installation situation, a standard arm or a sliding arm may be suitable. Standard arms are available in
various lengths to adjust the recess depth. Varying over heights are adjusted with the lever sockets
(shaft extensions)..
Standard arm
Normal arm SG1
BAL_DFA_70_EN_1V0_REC_102-127109270
Standard arm PUSH-20-230
3
Description
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