Soft Close Automatic Doors (SCA)

The Soft Close Automatic Doors are optional equipment (part of the convenience package). The drive assemblies are integrated into the door locks and are controlled by the individual door modules.

There are 2 additional hall sensor signals for the position detection of the SCA drive:

1. "Stand-by" position
2. "Locking pawl switch" position

• The control system always knows the position of the drive and can, if necessary, activate it in order to move it to a defined or "set" position.
• The "Locking pawl switch" position is set each time the drive is switched on and deleted again when switched off in a set position (stand-by or park). The "Stand-by" position" is set when the door is opened and deleted when the latch has reached the park position.
• When the door is opened, (recognized by the rotary-latch hall sensor), the SCA drive moves into the stand-by position so that it only needs to move half a turn into the park position the next time the door is pulled closed. If the door is moved into the main catch before the SCA is in operation (slamming shut), the SCA drive remains in the stand-by position. The SCA does not move the next time the door is opened.
• When the door is closed, the sensors identify the catch position from the locking pawl signal and pull the door into the main catch. The SCA drive then remains in the park position.
• If the electronics fails to identify the reaching of the two defined positions, the control system assumes a timeout after 5 seconds and shuts down the SCA drive. An entry is also made in the fault memory of the respective door module.
• The stop conditions are checked every 23 ms while the SCA is in operation. The motor is shut down if the SCA is not stopped within 5 seconds. The motor is switched off when reaching the park position.