5
6. Voltage-free alarm contact
HF.EA.17447 / HF.EA.17448 / HF.EA.24139
The supplied three-pin plug is needed for using the voltage-free alarm contact. Only the two external terminals are
connected to the plug! Internally a contact is switched (closed) as soon as the circulating air filter attachment
reaches the prescribed volumetric flow.
Thus signalling is on hand in case of extraction air trouble or when your circulating air filter attachment is discon-
nected from the mains.
5
6. Voltage-free alarm contact
The supplied three-pin plug is needed for using the voltage-free alarm contact. Only the two external terminals are
connected to the plug! Internally a break contact is switched (opened) as soon as the circulating air filter attachment
reaches the prescribed volumetric flow.
Thus signalling is on hand in case of extraction air trouble or when your circulating air filter attachment is disconnected
from the mains.
The voltage-free alarm contact is not to be used for operating large loads. It is only envisaged for signalling a
malfunction by means of a signalling lamp, horn and the like!
7. Technical data
The figures in the table are provided as a guide, and are not to be used in the sense of assured properties.
HF.EA.8677/ HF.EA.11442 / HF.EA.11570 / HF.EA.15575 / HF.EA.8473 / HF.EA.17447 / HF.EA.17448
Dimensions W x D x H (mm)
200 x 400 x 200
Nominaql rating
35 Watt
Nominal voltage
230 V
Frequency
50 Hz
Power consumption
0,15 A
Noise level
3m/35 dB (A)
Revolution Rpm
2450
Weight approx.
7 kg
Max. Length of extraction air duct by customer (including max. 2 pipe elbows)
15 m
Load capacity of the voltage-free switch contact
Maximum switching-on current AC
230 V ~
Maximum switching-on current DC
48 V
Maximum permanent current
1 A
Diagramm
HF.EA.8677/ HF.EA.11442 / HF.EA.11570 / HF.EA.15575 / HF.EA.8473 / HF.EA.17447 / HF.EA.17448
Customer
Example
Internal voltage-free
switch contact
Voltage-free alarm contact
Pressure
drop Pa
Air fl ow m
3
/h
The voltage-free alarm contact is not to be used for operating large loads. It is only envisaged for signal-
ling a malfunction by means of a signalling lamp, horn and the like!
7. Technical data
The figures in the table are provided as a guide, and are not to be used in the sense of assured properties.
HF.EA.8677 / HF.EA.11442 / HF.EA.11570 / HF.EA.15575 / HF.EA.8473 / HF.EA.17447 / HF.EA.17448
HF.EA.23866 / HF.EA.24139
Dimensons W x D x H (mm)
200 x 400 x 200
Nominal rating
35 Watt
Nominal voltage
230 V
Frequency
50 Hz
Power consumption
0,15 A
Noise level
3m/35 dB (A)
Revolution Rpm
2450
Weight approx.
ca. 7 kg
Max. Length of extraction air duct by customer (including max. 2 pipe elbows)
15 m
Load capacity of the voltage-free switch contact
Maximum switching-on current AC
230 V ~
Maximum switching-on current DC
48 V
Maximum permanent current
1A
Diagramm
HF.EA.8677/ HF.EA.11442 / HF.EA.11570 / HF.EA.15575 / HF.EA.8473 / HF.EA.17447 / HF.EA.17448 /
HF.EA.23866 / HF.EA.24139
Air flow m
3
/h
Pressure
drop Pa
