Johnson Controls D350BA-1 Temperature Control

The Johnson Controls D350BA-1 is a high-performance System 350 Digital Temperature Display Module designed for precise monitoring in demanding mechanical environments. Built with a continuous 3-digit LCD temperature readout, this module provides real-time visibility into system performance with a wide sensing range of -40 to 121 degrees Celsius. Engineered for seamless integration, the D350BA-1 typically pairs with A350 Series controls via integrated 5-pin connectors, facilitating a modular setup that eliminates complex point-to-point wiring between units. The NEMA 1 high-impact thermoplastic enclosure ensures durability for DIN rail or surface-mount installations in commercial refrigeration, cooling towers, and HVAC plant rooms.

Technicians favor the Celsius scale display for its accuracy and the intuitive "Press for Setpoint" feature, which allows for instant verification of control parameters without interrupting system operation. By maintaining a 4 mA current draw, the module operates efficiently as a low-power communication component within the System 350 ecosystem. Whether you are managing boiler reset applications or industrial chillers, the D350BA-1 serves as a reliable diagnostic window, ensuring that thermal stages remain within critical tolerances to prevent equipment short-cycling or thermal drift.

• Modular Compatibility: Plugs directly into A350, A350E, A350P, or A350R control modules using a 5-pin interface for rapid field deployment.
• Extended Temperature Range: Supports a broad spectrum from -40°C to 121°C, making it suitable for both low-temp refrigeration and high-temp hydronics.
• Dynamic Setpoint Verification: Features a front-facing button that enables setpoint viewing while the system remains live.
• Versatile Mounting: Standardized housing allows for quick snapping onto 35mm DIN rails or direct surface mounting in control panels.
• High-Visibility Readout: The 3-digit LCD ensures clear data interpretation under various lighting conditions, reducing human error during maintenance checks.

Does the D350BA-1 require a separate power supply?
No, the module is powered directly through the 5-pin connector from the primary A350 control module, usually drawing only a 4 mA typical load.

Can I use this module with Fahrenheit sensors?
The D350BA-1 is specifically calibrated for the Celsius scale. For Fahrenheit applications, the D350AA-1 series is the correct technical match to ensure unit consistency.

Is this display module compatible with pressure or humidity modules?
This specific unit is engineered for temperature data. For pressure monitoring, utilize the D352 series, and for humidity readout, specify the D351 series to maintain technical accuracy.

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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.