Basic Switching Pre-Training

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Slide 1:

Intelligent Motor Control for Automated Lifestyles Pre-Training Video #2 : Basic Switching

Basic Electrical Circuit::

Basic Electrical Circuit: Intelligent Motor Control for Automated Lifestyles SOURCE LOAD

…add a switch:

…add a switch Intelligent Motor Control for Automated Lifestyles SOURCE LOAD

Turn off the light…:

Turn off the light… Intelligent Motor Control for Automated Lifestyles SOURCE LOAD

The Three Types of Switches:

The Three Types of Switches SPST ( S ingle P ole S ingle T hrow) SPDT ( S ingle P ole D ouble T hrow) DPDT ( D ouble P ole D ouble T hrow) Intelligent Motor Control for Automated Lifestyles

SPST Switches:

SPST Switches Wall Switches / Dry Contacts SPST ( S ingle P ole S ingle T hrow) Maintained - Light Switch Momentary – Doorbell Most common electrical devices in a home use “Single Throw” switching Lights Ovens Fans Etc. Intelligent Motor Control for Automated Lifestyles Open Stop Close? For Motorized Applications these switches don’t do the job: ?

SPDT Switches:

SPDT Switches SPDT – ( S ingle P ole D ouble T hrow 120 VAC Wall Switches / Dry Contacts 3 – position, either Maintained or Momentary Motorized Products use “Double Throw” switching Shades Drapes Blinds Projector Lifts Etc. Intelligent Motor Control for Automated Lifestyles Open Stop Close

SPDT Switching:

SPDT Switching When the switch is activated in direction 1, the switch contact applies power to Motor Wire 1, energizing it to run in direction 1.

SPDT Switching:

SPDT Switching When the switch is activated in direction 2, the switch contact applies power to Motor Wire 2, energizing it to run in direction 2. Note: Color coding isn’t always consistent in the wiring!

DPDT Switching With AC Motors:

DPDT Switching With AC Motors

DPDT Switching With AC Motors:

DPDT Switching With AC Motors

DPDT Switching of DC Motors:

DPDT Switching of DC Motors DPDT switches are used to invert polarity to DC motors Power is applied to two different terminals. Terminals are crossed to invert polarity output. Contactors

DPDT Switching of DC Motors:

DPDT Switching of DC Motors When the contactors are in the upper position, the motor runs counter clockwise.

DPDT Switching of DC Motors:

DPDT Switching of DC Motors When the contactors are in the lower position, the motor runs clockwise.

Slide 15:

Intelligent Motor Control for Automated Lifestyles …stay tuned for pre-training video #3: System Wiring

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