Title: Momentary Buttons (Motor Controls) - Troubleshooting
Course: Troubleshooting Labs > Section: Sample Troubleshooting Component Pages

Momentary button - troubleshoot using resistance
NO contact: should measure no resistance when button is pressed
NC contact: should measure resistance when button is pressed

Common Component Failure Problems

- Button does not function as it should
  - Check voltage
  - Check wiring
  - Check resistance
  - Verify you are using the correct contact block
    - If not, replace the contact block with a correct one
  - Tabs on contact block are broken or worn
    - Replace the button with a new one
- Failed open or closed
  - Internal mechanical or electrical failure
    - Check continuity

Troubleshooting Instrumentation/Tools

- Multimeter (DC voltage setting)
- Multimeter (resistance setting)
- Multimeter (continuity setting)

Troubleshooting Step-by-Step Example

Additional Troubleshooting Information

Similar Parts:

- Lighted buttons
- Maintained buttons

Schematic for push button:

Where to Purchase:

Blue Buttons - Automation Direct

Green Buttons - Automation Direct

Red Buttons - Automation Direct

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