Parker iqan-mc3, User Manual

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33
Frequency inputs
7 I/O functionality
Instruction book, IQAN-MC3
Frequency inputs
Connecting sensors to the frequency inputs
Frequency inputs can operate in 2 modes. Speed which is frequency and position which
is a pulse count. For the frequency ranges and trigger levels, see Appendix A, on page
46.
Simple frequency sensor
The positive terminal of the frequency sensor is connected to the +VREF and the
negative terminal to the -VREF respectively. The sensor signal is

connected to the FIN position.
N
OTICE
The negative terminal of the sensor must not be connected to the chassis.

Maximum load for VREF position, see Appendix A, on page 46.
Using frequency inputs in safety functions
The following addional information applies when the inputs are used in safety
functions, where an incorrect input signal can lead to an immediate increase of the risk.
Directional frequency inputs
Connecting sensors to the directional frequency inputs
Directional frequency inputs can operate in 2 modes. Speed which is frequency and
position which is a pulse count. For the frequency ranges and trigger levels, see
Appendix A, on page 46.
EXAMPLE
Connect the positive and negative terminals of the frequency sensor to +VREF and

-VREF, respectively. Then connect the sensor signal to a FIN.
Connecting of frequency sensor to FIN.
MC3-SMR-010:A Use of FIN inputs in pairs
When frequency inputs are used in safety functions, the application shall be
designed so that the input signals are compared to an additional signal to ensure that
it is correct.
OR
Frequency sensor
IQAN-MC3
+VREF
FIN
-VREF