17
Nominal voltage
AC 24 V 50/60Hz
Power consumption
2,5 W (operating position)
Dimensioning
5 VA
Protection Class
III
Degree of protection
IP 30
Ambient temperature
0 … +50°C
Connection
11-pole connector ZSO-11, it is not part of BKS24-1B,
ZSO-11 is 11-pole screw terminal 11 x 1,5 mm
²
BKS 24-9A communication and control device is used for group control and checks of 1 to 9 fire
dampers with the actuating mechanism BF 24-TN-ST (BFL 24-T-ST, BFN 24-T-ST) in connection
with the supply and communication device BKN 230-24. Signalisation of the damper position is
individual; the damper can be controlled and tested only as a group. BKS 24-9A is intended for
use in the distribution board and displays the operation situations and failure reports of the
connected fire dampers. It is possible to signalise functions such as the damper position and
failure reports or to transmit them further to the system by means of integrated auxiliary switches.
BKS 24-9A receives signals from BKN 230-24 through the two-conductor wiring and issues
control commands. Proper damper operation is indicated by two light LED diodes:
Control ON = position OPERATION
Control OFF = position FAILURE
If the fire damper do not reach the given position in time tolerable for displacing, the appropriate
light diode FAILURE starts to flash and K1 contact is opened (current failure). In case that the
faulty damper finally reaches its given position, K1 is closed and the failure report light shines (the
failure is saved in memory). K2 - the auxiliary contact - is used for signaling of the flap position to
the master device. Function of this auxiliary contact can be programmed through the terminal
14 according to the Tab. 3.2.1.
current failure
15 16
no failure
15 16
K2 contact is on if all the
flaps are open
14 11
17 18
K2 contact is on if the flap
No. 1 is open
14 12
K2 contact is on if all the
flaps are closed
14 open
Function check can be done in the position OPERATION by means of pushing the TEST button.
While the button is pushed, the flap blade is turning into the position FAILURE. Fault function is
indicated by a report "FAILURE". Assembly and connection BKS 24 - 9A can be made by DIN
35 mm panel. It is connected by two 9-pole plug-in connectors.
