Schneider Electric (Barber Colman) 2368-521 Relay

The Schneider Electric (Barber Colman) 2368-521 is a high-performance Pneumodular Electric-Pneumatic Relay engineered for precise 3-way, 2-position switching in commercial HVAC systems. This 24 Vac pneumatic relay utilizes a DPDT switching configuration, consisting of two independent SPDT circuits that allow for complex interlocking, diverting, and sequencing functions from a single electrical signal. When the 2368-521 relay coil is de-energized, the common (C) and normally open (NO) ports remain connected; upon energizing the coil via a 24V control circuit, the common (C) shifts to the normally closed (NC) ports, effectively transitioning pneumatic signals to the end device.

Designed for industrial-grade reliability, the Barber Colman 2368-521 operates with a 60 Scfh air capacity and a minimal 29 Scim air consumption. It is optimized for a main air pressure range of 20 to 25 Psig, with a maximum limit of 30 Psig. The unit features standard barbed nipples compatible with 1/4" O.D. or 5/32" I.D. tubing for straightforward integration into existing control panels. A critical feature for field technicians is the integrated Auto/Manual override switch located on the 2.2 VA coil assembly, permitting manual system cycling during power outages or commissioning. This EP relay must be installed on a TAC Pneumodular manifold socket (such as the 22-120) with appropriate gaskets to ensure a leak-free pneumatic interface.

• DPDT Multi-Circuit Control: Dual-pole architecture allows the simultaneous switching of two independent pneumatic lines, ideal for coordinating damper and valve actuators.
• Pneumodular Manifold Integration: Modern modular design facilitates rapid mounting and replacement within standard Schneider Electric pneumatic control banks.
• Manual Override Capability: The tactical Auto/Manual switch ensures system functionality can be maintained or tested without requiring active electrical signals.
• High Flow Efficiency: Delivers a substantial 60 Scfh air capacity while maintaining low pilot air consumption to preserve system-wide pressure stability.

Is the 2368-521 compatible with DC control circuits?
No, this specific model is a 24 Vac unit. For 24 Vdc applications, the 2368-520 is the correct technical equivalent.

What tubing size should be used for the barbed connectors?
The integrated barbed nipples are dual-rated for 1/4" O.D. polyethylene or 5/32" I.D. polyurethane tubing.

Does this relay require a specific mounting orientation?
While it can operate in any position, it is specifically designed for use with a TAC Pneumodular 22-120 manifold socket for proper port alignment and sealing.

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.