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PROGRAMMABLE SET POINT: this open collector 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 frequency or the current drawn, it is
possible to set the hysteresis (in % of the threshold value) to avoid
bouncing.
The open collector output needs at least an external pull-up resistor (10 kΩ for
NOTE
example) between output and pin 9 (+24 Vdc) in order to "sec" a voltage switch.
For example with default values:
Figure 17
It is possible to delay the set point checking for a programmable
delay time.
TV
401/301 MS
User Manual / 87-901-013-01
reference quantity: frequency
threshold: 980 Hz
hysteresis: 2 %
actiation type: "low level"
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