Johnson Controls CSD-CA1G0-1 Current Switch

The Johnson Controls CSD-CA1G0-1 is a high-performance split-core current switch engineered for precise HVAC motor status monitoring and load detection. Designed for seamless integration into existing BAS (Building Automation Systems), this adjustable setpoint threshold sensor allows technicians to calibrate the trip point between 1.5 to 200 Amps, making it ideal for detecting belt loss or motor failure in commercial air handlers and pumps. Its clamp-on current sensor design eliminates the need to disconnect power leads, significantly reducing installation time in crowded control panels. The unit features an integrated LED status indicator for real-time visual diagnostics and a Normally Open (N.O.) solid-state output rated for up to 30VAC/DC. Operating effectively within a 5 to 140-degree temperature range and 0-95% non-condensing humidity, this current switch ensures reliable over/under current sensing in demanding mechanical room environments.

• Split-Core Construction: Facilitates rapid retrofitting without interrupting high-voltage wiring circuits.
• Broad Sensing Range: Supports a wide amperage spectrum, adaptable for both fractional and large horsepower motors.
• Visual Diagnostics: High-visibility LED provides immediate onsite confirmation of load status and setpoint crossing.
• Rugged Reliability: Constructed to withstand the thermal fluctuations common in industrial HVAC mechanical rooms.

How do I calibrate the setpoint for a specific motor?
With the motor running at normal load, adjust the multi-turn potentiometer until the LED changes state, then further refine the setpoint to account for typical fluctuations in current draw.

Can this switch be used for belt-loss detection?
Yes, by setting the threshold just below the motor's loaded amperage, the switch will drop the signal if the load disappears due to a broken belt or coupling failure.

Does this unit require an external power supply?
No, the CSD-CA1G0-1 is self-powered via induction from the monitored conductor, simplifying the wiring to the controller.

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.