Applications
Pumping station
OFS
Page 28
Empty the vessel with overflow protection
Switching output 1: control to empty vessel
upper value exceeded → submersible pump ON
lower value reached → submersible pump OFF
hysteresis function, normally open (Hno)
Switching output 2: overflow protection
maximum value exceeded → alarm
slightly below SP2 (to suppress wave movements)
hysteresis function, normally closed (Hnc)
L
SP2
rP2
SP1
rP1
OUT1
1
Hno
0
OUT2
1
Hnc
0
If SP1 is exceeded, output 1 switches (submersible pump ON). When
rP1 has been reached again the output switches back (submersible
pump OFF).
If SP2 is exceeded or if there is a wire break, output 2 switches off.
empty
overflow protection
t