Record DFA 127 - Construction and Function; Construction; Functions

Manual DFA 127 Full Power 12/2006 Rev. B Page 5 of 55
4 Construction and Function
4.1 Construction
Key to illustration:
1 Mains connection terminals 9 Slide switch S1 (rotation direction)
switch
2 Fine-wire fuse 10 Multifunctional switch MF on STG
3 NET power supply 11 Closing spring
4 ATM drive unit 12 Vision panel, adjust. spring tension
5 STG control unit 13 Adjusting screw for spring tension
6 STG connection terminals 14 Connectors for arms (both sides)
7 Motor print MOT 15 Standard switch BDI
8 ATE drive unit terminals 16 Status signal and Reset button
4.2 Functions
The record DFA 127 has been designed to close without electrical power. It can be
easily opened by hand and closes using the energy stored in the spring, with the
motion damped by the motor acting as a generator.
If the door operator is connected to the mains power, the opening and closing
movements will be assisted by the motor.
The following functions are provided exclusively for the safety of the user:
Collision detection: If the door strikes an obstacle while opening, it stops imme-
diately and stores the position of the impact. During the time delay, the drive briefly
tries to reach the open position. Once the time delay has expired, the door closes,
and, when next opened, the door passes the impact position very carefully in slow
mode. This prevents a further violent impact.
Reversing: If the door strikes an obstacle when closing, it is reopened immedi-
ately.
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