ETS 73
0548-990-51---60g_2019.10.indd
0548-990/52g
Page 59 of 98
Mounting and operating instructions
6.2
Closing sequence control
For bi-parting installations, the closing sequence control determines the order in which the door
leaves are opened and closed. For the opening procedure, the earlier door leaf (Master leaf) is
the first one to be opened, whereas for the closing procedure the delayed door leaf (Slave leaf) is
the first one to be closed. This sequence ensures a correct overlapping of the door leaves.
Connections:
Opening elements (KE, OEO and OEI) connected to Master only act upon the Master (single leaf
operation). Opening elements connected to Slave act upon the Master as well as on the Slave (bi-
parting operation).
The safety elements SER and SES are connected to the respective drive mechanism.
An active EMCY element connected to the Master carries out the EMY-IN action configured on the
Master (for both door leaves). An active EMCY element connected to the Slave switches the latter
to the spring-powered operation.
An electric lock, which locks the Master leaf, is connected to the Master. Accordingly, an electric
lock, which locks the Slave leaf, is connected on the Slave.
Drive mechanism 2
Slave
Drive mechanism 1
Master
Earlier door leaf
the first one to open
the second one to close
Delayed door leaf
the second one to open
the first one to close
