Powering access control with Power over Ethernet, like for IP cameras, has become increasingly common.
However, the demands for access power are greater than cameras, and the problems can be significant. Consider that, in access control, many devices may need power (e.g., readers, locks, door sensors). Plus, since access control impacts life safety, special concern needs to be taken to ensure that mistakes are not made in powering.
In this tutorial, we teach:
- Why PoE for Access Is Useful
- PoE versus PoE+ Use For Controllers
- Why 4 Doors Is Typically The Max PoE For Controllers
- How To Calculate PoE Power Load For Access
- How To Check Available Field Power
- The Code Impact Of Using PoE
- Cost Savings From PoE Powered Access
- 4 Common Problem Areas When Using PoE Powered Access
We then conclude with a 7 question quiz on PoE Powered Access Control to test your knowledge.
Where PoE For Access Is Useful
PoE is useful in retrofit access control to bring power to the door, instead of installing high voltage electrical for the system first, an expense that can often cost hundreds of dollars per door.
Without PoE, power at the door involves extending or running new circuits from breakers to openings in new conduit with new outlets, power supplies, enclosures, and junction boxes, while PoE routes power through the same cable that connects door devices to an ethernet network.