Emerson Rosemount 3490 Series Reference Manual page 107

Reference Manual
00809-0100-4841
Figure 4-33: Pump 1 and Pump 2 are Off (Level Okay)
E
A. Level in m
B. 8.0 m (P421)
C. 5.0 m (P411)
D. 2.0 m (P412)
E. Pump 1
F. Pump 2
When the level exceeds 5 m (On Point, P411), relay RL1 is energized to start Pump 1.
(Figure
Figure 4-34: Pump 1 is On (Rising Level Above 5 m)
E
A. Level in m
B. 8.0 m (P421)
C. 5.0 m (P411)
D. 2.0 m (P412)
E. Pump 1
F. Pump 2
When the level exceeds 8 m (On Point, P421), relay RL2 is energized to start Pump 2. Relay
RL1 is de-energized to switch off Pump 1
Emerson.com/Rosemount
A
B
C
D
F
4-34).
A
B
C
D
F
(Figure 4-35).
Getting started
January 2021
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