A “current to pressure” converter (I/P) converts an analog signal (4 to 20 mA) to a proportional linear pneumatic output (3 to 15 psig). Its purpose is to translate the analog output from a control system into a precise, repeatable pressure value to control pneumatic actuators/operators, pneumatic valves, dampers, vanes, etc. The IP210 is a loop-powered instrument, which eliminates the need for an external power supply (except for IP210-X120).
Principle of Operation
OMEGA's IP210 converts an analog signal (4 to 20 mA) to a proportional linear pneumatic output (3 to 15 psig). Its uncomplicated design and proven electromagnetic force balance deliver consistently high performance.
The IP210 provides a reliable, repeatable, accurate means of converting an electrical signal into pneumatic pressure. Its force balance principle is a coil suspended in a magnetic field on a flexible mount. At the lower end of the coil is a flapper valve that operates against a precision ground nozzle to create a backpressure on the servo diaphragm of a booster relay.
The input current flows in the coil and produces a force between the coil and the flapper valve, which controls the servo pressure and the output pressure.
Zero adjustment of the unit is made by turning a screw that regulates the distance between the flapper valve and the air nozzle. Span adjustment is made by varying a potentiometer, which shunts input current past the coil. An integral volume flow booster provides adequate flow capacity, resulting in fast response time and accurate control.
SPECIFICATIONS Accuracy: 0.5% FS Supply Sensitivity: 0.025% span per % supply pressure change Zero Adjustment: 5% FS Span Adjustment: 20% FS Operating Temp: -20 to 70°C (-5 to 160°F) Compensated Temp: -10 to 60°C (15 to 140°F) Thermal Effects: <0.1%/°C over operating range Input Resistance: <300 Ω Media: Oil-free, clean, dry air filtered to 25 µm Recommended Supply Pressure: 25 to 30 psig (filtered air) Max Supply Pressure: 80 psig (for IP210-X120: 135 psi) Min Supply Pressure: 10 psi above maximum output pressure Air Consumption (Leakage): 0.03 scfm Flow Rate: 10 scfm ≤60 psi; 0.06 <60 psi Response Time:
<30 psi: less than 0.5 s (10 to 90% step)
≥30 psi: 2 s Failure Mode: Upon electrical failure, the signal pressure falls to bleed pressure Pressure Port: ¼ FNPT Electrical Connection: DIN 43650 with screw terminals included Housing: IP65 rated, epoxy-painted zinc die castings Construction: Nitrile diaphragms, stainless steel/nylon flapper, nozzle and supply valve, integral surface mounting bracket included Weight: 1.7 kg (3 lb)
† All amounts shown in USD Note: IP210-X120 uses 3 wire 4-20 mA connection with external 12 to 24 volt power supply. All other models are 2 wire loop powered models. Ordering Example: (1) IP210-X15 is a current to pressure converter with 2 wire 4-20 mA input and 3-15 psig output , $625.00