Dual-location start/stop (two control stations)
Two operator stations that can each start and stop the machine: stops always in series, starts always in parallel.
Compressor room + point-of-use stationsLocal/remote pushbutton stations
Step 1 of 6
Step 1
Series the stops
From
X1 → Stop A → Stop B
To
Wire #2 bus
Conductor: 16 AWG
Every stop button in the system lands in series. Adding a third station means opening this string again — never parallel a stop.
Verify before moving on
- Press either stop and the wire #2 bus must go dead
Aux contacts & feedback
- If the remote station is more than a few hundred feet out, watch coil inrush voltage drop — go up a wire size or use an interposing relay at the starter.
- Add a lit stop button by feeding its lamp from a spare NO aux, not from wire #2 — a lamp across wire #2 can backfeed a small coil.
Before you land a wire
- Both stations must be able to stop the machine. A station that can only start is a lockout hazard.
- Label each station's E-stop separately; E-stops go in the same series string but must be maintained-contact twist-release.
Reference only. Terminal numbers vary by manufacturer — confirm against the actual device drawing and follow NEC/NFPA 79 and your site's electrical safety program.