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SPEED SETTING: PWM input signal to set the
pump speed. The PWM signal characteristics must
be the following:
• frequency: 100 Hz +/-20%
• ampitude: 0 - 24 V max
• duty
cycle
range:
corresponding to a pump speed from 250 Hz
(25%) to 1250 Hz (75%) linearly.
If any signal isn't applied (no connection) the pump
speed is set to "High Speed" (1250 Hz max and
settable by window "120").
If a continuous signal is applied (pin 5 fixed at +24
V and pin 6 fixed to ground) the pump speed is set
to "Low Speed".
The Low Speed frequency is settable by window
"117" (see "RS232/RS485 Communication De-
scription").
SOFT START: input signal to control the Soft Start
operating mode. To enable the "Soft Start" mode it
is necessary to supply a +24 Vdc signal to the
SOFT START (+) pin and to connect the SOFT
START (-) pin to ground.
PROGRAMMABLE ANALOG SIGNAL: this out-
put signal is a voltage (from 0 to 10 Vdc) linearly
proportional to a reference quantity (frequency or
power) set by the user (0V = 0W or 0Hz; 10V =
100W or 1250Hz). The default setting is the fre-
quency.
FAULT: this open collector output signal is closed
when a controller fault condition is detected.
from
25%
to
75%
PROGRAMMABLE SET POINT: this open collec-
tor output signal is enabled when the reference
quantity chosen (frequency, current or time) is
higher than the set threshold. The signal can be
"high level active" (that is the output is normally at
0 Vdc and becomes 24 Vdc when activated), or
"low level active" (that is the output is normally at
24 Vdc and becomes 0 Vdc when activated).
Moreover, if the reference quantity is the fre-
quency or the current, it is possible to set the hys-
teresis (in % of the threshold value) to avoid
bouncing.
For example:
− reference quantity: frequency
− threshold: 500 Hz
− hysteresis: 1%
− activation type: "high level"
− mask time: 10 sec
The set point output stays at 0 Vdc until the fre-
quency becomes higher than 505 Hz (that is 500
Hz + 1% of 500 Hz), then the output goes at 24
Vdc and stays at 24 Vdc until the frequency be-
comes lower than 495 Hz (that is 500 Hz – 1% of
500 Hz). It is possible to mask the set point check-
ing for a programmable mask time.
The PROGRAMMABLE SET POINT signal has
the following default settings:
− reference quantity: frequency
− thereshold: 1125 Hz
− hysteresis: 2%
− activation type: high level
− mask time: 0 second
The Software (optional) allows the operator to set
all the programmable feature.
When no external input-output device is available
this connector must be opened. So you don't have
to connect the supplied mating connector.
59
TECHNICAL INFORMATION
NOTE
87-900-962-01(A)
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