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120/208/240/277 Volt Fan Motor Speed Controller (Johnson Controls)

Price: $241.21
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120/208/240/277 Volt Fan Motor Speed Controller (Johnson Controls)


The S66 is designed to modulate the speed of a motor based on a 0 to 10 VDC input signal.

The input signal can be supplied by any external source including those referenced to temperature, pressure, humidity, or flow.

The S66 requires a 24 VAC power supply that is of the same phase as the AC voltage

(motor) being varied.


• hard start of motor

• built-in radio frequency interference (RFI)suppression


The S66 can be used with single-phase permanent split capacitor or shaded pole motors, which are approved by the motor and equipment manufacturer for speed control applications.

S66AA-1C Electronic Motor Control Line Voltage Range 120-277 VAC, 50-60 Hz Start Voltage 50% of line voltage Control Case Cold rolled steel, painted grey Enclosure NEMA 1

Wiring Connections 0-10 VDC 1/4 in quick connects Low voltage 1/4 in. quick connects

Line voltage 10-32 screw terminals

Mounting Vertical only, four holes for No. 10 screws Signal Input Impedance 10,000 ohms

Input Signal Voltage 0-10 VDC

Transient Protection

320 V surge suppression, exceeds IEEE 587 Standards

Low Voltage Input 24 VAC, Class 2 Ambient Temperature Range

• to 131
•F (-40
• to 55
•C) at 120 VAC;

• to 140
•F (-40
• to 60
•C) at 208-277 VAC

Replaces Part Numbers:S66AA-1C, CARS66AA1C.

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