Schneider Electric (Barber Colman) 2378-501 Relay

The Schneider Electric (Barber Colman) 2378-501 Relay is a high-performance pneumatic amplifying relay designed for proportional signal control in HVAC systems. Engineered as a Pneumodular component, this device provides a definitive 2:1 amplifying function, doubling the input signal pressure to the branch line. This is essential for contractors managing larger actuators or terminal units that require higher pressure than the standard controller output. As the industry-standard C-202-1 replacement, the 2378-501 ensures seamless retrofitting into existing pneumatic panels while maintaining a 20 Psig main air operating pressure. With an 8 Scfh air capacity and a minimal 1 Scfh air consumption, this relay significantly reduces system lag and enhances the responsiveness of final control devices. Its rugged construction and proportional output make it a reliable choice for precise automation in commercial climate control environments.

• Precise 2:1 Signal Amplification: Accurately doubles pneumatic input signals for high-demand terminal equipment.
• Direct Retrofit Compatibility: Serves as the established replacement for legacy C-202-1 and Barber Colman pneumatic relays.
• Optimized Air Efficiency: High 8 Scfh flow capacity paired with low 1 Scfh consumption to maintain system air pressure.
• Field-Proven Performance: Designed for standard 1/8" NPT or Pneumodular manifold mounting for flexible installation.

Is the 2378-501 a direct replacement for the C-202-1?
Yes, this unit is the engineered successor to the Barber Colman C-202-1, matching its form, fit, and 2:1 ratio performance specifications.

What is the maximum air pressure for the 2378-501?
The relay is designed for a 20 Psig main air supply, though it can handle variations typical of commercial pneumatic control loops.

Can I adjust the bias on this amplifying relay?
Yes, the 2378-501 includes a bias adjustment feature, allowing technicians to fine-tune the output pressure to compensate for specific system offsets.

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.