Why a Separate Lock PSU Is Often Used
A simple explanation of why a separate power supply is often used for electric strikes, maglocks and door hardware.
What this means in practice
This page is intended to make the concept visually clear before you move into a full wiring diagram or project plan.
Quick comparison
| Term | Meaning | Typical use |
|---|---|---|
| Separate lock PSU | Provides dedicated lock current | Reduces stress on controller/intercom outputs |
| Relay output | Acts as the switch/trigger | Tells the PSU when to feed the lock |
| Main benefit | Cleaner power design and fewer issues | Especially useful with higher-current locks |
Common mistakes
- Trying to power the lock directly from a weak logic output.
- Not planning common 0V/reference where required.
- Forgetting to fuse and document the lock supply.
Where this appears in real diagrams
FAQs
Can I use this page as a final design?
No. This page is a visual explainer. Use it to understand the concept, then confirm all details against the relevant product manuals and site requirements.
What should I open next?
Open a related wiring diagram, calculator, builder, or planning pack so the concept becomes part of a real project workflow.