Parker IQAN-XA2 Instruction Book

22Connecting loads to proportional PWMOUT outputsInstruction book, IQANConnecting loads to proportional PWMOUT outputsConnecting a load, e.g. one proportional valve section, to the PWM mode outputs isdone by using the PWMOUT/PWMRET paired positions.N OTICEDO install diodes across coils for PWMOUT mode on all other solenoids!If maximum load inductance is exceeded, or if PWM outputs are externally grounded, aclamping diode must be used. Place the diode between the PWMOUT and PWMRET,or the PWMOUT and ground, as close to the load as possible. This protects the outputagainst high voltage transients.For example, use diode: 1N5408 (3A/1000V).Depending on the load, other clamping diodes might be used instead.EXAMPLEPositive direction:Connect the proportional valve to the PWMOUT-X, and the PWMRET-X+,respectively.Negative direction:Connect the proportional valve to the PWMOUT-X, and the PWMRET-X-,respectively.Connecting a load to a proportional output.N OTICEDO NOT install diodes across coils for PWMOUT mode for Parker Pulsarsolenoids!PWMOUT-XPWMRET-X-PWMRET-X+Directional ValveIQAN module