22
Mounting and Connection Instructions Blocking Element 3
6.
Actuation of several blocking elements
All blocking elements are activated
Pay attention to the
The current supply must provied sufficient current for the simultaneous acti-
vation of all blocking elements.
simultaneously.
total current consumption.
If several blocking elements are used, the control inputs of all involved blocking
elements are connected parallel.
rt
bl
+U_b
0V
Blocking element 3
+12 V DC
0 V
7.
Emergency unlocking
7.1
Electrical emergency unlocking
Due to a short-term interruption of the opera-
ting voltage, the locking bolt automatically
moves into the “OPEN” position. This can be
achieved e.g. by linking a key-button in the
+U_b (red) line.
7.2
Mechanical emergency
unlocking
The emergency open axis is accessible on
both sides of the blocking element so that the
locking bolt can be moved into the “OPEN”
position using a screwdriver for slotted
screws.
Due to the low transmission, a high number
of revolutions is required.
If the operating voltage is still available for
the blocking element, the bolt is moved into
the position “OPEN” after a few revolutions of
the motor-powered emergency opening axis.
(Combination of mechanical and electrical
emergency unlocking).
emergency-opening
switch (NC)
Emergency
unlocking
