Schneider Electric (Barber Colman) 2353-501 Relay

The Schneider Electric 2353-501 Pneumodular Diverting Relay is a precision-engineered pneumatic control relay designed for high-performance HVAC automation and pneumatic logic circuits. Operating within a 3 to 20 psig set point range, this Barber Colman crossover component utilizes a snap-acting SPDT switch mechanism to divert air signals between ports based on branch line pressure. When the signal pressure remains below the calibrated set point, the NO (Normally Open) and C (Common) ports are connected; once the signal exceeds the set point, the internal diaphragm shifts to connect the NC (Normally Closed) and C ports. Featuring a tight 0.3 ± 0.1 psig differential, the 2353-501 ensures stable pressure-sensitive switching and prevents short-cycling in pneumatic terminal unit controllers. Its Pneumodular mounting design allows for seamless integration into existing Schneider Electric control panels, providing reliable sequence control for complex commercial HVAC systems and industrial process loops.

• Precision Switching: Narrow differential of 0.3 psig ensures accurate pneumatic signal diversion without hunting.
• Flexible Calibration: Adjustable set point range from 3 to 20 psig accommodates various pneumatic control system requirements.
• Modular Design: Compatible with Pneumodular manifold systems for rapid field replacement and reduced downtime.
• Durable Construction: Built for industrial HVACR environments with high-grade internal components for consistent mechanical action.

Common Questions & Support

What is the maximum supply pressure for this diverting relay?
The unit is typically rated for a maximum ambient temperature of 140°F and can handle standard pneumatic main air pressures up to 30 psig, though the control signal range is optimized for 3 to 20 psig.

Can the 2353-501 replace older Barber Colman 2353 series units?
Yes, this is the direct functional replacement for legacy Barber Colman 2353-501 models, maintaining the same port configuration and mounting footprint for HVAC retrofit projects.

How do I adjust the set point on this relay?
The set point is adjusted via the calibration screw. Technicians should use a calibrated pneumatic test kit to verify the snap-action pressure reaches the desired psig threshold before finalizing installation.

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.