Siemens SIDOOR AT40 System Manual page 49

The CLOSE relay (X11) picks up when a "DOOR CLOSE" command is active and the door is blocked
for at least 1 second in the CLOSE direction. The CLOSE relay (X11) drops off when the door has
moved from the blocking position by 1 cm in the OPEN direction, or a "DOOR OPEN" command
is active.
The OPEN relay (X13) picks up when a "DOOR OPEN" command is active and the door is blocked
for at least 1 second in the initial mode in the OPEN direction. The OPEN relay (X13) drops off
when the door has moved from the blocking position by 2 cm in the CLOSE direction, or a "DOOR
CLOSE" command is active.
The initial mode can be skipped by connecting an end position sensor (DCPS) in the closed
position.
The door travels open immediately with the normal speed when the DCPS (see section DCPS
(Door Closed Position Sensor) (Page 42)) is set up. In this case, the door must be in the CLOSED
position for the restart.
If a defect in the end position sensor is recognized (sensor is active across a distance of more than
10 cm), the system changes back to the initial mode (see section DCPS (Door Closed Position
Sensor (Page 42))).
AT40 and ATD400V for elevators
System Manual, 06/2022, A5E42192709-AH
SIDOOR functions
4.2 System functions
47