Power vs Data vs Relay
A simple visual explanation of the difference between power paths, data paths and relay/control paths in security wiring.
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 |
|---|---|---|
| Power | Carries operating voltage/current | PSU to lock, PSU to strobe, PoE power |
| Data | Carries network or bus communication | IP camera to switch, controller to network |
| Relay / control | Tells another device to switch or trigger | Dry contact to gate motor, relay to lock PSU |
Common mistakes
- Treating a relay output as if it supplies the lock current directly.
- Confusing network/data cable with guaranteed power supply.
- Not documenting which cables are for power versus control.
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.