Johnson Controls P352AB-2 Pressure Control

The Johnson Controls P352AB-2 is a professional-grade System 350 electronic pressure control designed for versatile on/off switching in commercial HVACR systems. This SPDT relay output module provides a reliable interface for condenser fan cycling and compressor unloading, featuring an adjustable 0 to 100 psi setpoint and a 2 to 50 psi differential range. Engineered for seamless integration, it utilizes 5-pin plug-in connectors for rapid modular expansion with S352A stage modules and D352 display units. The unit requires 24 VAC power, typically sourced from a Y350R power module or a Class 2 transformer, ensuring consistent performance in demanding environments. Housed in a durable NEMA 1 thermoplastic enclosure, the P352AB-2 supports both 35mm DIN rail and surface mounting, offering technicians a flexible solution for high-precision pressure management and system protection.

• Modular Scalability: Easily expands via the System 350 modular design, allowing for up to five additional stage modules without complex rewiring.
• Field-Selectable Logic: Features internal jumpers for direct acting (DA) or reverse acting (RA) modes, adapting to various refrigeration requirements.
• Precise Troubleshooting: Integrated LED indicator provides immediate visual confirmation of the relay status, simplifying diagnostic checks in the field.
• Active Sensing: Compatible with P499 electronic pressure transducers, providing a high-accuracy ratiometric signal compared to traditional mechanical bellows.
• Industrial Durability: The high-impact case protects internal electronics across an ambient operating range of -30 to 150°F.

What is the maximum electrical rating for the relay?
The SPDT relay is rated for 10 amps non-inductive at 120/240 VAC, making it suitable for a wide range of pilot duty and motor load applications.

Can I use this control for high-pressure cutout?
Yes, by configuring the reverse acting mode jumper, the control can de-energize equipment when the pressure exceeds the setpoint.

How do I power the P352AB-2 if I don't use a Y350R module?
The unit can be powered by any standard 24 VAC Class 2 transformer connected to the designated power terminals.

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.