Emergency Power Supply (Optional); Overload Protection - Siemens AT18 Operating Instructions Manual

Operating Manual - Elevator Door Operation AT18

6.13 Emergency power supply (optional)

In case of a mains power supply a battery or rechargeable battery (e.g. lead-acid rechargeable
battery) can be connected to the external emergency power module (option) and thereby make
emergency operation possible.
The door can be opened and closed in this condition, the light barrier input is utilised. The travel
speed over the total travelling distance is thereby reduced to the values stored in the profile
parameters for the cutter speeds "OPEN" and "CLOSE".
When the mains power supply is available again, the control unit automatically switches back to
normal operation in the final setting of the door (OPEN or CLOSE).
CAREFUL
The circuit breaker for the emergency power supply to be installed onsite must have the delayed-
action value of 6A.

6.14 Overload protection

If the door actuator is heavily subjected to regular 'DOOR OPEN" and "DOOR CLOSE" instructions
following closely upon each other, then an increase of the holding open time automatically kicks in.
The next closing movement is
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