Two-Wire Control

One maintained switch energizes a coil, which pulls in a contactor to run a motor. The simplest motor control.

What you’re building

Steps

1. Add the parts

   Click Power Source, Single-Pole Switch, Coil, Contactor (3-pole), and Motor from the palette. Spread them out.

2. Label the coil and contactor

   Click the Coil and type the letter M. Click the Contactor and type M too. They now share a name — energizing coil M pulls in contactor M.

3. Wire the control circuit

   To wire, click the first terminal (it highlights), then click the second — a wire connects them. Click empty space to deselect. The maintained switch feeds the coil. A1 and A2 are the coil’s two terminals.

   Power Source L1 → Switch (left)

   Switch (right) → Coil A1

   Coil A2 → Power Source N

4. Wire the power circuit

   Now run motor-level power through the contactor’s main pole to the motor and back.

   Power Source L1 → Contactor T1 input

   Contactor T1 output → Motor (left)

   Motor (right) → Power Source N

5. Energize and flip the switch

   Click Energize. Close the switch — coil M energizes, contactor M pulls in, and the motor runs. Open the switch and it stops. Notice there’s no Start/Stop: the switch holds its own state. That’s two-wire control.