Powering access control with Power over Ethernet is becoming increasingly common.
However, access requires more power than cameras, and the problems of not having enough are significant, especially if unsecured doors, unresponsive doors, or dead readers are the result. Considering access impacts life safety, special effort 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
At the end, take the 7 question quiz on PoE Powered Access Control to test your knowledge.
Note: This guide was initially published in 2015 and substantially updated in 2018.
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.