Multiple Start/Stop Stations

Control one motor from two locations: stops in series, starts in parallel.

What you’re building

Steps

1. Build a start/stop/seal-in

   Start with the standard circuit: Power Source, Push Button NC (Stop A), Push Button NO (Start A), Coil M, NO Contact M (seal-in), Contactor M, Motor.

2. Add a second station

   Add a second Push Button NC (Stop B) and a second Push Button NO (Start B).

3. Wire both Stops in SERIES

   Chain the two Stop buttons one after another, so pressing either one breaks the circuit. This is a safety rule — any stop must work.

   Power Source L1 → Stop A (left)

   Stop A (right) → Stop B (left)

   Stop B (right) → continue to the Starts

4. Wire both Starts in PARALLEL

   Put Start B across Start A (both bridging the same two points), so either one starts the motor. The single M seal-in still bridges across both.

   Stop B (right) → Start A (left) — and Start B (left)

   Start A (right) — and Start B (right) → Coil A1

   (M seal-in NO Contact bridges across the Starts) →

5. Finish and test

   Wire Coil A2 to N, and the motor through the contactor. Energize. Confirm: either Start runs it, either Stop drops it. Series Stops = any stop works; parallel Starts = any start works.