User's Manual

How to Install the ISONAS PureIP Reader-controller 13
PoE Power Budget Calculations
When planning an installation using PoE, you need to assure that the PoE source (PoE Injector or
PoE equipped Network Switch) supplying the PoE power is sized properly for the power draw of all
the doors. To do this, you total up the power draw (in watts) of the PoE connections, and compare
that total power draw to the rated capacity of the PoE source.
Below is a chart of expected PoE power draws of the ISONAS Reader-controllers.
Door Location Configuration
PoE Power Requirement **
(Watts)
PureIP RC
2.3 Watts
PureIP RC with
Electronic Lock (300 mA @ 12V)
6.2 Watts
PureIP RC with
Electronic Lock (600 mA @ 12V)
10.4 Watts
*** Ethernet cabling power losses not included. Losses range from being negligible for short Cat5
cables up to about 16% for 100 meter Cat5 cables.
To meet the PureIP’s variable PoE power requirements, the PureIP will classify itself with the PoE
source as a “Class 0” PoE device. The power usage of a Class 0 device can range between 0.4 to
13.0 watts at the device (up to 15.4 watts from the PoE source).
Some network PoE equipment will budget and allocate it’s distribution of PoE power based upon the
maximum power usage of the each attached device’s classification. If your network equipment
uses this power provisioning technique, then you should budget 15.4 watts for each PureIP. Such
network PoE Equipment may allow you to manually configure the amount of power that should be
allocated to each device. Configuring the PoE equipment for an allocation of 3.0 watts or 11.0 watts
per connection would be appropriate. When powering from POE or POE+, in order for the system
to be UL294 V6 compliant, the Power Sourcing Equipment (PSE) injector or end point must be
compliant to UL294 or UL294B standards.
2.1.2: ADDITIONAL POWER OPTIONS
Most installations will use PoE for the PureIP and door locks.
That is a clean way to control a door using a single, standard network cable.
There are many additional options available, that can be used, if the door location requires more
power than a standard PoE-powered PureIP can provide.