Visual explainers
Use these pages to understand key wiring concepts visually before moving into full diagrams and project tools.
Power vs Data vs Relay
A simple visual explanation of the difference between power paths, data paths and relay/control paths in security wiring.
N/O vs N/C
A simple explanation of normally open and normally closed contacts and where they are used in security wiring.
Fail-Safe vs Fail-Secure
Understand the difference between fail-safe and fail-secure door hardware and why it matters.
PoE Switch vs NVR PoE Ports
A simple comparison between using a PoE switch and using the built-in PoE ports of an NVR.
Electric Strike vs Maglock
A practical comparison of electric strikes and maglocks for access control and intercom projects.
Wiegand vs OSDP
A simple visual guide to the differences between Wiegand and OSDP reader communication methods.
IP Intercom vs 2-Wire Intercom
A simple explanation of when IP intercom and 2-wire intercom approaches make sense.
When Cat6 Is Enough vs Fibre or Wireless
A simple visual explanation of when Cat6 is usually enough and when fibre or wireless bridge links should be considered.
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.
Best way to use these pages
- Start with the concept you want to understand.
- Open one or two related wiring diagrams.
- Use a calculator, builder or project planner to turn the concept into something practical.