The THAYER series of PCA’S (Power Control Assemblies) accept standard AC power sources and converts them to an adjustable output capable of controlling typical driving devices, such as AC or DC Motors and Vibratory trays.
The PCA is available with many standard and optional features, such as; open chassis and enclosed style options, Local/Remote Operator Station options and communication options. Each assembly contains Protective Fusing, Input/Output Connection Terminal Strip, Electronic Drive Controller, and other related components needed to complete a basic analog drive controller package.

Showing all 4 results

  • Variable Frequency AC Motor Drives

    THAYER SCALE uses a number of different Variable Frequency Controllers to match a particular applications unique requirement. For general application Thayer Scale will use either Allen Bradely Power Flex 40© or SEW Movitrac© LTE-B. Should a customer standardize on a particular manufacturer of controller Thayer Scale will try and use that brand as long as it meeds our standards for control and accuracy.

    Read More
  • AC Output Power Control Assembly (PCA)

    Thayer’s Power Control Assembly (PCA) or Drive Controller is designed to accept a standard 230-380-480VAC 3 Phase 50 or 60 Hertz Power Source. This unit takes the incoming AC line voltage and converts it to an adjustable frequency output by means of an Electronic Drive Controller. The Drive Controller is controlled by either a Manual Speed Potentiometer or by an External Input Speed Signal and can be used in applications that meet the following specification ranges:

    • ½ – 2 Horsepower
    • 380-480 VAC
    • 3 Phase Invertor Duty Induction Motors

    consult factory for higher horse power sizes.

    Read More
  • SCR/DC Output Power Control Assembly (PCA)

    The Thayer Power Control Assembly (PCA) is designed to accept standard AC Power Sources.

    This unit takes the incoming AC line voltage and converts it to an adjustable DC voltage by means of an SCR controller. The DC voltage’s amplitude is controlled by either a manual speed potentiometer or by remote current signal. The adjustable DC voltage is capable of controlling conventional shunt wound or permanent magnet DC motors.

    Read More
  • PCA-VIB for Electromagnetic Vibratory Feeders Power Control Assembly (PCA)

    The Power Control Assembly (PCA) or Drive Controller is designed to accept standard AC Power Sources. This unit takes the incoming AC line voltage and converts it to an adjustable output voltage by means of an Electronic Drive Controller. The Drive Controller is controlled by either a Manual Speed Potentiometer or by an External Input Speed Signal and can be used in applications that meet the following specification ranges:

    PCA-VIB-120 0-110 VAC Vibrating Tray Motors with a full load current rating of less than 15 amperes.
    PCA-VIB-240 0-220 VAC Vibratory Tray Motors with a full load current rating of less than 15 amperes.
    NOTE: Conventional electromagnetic vibrating tray motors (full wave rectification).

    Read More