16
Current outputs
6 Installation
Instruction book, IQAN- XT2
Current outputs
The current output signals control proportional valves and devices. For the current
range see Appendix A, on page 23.
Dither frequency and amplitude
To obtain the best performance from proportional valves the module produces a direct
current (DC) with a dither. The dither frequency and the dither amplitude can be
adjusted in IQANdevelop. Depending of what kind of valve is to be used, a certain
recommended dither frequency/amplitude set-up can be supplied by Parker Hannifin
Corporation, in order to obtain an optimized valve hysteresis. Both frequency and
amplitudes will then be set in IQANdevelop.
Connecting loads to current outputs
Connecting a load, e.g. one proportional valve, to the current output is done by using
the COUT/CRET paired positions.
EXAMPLE
Positive direction:
Connect the proportional valve to the COUT-A, position 17 and the CRET-A+,
position 18 respectively.
Negative direction:
Connect the proportional valve to the COUT-A, position 31 and the CRET-A- ,
position 32 respectively.
Connecting a load to the current output.
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