Pepperl+Fuchs SIL VIM8 Series Manual page 9

Functional Safety Vibration Sensor VIM8*
Product Description
Device with Pre-Alarm and Main Alarm
The device evaluates the vibration amplitude in two independent channels.
If the vibration variable is exceeded, this is signaled at the switching contacts.
The switching contacts can be used to generate a pre-alarm and a main alarm.
Figure 2.1
R1 Relay contact output R1
R2 Relay contact output R2
SP1 Switching threshold LIM1
SP2 Switching threshold LIM2
W Critical state = pre-alarm from SP1/main alarm from SP2 = relay open =
like de-energized state
Device with Window Function
The lower switching threshold of the window area is adjusted on LIM1 and the upper switching
threshold is adjusted on LIM2. If the acceleration value is below or above the adjustable
window area, an alarm will be triggered.
Figure 2.2
R1 Relay contact output R1
R2 Relay contact output R2
SP1 Switching threshold LIM1
SP2 Switching threshold LIM2
W Window area
Critical state = out of window (SP1, SP2) = relay is open = like de-energized state
Note
See corresponding datasheets for further information.
R1
R2
Vibration sensor with pre-alarm and main alarm
R1
R2
Vibration sensor with window function
SP1 SP2
SP1 SP2
W
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