Parker IQAN-MC31 Instruction Book

25Proportional outputsInstruction book, IQANProportional outputsThe current /PWM outputs control proportional valves and devices. For the currentrange and loads, see Appendix A.FrequencyTo obtain the best performance from proportional valves the controller produces aPWM current mode (closed loop) output signal or a PWM voltage (open loop) outputsignal. The type of output is selectable in IQAN software. The module has anadjustable frequency which can be changed using IQAN software. For the possiblefrequencies, see Appendix A.Connecting loads to proportional outputsConnecting a load, e.g. one proportional valve section, to the current mode or PWMmode outputs is done by using the COUT/CRET paired positions.N OTICEDO NOT install diodes across coils for Current or PWM modes!EXAMPLEPositive direction:Connect the proportional valve to the COUT-X, and the CRET-X+, respectively.Negative direction:Connect the proportional valve to the COUT-X, and the CRET-X-, respectively.Connecting a load to a proportional output.COUT-XCRET-X-CRET-X+Directional ValveIQAN module