19
6 Setup
VEGATOR 141 •
46838-EN-210714
•
Switching point monitoring (overflow protection):
Fill the ves-
sel up to the set switching point
– When the switching point is reached, the respective relay must
deenergize
•
Switching point monitoring (dry run protection):
Empty the
vessel down to the set switching point
– When the switching point is reached, the respective relay must
deenergize
6.6 Function diagram
The following diagram provides an overview of the switching statuses
depending on the set mode and the level.
Note:
Selection of the mode on the controller only functions correctly if the
4 … 20 mA characteristics are set in the sensor.
3
1
4
2
L E D
O N
O F F
Relais
O N
O F F
t
Fig. 8: Function diagram, single-point control
1 Filling height
2 Switching point
3 Mode overfill protection
4 Mode dry run protection
On the instrument version with fail-safe relay, the relay is switched
on under normal operating conditions. In case of fault, the relay is
switched off (safe currentless state).
Single-point control/limit
level
Fail safe relay (optional)
