The CP-8500 Series electronic/pneumatic transducers handle a wide variety of pneumatic valve and damper applications that require a 3-15 psig control signal from an electronic controller output. The CP-8551 electro pneumatic transducer is a basic two-wire loop-powered unit with 4-20 mA input. The CP-8552 transducer is a 3-wire unit with a jumper-selectable input for 4-20 mA, 6-9 VDC or 0-10 VDC. The CP-8511 pneumatic transducers have a variety of jumper-selectable inputs, a pressure gauge, manual override, and 20 VDC power output for auxiliary components.