Grundfos CU 362 Instrucciones De Instalación Y Funcionamiento página 9

4.4 Schematic system overview
4.4.1 Two pumps with analog level sensor and safety float switches
Figure Two pumps with analog level sensor and safety float switches
(AI1, CU 362). The system has two safety float switches, i.e. for high level (DI2, CU 362) and for dry running (DI1, CU 362). A flowmeter has
been installed in the discharge line. The flowmeter is both connected to an analog input (AI2, CU 362) for actual flow measurement and to a
digital input (DI1, IO 351B) set up as a counter input (flowmeter).
Two pumps with analog level sensor and safety float switches
Float switch Unit
Float switch 2
CU 362
Float switch 1
Sensor Unit/module
Level sensor CU 362
CU 362
Flowmeter
IO 351B-1
shows an example of a two-pump installation with an analog level sensor
DI
AI
CU 362
AO
DO
2
1
Signal (terminal)
DI2 (12), GND (13)
DI1 (10), GND (11)
Signal (terminal)
AI1 (51), +24 V (47), GND (58)
AI2 (54), +24 V (50), GND (58)
DI1 (10), GND (15)
AI2 (54), +24 V (50), GND (58)
DI1 (10), GND (15)
AI1 (51), +24 V (47), GND (58)
DI2 (12), GND (13)
DI1 (10), GND (11)
Description
High level
Dry running
Description
Level measurement
Actual flow measurement
Flowmeter (total volume)
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