Johnson Controls CSD-CA1G1-1 Current Switch

For contractors managing motor loads and pump protection, the Johnson Controls CSD-CA1G1-1 is a professional-grade split-core current switch engineered for precise HVAC current monitoring. This unit features an adjustable trip point range of 1.25 to 135 Amps, allowing for fine-tuned calibration in over/under current sensing applications. The SPST normally open relay output (integrated status output) handles 10A at 260 VAC, while the 20-30 VAC/VDC actuation coil ensures seamless integration with standard 24V control circuits. Designed with a clamp-on split-core geometry, it permits installation on existing wiring without disconnecting conductors, saving significant field time. The onboard LED status indicator provides immediate visual confirmation of the electrical state, operating reliably across a 5 to 140 degree temperature range. This adjustable current sensing switch is a standard choice for verifying fan status, belt loss detection, and mechanical failure in building automation systems.

Key Benefits

• Flexible Installation: The split-core design allows for quick retrofit on existing motor leads without breaking the circuit.
• High Load Capacity: Equipped with a normally open SPST relay rated for 10A at 260 VAC, eliminating the need for auxiliary relays in many setups.
• Precise Setpoints: Featuring an adjustable setpoint threshold, technicians can accurately dial in the exact trip point required for specific motor FLA.
• Broad Compatibility: The 24V nominal actuation coil integrates directly with most HVAC controllers and DDC systems.
• Industrial Durability: Rated for 0-95% non-condensing humidity environments, ensuring performance in mechanical rooms and air handlers.

Common Questions

Is the CSD-CA1G1-1 compatible with VFDs?
No, this specific model is not designed for use with Variable Frequency Drives (VFDs) or Electronically Commutated Motors (ECMs). It is intended for standard 50/60 Hz constant speed applications.

Can I use this switch for undercurrent detection?
Yes, by adjusting the threshold, you can use the N/O contact to signal a loss of load, such as a broken drive belt or a sheared pump shaft.

Does this unit require an external power supply?
The CSD-CA1G1-1 utilizes a 20-30 VAC/VDC actuation coil to power the internal relay and electronics for reliable switching performance.

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.