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Technical data
KFD2-SR2-Ex2.W.SM
4
Refer to "General Notes Relating to Fuchs Product Information".
Fuchs Group
USA: +1 330 486 0002
Singapore: +65 6779 9091
Germany: +49 621 776 2222
www.pepperl-fuchs.com
The function of standstill monitor with start-up override (S3 = I) or standstill monitor with rotation direction monitoring (S3 = II) can
be selected by means of DIP switches.
Standstill monitor with start-up override (S3 = I)
If the frequency falls below the trip value set with the DIP switches S1 and S2, the standstill monitor with start-up override switches
the output I to passive and the output II to active. Input I is used to monitor the frequency of rising current edges. Signal
transmitters can be sensors in accordance with EN 60947-5-6 (NAMUR) or contacts. Input I is monitored for lead breakage/short-
circuiting. A start-up override can be initiated via input II. The duration of the start-up override can be selected between 5 and
20 seconds by means of a bridge (starting trigger) or an external trigger signal. During the start-up override time the outputs
assume the "no standstill" state. In this case there is no lead breakage/short-circuit monitoring at input II.
Operating principle
S3:
I
II
Function:
Standstill monitor with
start-up override
Standstill monitor with
rotation direction monitoring
Input I:
Pulse input 1:
NAMUR
contacts (bounce-free)
Pulse input 1:
NAMUR
contacts (bounce-free)
Input II:
Start-up override:
contact terminal 4 + 6: 20 seconds
contact terminal 5 + 6: 5 seconds
Pulse input 2:
NAMUR
contacts (bounce-free)
Output I:
MIN/passive
MIN/passive
Output II:
MIN/active
Direction of rotation/error
Trip value
Hysteresis
Switch S2
Switch S1
0.1 Hz
0.02 Hz
I
I
0.5 Hz
0.1 Hz
I
II
2 Hz
0.4 Hz
II
I
10 Hz
2 Hz
II
II
Output I
Switching point
active
passive
f
Output II
Switching point
active
passive
f
Mode of operation MIN/passive
Mode of operation MIN/active
