Fire-resistant damper model BKA-Ü
Technical documentation
Spring return actuators
Construction subject to change
No return possible
Version: 2021-07-01 | Page 28
24 V actuators (
S00/S10/S20)
Table 10: Technical data of S00/S10/S20 (24 V spring return
actuators)
Electric spring return actuators with temperature monitoring
unit (assignment of the actuator types according to the BKA-
Ü dimensions, as per Table 8 page 26).
Release temperatures: ambient temperature 72 °C and in-
ternal duct temperature 72 °C
Operating position (damper "OPEN") is approached auto-
matically and return spring is tensioned by applying the
supply voltage to the relay module RM. It supplies the
spring return actuator with supply voltage.
!
Thus,
the
safety
function
is
ensured.
Safety position (damper "CLOSED") through spring force
when supply voltage is interrupted by the smoke detec-
tion system or the temperature monitoring unit (ambient
temperature 72 °C or internal duct temperature 72 °C) of
the spring return actuator responds. The response of the
temperature monitoring unit interrupts the supply volt-
age permanently and irrevocably.
Indication of damper end positions by integrated auxiliary
switches via potential-free changeover contacts (S1 - S3
"CLOSED" indicates "CLOSED" position; S4 - S6 "OPEN" in-
dicates "OPEN" position).
Manual actuation and fixing in any position is possible in
the de-energised state. It is unlocked manually.
An on-site functional check is possible by means of a
pushbutton or temperature monitoring unit permanently
connected to the actuator.
Spare parts: Duct tip for temperature monitoring unit with
internal duct temperature of 72 °C (ASK79.4).
The replacement takes place by unscrewing both screws
at the temperature monitoring unit and removing the ac-
tuator unit. Pull the duct tip (internal duct temperature
fuse) off the temperature monitoring unit and replace it
with a new duct tip with internal duct temperature of 72
°C (ASK79.4). Reinsert temperature monitoring unit into
actuator unit and screw it down.
For damage other than to the duct tip (internal duct tem-
perature fuse), the entire actuator/temperature monitor-
ing unit set must be completely replaced.
Actuator type
S00
(GRA126.1E/SO3)
S10
(GNA126.1E/SO3)
S20
(GGA126.1E/SO3)
Supply [V]
AC 24 / DC 24…48 (SELV/PELV)
Operating voltage [V]
AC 24 ±20% /
DC 24…48 ±20%
Frequency [Hz]
50/60
Power consumption during
operation
AC: 5 VA / 3.5 W
DC: 3.5 W
AC: 7 VA / 5 W
DC: 4 W
Power consumption
in idle position
AC/DC: 2 W
AC: 5 VA / 3 W
DC: 3 W
Auxiliary switch
*)
Integrated, fixed switching point at 5° or 80°
Auxiliary switch
switching voltage [V]
AC 24…230 / DC 12…30
Auxiliary switch rated cur-
rent [A]
AC: 6 (ohmic) or. 2 (inductive) / DC: 2
Supply cable
Cable 0.9 m, 2 x 0.75 mm² (halogen-free)
AC 24V: (wires 1-2)/
AC 230V: (wires 3-4)
+ 3-pin connector
Auxiliary switch cable
(wires S1…S6)
Cable 0.9 m, 6 x 0.75 mm² (halogen-free)
+ 6-pin connector
Motor running time [s]
(angle of rotation 90°)
90
Spring return runtime [s]
15
Protection class
III according to EN 60 730
Degree of protection ac-
cording to EN 60 529
IP54
Ambient temperature Nor-
mal operation
-
32…+50°C (actuator)
-
20…+50°C (temperature monitoring unit)
Storage temperature
-
32…+50°C (actuator)
-
20…+50°C (temperature
monitoring unit)
Ambient humidity
<95% r.h. / no dewing (actuator)
CL D according to DIN 40040 (temperature monitoring unit)
*) Either only mains voltage or only safety extra low voltage may be applied to the auxiliary switches. Mixed operation is not allowed. Operation with different phases is not allowed.
