Schneider Electric (Barber Colman) 2373-501 Relay

The Schneider Electric 2373-501 is a precision-engineered pneumatic high-low selector relay designed for demanding HVACR control logic applications. Engineered as the direct functional replacement for AK-51832 and AK-51842, this unit effectively selects the highest and/or lowest output from up to six independent pneumatic input signals. Operating on a standard 20 psig main air supply, the 2373-501 utilizes proportional action to provide reliable signal discrimination in complex multi-zone systems. Technical specifications include a 0.5 SCFH air capacity at the HI output port and a 1.0 SCFH capacity at the LO output port, with a total air consumption rate of 1.5 SCFH. This selector is essential for maintaining precise pressure setpoints across various pneumatic controllers, ensuring system stability and preventing equipment short-cycling by isolating the most critical signal path in a control loop.

• Universal Signal Integration: Interrogates up to six discrete inputs to provide a single high or low reference signal.
• Drop-In Compatibility: Field-ready replacement for legacy Barber Colman AK-51832 and AK-51842 series components.
• Efficient Air Management: Low 1.5 SCFH air consumption minimizes the burden on the central compressed air system.
• Industrial Build Quality: Built for proportional control accuracy within 3 to 15 psig signal ranges.

Common Technical Questions

How do I handle unused input ports on the 2373-501?
Unused input ports must be left open to the atmosphere if they are not receiving a signal; do not plug unused ports as it will interfere with the internal diaphragm logic and signal selection accuracy.

Can this relay be used for both high and low selection simultaneously?
Yes, the 2373-501 features dedicated ports for both the highest and lowest signals detected among the inputs, allowing for simultaneous monitoring of peak and minimum demands.

What is the maximum operating pressure for this selector?
While calibrated for a 20 psig main air supply, the unit is designed to handle standard pneumatic control signals typically ranging between 3 and 15 psig.

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.