Electrical data Nominal voltage AC/DC 24V
Nominal voltage frequency 50/60Hz
Nominal voltage range AC 19.2V…28.8V / DC 21.6V…28.8V
Power consumption BFL24(-T)
BFL24(-ST)
2.5W @ running / 0.7W @ holding
2.5W @ running / 0.8W @ holding
Power consumption for wire sizing 4VA (Imax 8.3A @ 5ms)
Auxiliary switch 2 x SPDT
Switching capacity auxiliary switch 1mA…3 (0.5) A, AC 250V (II Protective
insulated)
Switching points auxiliary switch 5° / 80°
Connection supply Cable 1m, 2 x 0.34mm² (halogen-free)
Connection auxiliary switch Cable 1m, 6 x 0.75mm² (halogen-free)
Cable length thermoelectric
tripping device
BFL24-T
BFL24-T-ST
0.5m
Functional data Torque motor Min. 4Nm
Torque spring return Min. 3Nm
Direction of rotation motor Can be selected by mounting L/R
Manual override With position stop
Angle of rotation Max. 95° (incl. 5° initial spring tension)
Angle of rotation note (incl. 5° initial spring tension)
Running time motor <60s / 90°
Running time spring return 20s @ -10…55°C / <60s @ -30…-10°C
Sound power level motor max. 45dB(A)
Sound power level spring return max. 63dB(A)
Damper rotation Form fit 12x12mm, continuous hollow shaft
Position indication Mechanically, with pointer
Service life >60,000 safety positions
Safety Response temperature
thermal fuse
BFL24-T(-ST):
BAT
Duct outside temperature 72°C
Duct inside temperature 72°C
Protection class IEC/EN III Safety extra-low voltage
Degree of protection IEC/EN IP54 in all mounting positions
EMC CE according to 2004/108/EC
Low-voltage directive CE according to 2006/95/EC
Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
Mode of operation Type 1.AA.B
Rated impulse voltage supply/control 0.8kV
Control pollution degree 3
Ambient temperature -Normal Duty
-Safety Duty
-30…55°C
The safety position will be attained up to
max. 75°C
Non-operating temperature -40…55°C (-40…80°C without thermal trip)
Ambient humidity 95% r.h., non-condensing
Maintenance Maintenance-free
Weight Weight BFL24(-ST)
BFL24-T(-ST)
Approx. 1.1kg
Approx. 1.2kg