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OPERATION AND FUNCTION
NOTE
• No external voltage may be applied!
5.4.6. Connection of automatic mode remote activa-
tion and deactivation (External OFF)
Remote switching of automatic mode can be
realised via a potential-free contact. Using an
additional switch (e.g. a float switch) automatic
mode can be switched on and off as a result. This
function overrides all other switching points and
all pumps are switched off. The terminals are
fitted with a converter bridge in the factory.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Remove the converter bridge and connect the
wires to the terminal strip according to the wiring
diagram.
• Contact:
• Closed: Automatic on
• Open: Automatic mode off - signal via an icon
on the display
NOTE
No external voltage may be applied!
5.4.7. Connection of level actual value display
A 0 - 10 V signal is available for external meas-
urement / display of the level actual value via the
corresponding terminals. With this 0 V is the level
sensor value "0" and 10 V the level sensor final
value.
Example:
• Level sensor 2.5 m
• Display range: 0...2.5 m
• Setting: 1 V = 0.25 m
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires to the terminal strip according
to the wiring diagram.
NOTE
• No external voltage may be applied!
• To be able to use the function, the value
"Sensor" has to be set in menu 5.2.6.0.
5.4.8. Connection of collective run signal (SBM),
collective fault signal (SSM) or high-water alarm
(HW)
Potential-free contacts for external signals are
available via the corresponding terminals.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires to the terminal strip according
to the wiring diagram.
• Contact:
Installation and operating instructions Wilo-Control SC-L...-FTS
• Type: Changeover contact
• Switching capacity: 250 V, 1 A
DANGER due to electrical voltage!
An external voltage is applied at the terminals
for this function. This is also present at the
terminals when the main switch is switched
off! There is a risk of fatal injury! The power
supply must be disconnected from its source
before all work!
6. Operation and function
This section contains all information on how the
switchgear functions as well as information on
the menu structure.
POTENTIALLY fatal danger due to electrical
voltage!
When performing work on the uncovered
switchgear, there is a risk of fatal electric
shocks occurring. All work on individual
components must be performed by a qualified
electrician.
NOTE
Following a power supply interruption, the
switchgear will automatically start up in the last
operating mode set!
6.1. Operating mode and operation principle
6.2. "Empty" operating mode in the FTS mode
The reservoir is emptied. The connected pumps
are activated when the level rises and switched
off when the level falls.
6.2.1. Operating principle
In automatic mode, the connected pump(s) are
actuated depending on the fill levels defined.
Measurement of the individual fill levels can be
performed via a level sensor.
On reaching the activation point, the pump is
switched on. A visual indicator appears on the
LC display and the green LED lights up while the
pump is in operation.
On reaching the deactivation point, the pump is
switched off after expiration of the set follow-up
time. Both pumps operate in alternating opera-
tion.
During operation, all safety functions are active.
In case of one pump malfunctioning, automatic
changeover to a fully-functional pump takes
place. An optical alarm signal is output and the
collective fault signal contact (SSM) is active.
Once dry run level or high water level is reached,
a visual alarm signal is output, the collective fault
signal contact (SSM) and high water alarm contact
(only in case of overflow) are active. Additionally,
forced switch-off of the active pump occurs.
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