Grundfos SLC Series Installation And Operating Instructions Manual page 5

3.4.2 SLC, for one pump (Simplex)
Float-switch-controlled option
The SLC, float-switch-controlled option, enables control of one
(1) pump, utilizing the following float switch inputs:
– high water-level alarm
– pump on
– pump off.
Transducer-controlled option
The SLC, transducer-controlled option, enables control for one
(1) pump, utilizing an analog submersible level transducer with
float-switch alarms:
– 4-20 mA (analog) water-level detection for duty and standby
pump control
– high water-level alarm float switch
– low water-level alarm float switch.
3.4.4 Application examples
SLC, float-switch-
controlled option
DLC, float-switch-
controlled option
Fig. 4 Application examples
* As standard, transducer-controlled panels have high- and low-level float-switch backup inputs for pump operation and alarm
conditions. It is optional to use these float switches.
3.4.3 DLC, for two pumps (Duplex)
Float-switch-controlled option
The DLC, float-switch-controlled option, enables control of two (2)
pumps, utilizes the following inputs:
– high water-level alarm
– duty pump on
– standby pump on
– pump(s) off.
DLC, transducer-controlled option
DLC, transducer-controlled option, enables control of two (2)
pumps, utilizing an analog submersible level transducer with
float-switch alarms:
– 4-20 mA (analog) water-level detection for duty and standby
pump control
– high water-level alarm float switch
– low water-level alarm float switch.
SLC, transducer-
controlled option
(analog, submersible
transducer with float-
switch backup)*
DLC, transducer-
controlled option
(analog, submersible
transducer with float-
switch backup)*
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