Johnson Controls PSM24A24DAS Power Supply

The Johnson Controls PSM24A24DAS is a heavy-duty linear DC power supply designed for precise regulation in building automation and HVACR control circuits. As a veteran-grade 24VAC to 24VDC converter, this unit provides critical electrical isolation between input and output, protecting sensitive downstream controllers from line noise and voltage spikes. Operating at a 50/60 Hz frequency, it delivers a 300 mA adjustable output ranging from 1.5 to 28 VDC, making it an essential component for technicians calibrating actuators or powering low-voltage transmitters. The integrated 2-position on/off switch allows for safe field servicing without disconnecting primary leads, while the LED status indicator provides immediate visual confirmation of power activation. Built for durability, this track mount power supply includes MT212-4 mounting hardware, supporting both 4-inch and 2.75-inch tracks. With auto-reset thermal protection and overload safeguarding, the PSM24A24DAS ensures stable performance for critical I/O modules and BAS networking hardware in demanding environments ranging from -30 to 140?F.

• Isolated Linear Output: Provides a clean DC signal with 0.0016% ripple, essential for high-accuracy HVAC sensors and sensitive electronic controls.
• Field-Adjustable Voltage: Features an adjustable range of 1.5 to 28 VDC, offering the versatility needed to match specific equipment requirements on-site.
• Built-in Circuit Protection: Engineered with electrical and thermal overload protection that automatically resets, minimizing downtime and technician callbacks.
• Simplified Installation: Compact track-mount design with a pre-supplied MT212-4 track ensures quick integration into standard control panels.

What is the maximum current draw supported by this unit?
The unit provides a steady 300 mA output at 24 VDC. For lower voltage requirements, such as 12 VDC, the rated output is 125 mA.

Does this power supply require a specific mounting orientation?
No, the track-mount design allows for flexible horizontal or vertical mounting within a NEMA-rated enclosure or control cabinet.

Is the output isolated from the 24VAC input?
Yes, this model features full electrical isolation, which is critical for preventing ground loops and protecting networked building automation controllers.

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.