Control and monitoring of
motorized fire and smoke dam-
pers
in combination with the
Communication and Power
Supply Unit BKN230-24
Mode of operation
The BKS24-1B unit receives status infor-
mation about the fire and smoke damper
and issues control commands to it via
the Communication and Power Supply
Unit BKN230-24.
LEDs
on the front of the unit signal the
operating status of the damper and the
presence of faults anywhere in the
system.
Floating auxiliary contacts
allow the
unit to be linked into higher level systems
(such as damper end position indicators,
fault alarms, fan enabling, etc.).
Function testing
of the fire and smoke
damper systems by pressing the
“RESET/TEST” pushbutton.
Accessory
ZSO-11 plug socket suitable for 35 mm
DIN rail mounting.
Detailed functional sequences
see
over.
Typical wiring diagram
see over.
Communication and Control Unit BKS24-1B
Dimensions
T
~
AC 24 V
Fault
SAFE damper
position
NORMAL
damper position
Connect via
safety isolating
transformer
!
2
10
1
5
Reset
Test
AC
24 V
BKS24-1B
6
4
3
7
8
Control
ON / OFF
Connections
interchangeable
optional external
pushbutton
9
11
2-wire conductor
to BKN230-24
a
b
Open
Close
Alarm
Reset
Test
Note: Relay contacts are shown without power applied.
Wiring digram
Power consumption
2.5 W
Auxiliary switches
6 A (2 A), AC 24 V
Protection class
(safety low voltage)
Connection
Submagnal connector 11 pole, suitable for ZSO-11 socket
(ZSO-11 plug socket not included, order separately!)
For wire sizing
3 VA
Nominal voltage
AC 24 V 50/60Hz
Nominal voltage range
AC 19.2...28.8 V
Technical data
BKS24-1B
Maintenance
maintenance free
Degree of protection
IP 30
Ambient temperature range
0...+ 50 °C
EMC
CE according to 89/336/EEC
Weight
150 g
Damper in the
safe position
Causes / Sequence
No AC 24 V
power supply
Signalling and diagnosis
LEDs
Alarm
Open Close
Contacts
Description
OFF
OFF
OFF
ON
ON
ON
Test run ca. 35 s
, triggered by: AC 24 V energising or by pressing
“Reset / Test”
flash
Status
OFF
OFF
New fault,
possible causes: • Short-circuit or open-circuit in 2-wire conductor
or damper fault (BKN...) • No AC 230 V • Defective thermal trip • Smoke
detector triggered • Running time exceeded • Damper jammed
6
3
6
3
6
3
OFF
OFF
ON
Stored fault
• Signal given that there has been a fault in the system and it
should be checked
6
3
flash
6
4
OFF
OFF
Damper (actuator)
moving to
the safe position
OFF
OFF
6
4
ON
flash
8
7
OFF
OFF
Damper (actuator)
moving to
the operating position
OFF
OFF
8
7
ON
Damper in the
operating position
p0036707
w0622810
35
20
70
ZSO-11
BKS24-1B
65
BKS24-1B
ZSO-11: Width = 38 mm
d0050810
B
C
III
