page
Level limit switch
Series RN 4000
Technical information / Instruction manual
Function
A measuring vane is driven by a synchronous motor. The
bearing of the motor inside the housing allows it to swing. The
motor is fixed to a switching lug.
If the vane is uncovered, a spring pulls the motor and switching
lug to the left position (figure 1).
When material covers the vane and thus stops the rotation, the
motor and switching lug swings to the right position (figure 2).
The signal output indicates "covered" and the motor is stopped.
When the vane becomes uncovered due to falling material,
the spring pulls the motor and switching lug back to the left
position (figure 1). The motor is started and the signal output
indicates "uncovered".
Signal output delay
The version "universal voltage" and "PNP" has an integrated
adjustable delay for the signal output.
Option fail safe alarm
With the fail safe alarm it is possible to recognize a fault of the
unit in time and to initiate an alarm relay. The following faults are
observed:
• Motor
• Gear
•
Electronic for motor power supply
•
Supply voltage failure
•
Defect of the connecting wires
Switchable signal output (Fail safe high/ low)
With version "Universal voltage" and "PNP" a switchable signal
output FSH/ FSL is integrated.
Figure 1
Switch for
signal output
Switching
lug
Switch for
motorstop
Figure 2
Electronics
Supply
Signal output
SPDT
(1)
PNP
FSH/
FSL
(2)
Adjust.
delay
Fail safe
alarm
AC version
24 V or 48 V or
115 V or 230 V AC
•
-
-
-
-
DC version
24 V DC
•
-
-
-
-
DC version
24 V DC PNP
-
•
•
•
-
Universal
voltage
24V DC/ 22 .. 230 V AC
•
-
•
•
option
(1)
Micro switch, Relais for universal voltage
(2)
Switchable signal output (Fail safe high/ low)
Rotonivo
®
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RN 4000
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