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HAND-OFF-AUTOMATIC CONTROLS Recognize hand-off-automatic switches on a schematic diagram. Hand-off-automatic controls are used to permit an operator to select between automatic or manual operation of a motor. The circuit shown in Figure 27–1 permits a motor to be operated by a float switch or to be run manually. The switch is shown as a single-pole…

Wiring diagrams, sometimes called “main” or “construc-tion” diagrams, show the actual connection points for the wires to the components and terminals of the controller. They show the relative location of the components. They can be used as a guide when wiring the controller. Figure 1 is a typical wiring diagram for a three-phase mag-

the wiring diagrams (heavy lines). A wiring diagram gives the necessary information for actually wiring-up a group of control devices or for physically tracing wires when trouble-shooting is necessary. A line diagram gives the necessary informa- tion for easily following the operation of the various

TYPICAL WIRING ¶ Connector numbers ... The above wiring diagram assumes your magnetic starter has a 240V coil. ... The Auto/Hand/Off is sometimes an integral part of a factory pressure switch. Auto allows for unattended, automatic starting of the compressor when the air pressure in the tank falls below the preset limit. Hand ...

These are the wiring diagrams for lighting and heating contactors. 20A CLM Lighting Contactor Typical Photocell 2W Acc · 20A CLM Lighting Contactor. ... Blower Motor Wiring Diagram For Mustang. wiring. The Hands/Off/Auto Switch controls the operation of the Lighting Control Contactor.

Typical Wiring Diagrams For Push Button Control Stations 3 Genera/ Information @ Each circuit is illustrated with a control circuit (continued) schematic or line diagram and a control station wiring diagram. l The schematic or line diagram includes all the components of the control circuit and indicates their function.

Hand Off Auto HOA controls are a very common and versatile control circuit which allows both automatic and manual operation. It allows loads such as motors, solenoid valves, electric cylinders, etc. to be controlled by some automatic operation such as a sensor or PLC plus allows you to easily turn the load on manually or off manually.

Wiring Diagram Book A1 15 B1 B2 16 18 B3 A2 B1 B3 15 Supply voltage 16 18 L M H 2 Levels B2 L1 F U 1 460 V F U 2 L2 L3 GND H1 H3 H2 H4 F U 3 X1A F U 4 F U 5 X2A R Power On Optional X1 X2115 V 230 V H1 H3 H2 H4 Optional Connection Electrostatically Shielded Transformer F U 6 OFF ON M L1 L2 1 2 STOP OL M START 3 START START FIBER OPTIC ...

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The most common use of 3 wire control is a Start/Stop control. See image below for an example of 3 wire control being used to pull in a contactor to start a 3 phase motor.