Schneider Electric (Barber Colman) 2390-505 Switch

The Schneider Electric (Barber Colman) 2390-505 is a professional-grade minimum position switch engineered specifically for technical pneumatic control systems. Designed with an internal high-pressure selector relay, this unit is the standard for maintaining code-required minimum outside air (OA) levels in HVAC damper control applications. It delivers a precise 5 psig span output, making it ideal for managing proportional pneumatic actuators that operate within that specific range. Operating at a standard 20 psig main air pressure, the device balances efficient performance with a low air consumption rate of just 29 SCIM and an air capacity of 8 SCFH. Field installation is streamlined via dual-purpose barbed nipples, which securely accept 1/4" O.D. or 5/32" I.D. pneumatic tubing. This pneumatic pressure switch is essential for technicians regulating mixed air temperatures and remote positioning of final control devices in commercial automation environments.

• Internal High Select Relay: Automatically selects the higher of two pressure signals to maintain minimum damper positions for ventilation compliance.
• Precise 5 PSI Span: Tailored for proportional action in actuators requiring a exact 5 psig range for accurate positioning.
• Versatile Mounting: Compatible with TAC Pneumodular sockets or direct panel-face mounting for flexible retrofit or new-build integration.
• Low Operating Cost: Minimal air consumption (29 SCIM) reduces the load on the pneumatic air compressor system.

How do I adjust the output range on the 2390-505?
The adjustment knob features a 300-degree rotation that shifts the 5 psig span. Use a 3/32" hex wrench to loosen the knob, set your midpoint, and retighten to calibrate the starting pressure.

Can this switch be used with 10 psig span actuators?
No, this specific model is calibrated for a 5 psig span. For 10 psig applications, the 2390-510 is the correct technical substitute to ensure proper signal response.

What tubing is required for the barbed connections?
The integrated barbed fittings are engineered for a tight seal with standard 1/4" O.D. or 5/32" I.D. plastic pneumatic tubing.

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.