Series EPTA Electro-pneumatic Transducer


Series EPTA Electro-pneumatic Transducer converts an analog input signal to a linearly proportionate pneumatic output by modulating its control valves to regulate branch pressure. All models incorporate two low voltage valves, an integral in-barb filter, an analog 30-psi gauge, an anodized aluminum manifold, and brass barbed fittings. The EPTA offers adjustable span and offset as well as manual override. This unit has no air consumption and is immune to mounting orientation. Field selectable output pressure ranges and input signal ranges ensure single unit compatibility with most systems. The standard models maintain branch pressure on power loss while the Fail-Safe models will drop the branch pressure to 0 psi on power loss alleviating the need for an external pneumatic safety switch. Mounting configurations include a metal bracket mount and snap-track mount. The A-400 DIN Rail Mounting Kit is also available for the snap-track mount model.


• Service: Clean dry air or any inert gas. • Input Signal: DC Current (4-20 mA) or DC Voltage (0-5/0-10/0-15). • Input Impedance: Current: 250 ohms; Voltage: Infinite. • Output Signal: Jumper selectable 0-10 psig (0-69 kPa), 0-15 psig (0-103 kPa), or 0-20 psig (0-138 kPa). • Feedback Output: 0 to 5 VDC. • Air Supply: 25 psig (172 kPa) maximum. • Air Flow: 750 scim. • Air Consumption: 0 scim normal operation, Fail-Safe model vents to 0 psi on power loss. • Accuracy: ±1.0% full scale @ room temperature; ±2.0% full scale @ 32 to 120°F (0 to 48.8°C). • Supply Voltage: 24 VDC (+10%/-5%) or 24 VAC (±10%) 50/60 Hz. • Supply Current: 180 mA maximum, 200 mA maximum on Fail-Safe model. • Temperature Limits: Operating: 32 to 120°F (0 to 48.8°C); Storage: -20 to 150°F (-6.7 to 65.6°C). • Operating Humidity Range: 5 to 95%, non-condensing. • Pressure Connections: 1/4" O.D. (polyethylene tubing optimum). • Electrical Connections: Plug-in block terminal type with 5 mm pin spacing. • Wire Size: Up to one 14 AWG per terminal. • Weight: EPTA-S0: 6.9 oz. (196 g), EPTA-S1: 9.2 oz. (261 g), EPTA-B: 14.5 oz. (411 g).
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