Description
Johnson Controls S66AA-1 Electronic Fan Speed Control Overview
The Johnson Controls S66AA-1 is a professional-grade electronic fan speed controller and motor controller engineered for commercial HVAC applications. Designed to deliver precise, energy-efficient fan speed modulation, this unit features a built-in hard start capability to ensure reliable motor startup under demanding conditions. Its wide input voltage range and compatibility with industry-standard low-voltage and analog control signals make it a versatile solution for new installations and retrofit projects alike.
Key Features
- Electronic fan speed control with integrated hard start feature for reliable motor startup
- Wide line voltage input range: 120–277 Vac for broad application compatibility
- Low voltage input: 20–30 Vac for easy integration with standard control systems
- Analog control signal input: 1–10 Vdc for smooth, proportional speed modulation
- Start voltage: 50% of line voltage when hard start is not initiated, ensuring gentle motor engagement
- NEMA 1 enclosure for indoor installations, providing protection against dust and accidental contact
- Vertical mounting orientation for flexible panel and cabinet installation
Electrical Specifications
- Line Voltage Input: 120–277 Vac
- Low Voltage Input: 20–30 Vac
- Control Signal Input: 1–10 Vdc
- Start Voltage (without hard start): 50% of line voltage
- Enclosure Type: NEMA 1
- Mounting: Vertical
Application
The S66AA-1 is ideal for controlling single-phase PSC fan motors in commercial air handling units, fan coil units, and other HVAC systems requiring variable speed operation. The hard start feature is particularly valuable in applications where motor starting torque is critical or where the motor may experience high-inertia loads. The 1–10 Vdc analog input allows seamless integration with building automation systems (BAS) and DDC controllers for centralized speed management.
Why Choose the Johnson Controls S66AA-1?
- Reliable hard start capability extends motor life and reduces nuisance trips
- Wide voltage range simplifies specification across multiple building types
- NEMA 1 enclosure suits standard indoor electrical panel environments
- Compatible with BAS/DDC systems via 1–10 Vdc analog input
- Trusted Johnson Controls quality for long-term commercial HVAC performance
Reviews
There are no reviews yet.