User Manual

Hardware IO connection
Digital inputs for potential
-
free contacts
4
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Application programming details
In the application, the raw data is read from the hardware with measuring unit
“mV”.
Reliability Range
OK 0 … 10500
Over range > 10500
Note: For sensors of 0…5 V, judge the reliability when programming.
4.4 Digital inputs for potential-free contacts
Use
The digital inputs for binary signals from potential-free contacts are used for the
following purposes:
● Polling switch states (e.g. pressure switches, motor thermal protection,
remotely installed acknowledgement buttons, voltage monitoring devices, etc.)
● Pulse counting
Connection example
The following illustrations shows a connection with 1 contact.
D1 Input signal
M Measuring neutral (reference voltage G0) for the input signal
WARNING
Connect only potential
-
free contacts.
4.5 Digital inputs for pulse input
Use
The digital input D1 and D2 supports pulse and PWM measuring. It is especially
used for:
● Measuring the fan or pump speed with pulses
● Measuring the fan or pump speed, flow rate with PWM
Programing details in application
The pulse input range is 0 … 30000 RPM. Consider the frequency range for PWM
measuring.