MAMAC Systems EP-321 Tristate Pneumatic Transducer

The MAMAC Systems EP-321 is a high-performance tri-state to pneumatic transducer designed for precise HVAC pneumatic control. This unit effectively bridges the gap between digital controllers and pneumatic actuators by converting a 24VAC/VDC tristate signal into a stepped pressure output. Engineered for reliability in building automation systems, the EP-321 features a 0-20 PSIG output range and a sophisticated pulse train mechanism that allows any triac or contact closure to drive pneumatic damper actuators and valves with extreme accuracy. The field-programmable travel time, adjustable from 5 to 25 seconds, ensures this electro-pneumatic transducer can be tuned to match specific system volume and leaks, providing stable branch line pressure without the need for additional regulators or filters. Its rugged aluminum manifold and low-wattage poppet valves ensure long-term durability and minimal maintenance in demanding commercial environments.

• Universal Input Compatibility: Supports 24VAC/VDC supply and accepts triac or dry contact signals for seamless integration.
• Precise Field Calibration: Features field-adjustable pulse width and interval via multi-turn trimmers to ensure exact actuator positioning.
• High Flow Performance: Boasts a 550 SCFM flow rate and high air capacity to quickly pressurize downstream pneumatic components.
• Compact & Robust Design: Built with a steel chassis and 1/4" brass hose barb fittings, optimizing panel space while maintaining 0 psig input/output differential.
• Visual Monitoring: Includes an integrated precision branch line gauge for immediate troubleshooting and status verification.

Can the EP-321 compensate for minor air leaks in the system?
Yes. By adjusting the field-programmable pulse width and interval, technicians can calibrate the unit to overcome system volume variances and small leaks, ensuring the actuator reaches its intended position.

What is the maximum supply pressure for this transducer?
The MAMAC EP-321 is rated for a maximum supply pressure of 30 PSIG, with a standard operating output range of 0 to 20 PSIG.

How does the pulse train convert an electronic signal to physical travel?
The unit resolves an increase or decrease signal into multiple steps. The width of these pressure pulses and the time between them dictate the speed and precision of the pneumatic actuator travel.

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.