DIP-Switch
A DIP-switch assembly provides manually selectable contact states. The board can read them as configuration choices; the switch itself does not define the meaning of each setting.
Operating a slide or piano actuator changes its contact connection and leaves it in the selected position. Rotary coded versions have their own contact patterns. Use the exact terminal diagram rather than assuming every DIP-switch assembly has the same internal connections.
In plain terms
A row of tiny settings levers. Each position records a choice that the surrounding circuit interprets.
Why designers use it
- Providing visible hardware configuration settings.
- Selecting supported modes without a display or menu.
- Keeping a manually selected setting without software storage.
Best for
- Board configuration
- Hardware mode selection
- Infrequent manual settings
Key specifications
- Contacts: Number of positions and exact connection pattern
- Electrical ratings: Switching and steady-state limits
- Assembly and handling: Pitch, mounting, force, soldering and cleaning requirements
When not to use it
- For a load exceeding the exact contact voltage or current rating, including switching transients.
- As a substitute for an emergency-stop or safety-rated isolation device.
- Where the specified environment, operating force or life is unsuitable.
Common mistakes
- Leaving an actuator between valid positions.
- Exceeding switching ratings because steady-state current looks small.
- Using excessive force or unsuitable sharp tools.
- Assuming a washable model is suitable for submerged operation.
Where you will find it
- A configuration circuit can assign meanings to a bank's ON/OFF states.
- Omron distinguishes slide, piano and rotary DIP-switch handling and warns that an incorrectly aligned position can produce incorrect signals.
A short history
DIP switches are a family of small configuration controls rather than one universal mechanism. Omron's precautions distinguish actuator styles, contact ratings, assembly processes and cleaning restrictions. Select the exact product and its connection diagram before designing the board.
Good to know
- The switch stores a mechanical position, not the software meaning of that position.
- A part that tolerates a controlled cleaning process is not necessarily waterproof in use.