Template:DCMotor ESTOP
New Phidget motor controllers include an E-Stop circuit that can be used to trigger a Failsafe state.
| E-Stop Input Terminals | Result |
|---|---|
| Shorted | Normal operation |
| Open | Failsafe state activated |
The E-Stop input is shorted with a jumper wire by default. If you would like to implement an E-Stop system, we recommend connecting a normally-closed (NC) switch to the E-Stop input.
Multiple Motor Controllers
If your project uses multiple motor controllers with E-Stops, we recommend wiring them separately because wiring them together can cause ground loops that introduce instability. The best solution is to buy a multi-throw E-Stop switch that provides a separate circuit for each controller.
You can search for on an electronics retailer like Digikey for a DPST-NC switch for two controllers, or 3PST/4PST for three or four.
Other Considerations
The E-Stop circuit does not physically interact with the supply voltage or the motor connection. You should not wire your motor, or your supply voltage to this circuit.
