7
Design with the communication and supply device BKN 230-24 and the actuating mechanism
BFL 24-T. It simplifies electrical wiring and interconnection of fire flap valves. It facilitates on site
check and enables central control and checks of fire damper by means of a simple 2-conductor
wiring.
BKN 230-24 functions as a decentralized network device for supplying the actuating mechanism
BFL 24-T with a spring back drive on one hand and on the other hand it transmits the signal
informing about the flap valve position OPERATION and FAILURE through 2-conductor wiring to
the central. Control command SWITCHED ON - SWITCHED OFF from the central through BKN
230-24 goes through the same wiring to the actuating mechanism.
To simplify the connection, the actuating mechanism BFL 24-T is equipped with
connecting plugs that are inserted directly to BKN 230-24. BKN 230-24 is supplied with a
conductor and an EURO plug to be connected to the 230V mains. 2-conductor wiring is
connected to BKN 230-24 by means of terminals 6 and 7. If the drive is supposed to be controlled
without any signal from the central, it can be switched on by means of a bridge between the
terminals 3 and 4. A green LED pilot light on BKN 230-24 is on when voltage is present in the
drive (AC 24V).
If the button on BAT is switched on or if the power supply (e.g. by a signal from ELECTRICAL
FIRE SIGNALISATION ) is disconnected, the damper position will be "FAILURE".
BAT
BKN
Actuating
mechanism
