Parker IQAN-XA2 Instruction Book

21Proportional 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 acurrent mode (closed loop) output signal or a PWM mode (open loop) output signal.The type of output is selectable in IQAN software. The module has an adjustablefrequency which can be changed using IQAN software. For the possible frequencies,see Appendix A.Connecting loads to proportional COUT outputsConnecting a load, e.g. one proportional valve section, to the current mode outputs isdone by using the COUT/CRET paired positions.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.N OTICEDO NOT install diodes across coils for COUT mode! (In COUT mode an internalclamping diode is used).COUT-XCRET-X-CRET-X+Directional ValveIQAN module