17
16
Water nozzle, Circulation and Feeding pump connection
The Water nozzle, Circulation pump and Feeding pump outputs are
relay type (2A, 240V). Both the
NO
(normally open) and
NC
(normally
closed) contacts are available to the user. If the device is off, the
COM-
MON
pin is connected to corresponding
NC
pin
.
If the device is on, the
COMMON
pin is connected to the
NO
pin
.
• Connect one pin of the source to the
COMMON
pin.
• Connect the device between the
NO
pin and the remaining source pin.
Alarm connection
The Alarm output is relay type (2A, 240V). Both the NO (normally open)
and NC (normally closed) contacts are available to the user. If the alarm
is off, the COMMON pin is connected to the NC pin. If the alarm is off, the
COMMON pin is connected to the NO pin.
• Connect one pin of the source to the
COMMON
pin of the alarm
output.
• Connect the alarm device between the
NO
output pin and the
remaining source pin.
Acid and fertilizer dosing pump connection
The pH and EC correction relays (2A, 240V)
have a common pin: if the pH correction
pump is on, the
COMMON
pin is connected
to the
pH PUMP
pin; if the EC pump is
activated, the
COMMON
pin is connected to
the
FERT. PUMP
pin
.
• Connect one pin of the source to the
COMMON
pin.
• Connect the pH correction pump between the
pH PUMP
pin and the
remaining pin of the source.
• Connect the EC correction pump between the
FERT PUMP
pin and the
remaining pin of the source.
Note:
Both pH and EC correction pumps must have the same operating
voltage. The rated power of the pumps can be different.
pin is the same, so that the voltage of the power source has to match the
working voltage of the selected device and both the pH and EC correction
pumps have to work at the same voltage.
