Agilent Technologies Turbo-V 903 Notice De Mode D'emploi page 273

Figure 10
Fault: this open collector output signal is ON when a system fault condition is
detected.
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.
For example:
Turbo-V 903 Pumping System User Manual / 87-901-016-01
Output signal
reference quantity: frequency
threshold: 500 Hz
hysteresis: 1%
activation type: "high level"
Technical Information
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