the epc* is an electric to pneumatic transducer which converts an analog input signal to a proportional pneumatic output, modulating its control valve(s) to regulate the branch line pressure to the set point determined by the input signal. The epc* offers four selectable input ranges of 0 to 5,0 to 10,0 to 15 vdc and 0 to 20 ma. Output pressure ranges are jumper shunt selectable for 0 to 10,0 to 15 and 0 to 20 psig, and adjustable in all ranges. A 0-5 vdc feedback signal indicating the resultant branch line pressure, is also provided. This signal varies linearly with branch pressure range selected. Epc's are designed with electrical terminals on one end and pneumatic connections on the other, allowing for maximum convenience in wiring and tubing installation when panel mounted. The epc is a constant bleed interface with branch exhaust response time determined by the bleed orifice size and pressure differentials. If power fails to the epc, it will continue to bleed through the bleed orifice until branch pressure is zero psig.