Speed Controls

Price Standard ECM Speed Controller

The Price ECM speed controller is specifically engineered to interface with a high-efficiency ECM motor. This low voltage speed controller offers either full manual control (VIA an on-board dial), automatic control (modulation signal from terminal unit controller), or BAS (building automation system) control of the ECM motor. Switching between the two modes is easy: just apply the BAS signal and the controller will automatically switch over from manual (dial) mode to BAS mode.

There are is a total of four models of USC.

24 VAC ±10% @ 50/60Hz (2VA)
Operating Conditions: 32 °F to 122 °F [0 °C to 50 °C] 0% – 95% R.H. non-condensing
Storage Conditions: -22 °F to 122 °F [-30 °C to 50 °C] 0% – 95% R.H. non-condensing
Processor: 8-bit standard flash microcontroller
Inputs: 2 Analog (Dial input and BAS input)
Outputs: 3 Digital (GO signal to ECM, Vspd PWM signal @ 80.0 Hz, Green Status LED)
Connections: ¼ in. Spade Terminals – Recommend 18-22AWG copper wire
Dimensions: 2.5 in. by 3.8 in. [64 mm by 96 mm] (includes mounting plate)
Shipping Weight: 0.100 lbs [46 grams]
  • Low supply voltage (24 VAC).
  • Dual outputs to control up to 2 ECM motors.
  • Front facing Green Diagnostic LED – for easy troubleshooting.
  • On-board manual adjustment dial with front facing voltage taps for voltmeter hookup (no need to open electrical enclosure).
  • Building Automation System (BAS – 2 to 10 VDC) input for variable speed remote control.
Diagnostic LED
The Diagnostic LED blinks out the current status of the board. This information is used to determine if the speed controller is operating in Manual (Dial) or BAS (Building automation system) mode and if the current setting is OFF or CONTROL. Note: The Diagnostic LED repeatedly blinks out the sequential status code followed by a pause.
  • 1 Blink – Manual Off Mode
  • 2 Blinks – Manual Control Mode.
  • 3 Blinks – BAS Off Mode
  • 4 Blinks – BAS Control Mode

Building Automation System (BAS) Interface
The BAS interface accepts an industry standard 2-10 VDC signal from a controller or computer to vary the speed of the ECM motor. This allows remote control/shutdown of the ECM motor based on air requirements and/or occupancy modes. Note: turning off 24 VAC power to the ECM speed controller will turn off ECM motor.

  • 0-1 VDC BAS input – Manual Mode
  • 1-2 VDC BAS input – BAS Off Mode (recommend sending 1.5 VDC to turn off motor)
  • 2-10 VDC BAS input – Modulating control (0 – 100%)
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