Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice Proportional technology Series WPR 2 s 2 | 210 Pilot regulator construction characteristics Body Anodized aluminium Cover for electrical section Technopolymer Seals NBR Diaphragm Cloth-covered rubber Springs AISI 302 Actuators Brass with vulcanised NBR Weight 168 g Pilot regulator functional characteristics Supply connection M5 Exhaust connection Ø1,8 Operating connection M5 Air consumption < 1 Nl/min Standby current consumption 70mA Current consumption with solenoid valves on 400mA Maximum fittings tightening 3 Nm Fluid Air filtered at 5 micron and dehumidified Protection degree IP65 (with casing fitted) ** Input Impedance - Current 250 Ω ** Input Impedance - Voltage 10 kΩ Digital inputs + 24 V DC ± 10% Hysteresis ± Insensitivity Linearity ± Insensitivity Discharge flowrate 7 Nl/min Nominal flowrate from 1 to 2 (6 bar ΔP 1 bar) 7 Nl/min Assembly positions Indifferent Outlet pressure 0-9 bar Maximum inlet pressure 10 bar Minimum inlet pressure Desired outlet pressure + 1 bar Repeatability ± Insensitivity ** Reference Signal - Current *4 ... 20 mA *0 ... 20 mA ** Reference Signal - Voltage *0 ... 10 V *0 ... 5 V *1 ... 5 V Sensitivity 0,01 bar Environment temperature -5°C ... 50°C / 23°F ... 122°F Supply voltage + 24 V DC ± 10% (stabilised with ripple <1%) **Digital output + 24 V DC PNP (Max. current 50 mA) * Selectable by keyboard or by RS-232 ** Valid only for devices with analog input Installation and operation of the piloting proportional regulator PNEUMATIC CONNECTION The compressed air is connected by means of M5 threaded port in the body. Ensure the compressed air entering the unit is filtered for both water and dust down to 5 microns. Maximum inlet pressure is 10 Bar. The supply pressure to the regulator must always be at least 1 bar greater than the required outlet pressure. ELECTRICAL CONNECTION For the electrical connection a D-SUB 15-pole female connector is used (supplied separately). Wire in accordance with the wiring diagram shown below. Warning: INCORRECT CONNECTIONS MAY DAMAGE THE DEVICE. OPERATING NOTES If the electric supply is interrupted, the outlet pressure is maintained at the set value. However, maintaining the exact value cannot be ensured as it is impossible to operate the solenoid valves. In order to discharge the circuit downstream, zero the reference, make sure that the display shows a pressure value equal to zero and then disconnect the electric power supply. A version of the device is available that exhausts the downstream circuit when the power supply is removed. (Option A at the end of the part number). If the compressed-air supply is suspended and the electric power supply is maintained a whirring will be heard that is due to the solenoid valves; an operating parameter can be activated (P18) that triggers the regulator protection whenever the requested pressure is not reached within 4 seconds of the reference signal being sent. In this case the system will intervene to interrupt the control of the solenoid valves. Every twenty seconds, the unit will start the reset procedure until standard operating conditions have been restored.
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