Electropneumatic valve positioner ENP225 series

linearanalogexplosion-proof

ACCURATE AND STABLE IINPUT: 4-20 mA OR 0-5 VDC ZERO AND SPAN ADJUSTMENTS SINGLE OR DOUBLE ACTING MODELS INTRINSICALLY SAFE OR EXPLOSION PROOF INTRODUCTION Indumart ENP225 Electropnumatic Positioners compare the electric signal (mA or VDC) with the actuator's position, generating a pneumatic output signal from 0 to100psi(0to7bar). The standard internai cam has a profile which grants a linear relation between the input signal and the actuator stoke. The profile can be changed to optimize the performance of the positioner. The zéro and span adjustments are accessible from outside of the instrument. The instrument is available as single or double acting version. Depending on the process, linear, fast, slow or virgin cam profile should be specified. Being intrinsically safe for zone 0 groups MA and MB and IIC is a standard feature for the ENP225 Sériés. Optionally, the instrument can be ordered with explosion proof barriers. However, this option is only available for the models which accept mA input signais. Input 4 - 20 mA (standard), for other inputs see the ordering Input Signal Span 8...20 mA Adjustments Zero and span Input Resistance 270 Ωfor 4-20; 555 Ωfor 0-5 VDC Air Supply Pressure 20 to 100 psi (1.4 to 7 bar) Static Consumption 0.5 to 1.2 Nm3/h Load/Exhaust Capacity 4 Nm/h @ 20 psi (1.4 bar) 312 Nm/h @ 100 psi (7 bar) Open Loop Gain 100 min Stroke Limits 15 to 100 mm Angular Stoke of CamStd. mounting: 55° Dir: 90° Output0 - 100% of supply pressure Action Direct or reverse Ambient Temperature -20...+80°C Storage Temperature -40...+90°C Temperature Drift 0.4%/10°C (-10...+70°C) Supply Pressure EffectZero shifts 0.5% of the inputspan for every10 kPa change