MAMAC Systems EP-311-020 Electropneumatic Transducer

For high-performance HVACR control, the MAMAC Systems EP-311-020 Electropneumatic Transducer provides a precise interface between electronic controllers and pneumatic actuators. This 0-20 PSIG transducer utilizes 100% solid-state piezoresistive silicon technology to convert analog signals into proportional pneumatic pressure with ±1% full-scale accuracy. Designed for efficiency, the EP-311-020 features a no-air-consumption design, eliminating the continuous bleed common in older mechanical units. This model serves as the direct replacement for EP2100S, ensuring a seamless upgrade path for existing systems. The unit is field-selectable for 4-20mA, 0-5Vdc, or 0-10Vdc inputs and operates on a universal 18-28Vac/Vdc power supply. Built on a rugged aluminum manifold with brass barb fittings, it is engineered for long-term stability in demanding control environments. The EP311020 effectively isolates supply line pressure fluctuations, providing reliable pneumatic control signaling without the need for manual override components, making it ideal for fully automated Building Automation Systems (BAS).

• Zero Air Consumption: Advanced poppet valve technology eliminates wasted compressed air, reducing compressor load and operational costs.
• Universal Compatibility: Field-selectable analog to pneumatic input options (4-20mA, 0-5Vdc, 0-10Vdc) ensure integration with any standard HVAC controller.
• High Accuracy: The piezoresistive silicon sensor provides ±1% FS accuracy, maintaining precise 0-20 PSIG output for critical damper and valve modulation.
• Rugged Chassis: Features a small-footprint steel chassis and aluminum manifold that resists vibration and simplifies DIN rail or snap track mounting.
• Retrofit Ready: Specifically designed as an optimized EP2100S crossover, allowing technicians to replace obsolete transducers without re-piping or complex wiring changes.

Is the EP-311-020 compatible with multi-unit power setups?
Yes, it features a half-wave rectifier power supply. However, technicians should ensure that if multiple units share a transformer, the hot and neutral polarities are consistent to avoid ground loops or equipment damage.

Can this transducer be used for 3-15 PSIG applications?
While this specific model is calibrated for 0-20 PSIG, the MAMAC EP-311 series is versatile. For 3-15 PSIG requirements, the zero and span potentiometers can be field-adjusted to match your specific branch line requirements.

How does the lack of manual override affect commissioning?
The EP-311-020 is a "without manual override" model, making it ideal for secure, tamper-proof installations. For initial setup, use an analog signal generator to verify operation across the full span of the electropneumatic signal converter.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.