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T24 System Manual Part 1: System Overview

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1.4.3 Additional Devices For PoE Power Supply

By default, power is supplied to the T24 IP Video Door Station via the network cable that

is connected to the Ethernet terminal board behind the camera module. PoE injectors or

switches with integrated PoE power supply according to IEEE 802.3af can be used to

supply power to the network.

PoE+ According To IEEE 802.3at For Mx2wire+

If the T24 version with Mx2wire+ technology is installed, data and power are supplied to

the door station via a two-wire cable, which is connected to the network via an Mx2wire+

indoor unit. Due to the increased energy requirements of the Mx2wire+ technology, PoE

supply according to IEEE 802.3af is not sucient. A PoE injector/switch (performance

class PoE+ according to IEEE 802.3at) has to be used instead, or an external voltage

source (48 V DC) must be connected to one of the two Mx2wire+ units (info module

or indoor unit).

Switch Or PoE Injector?

A switch connects individual network-enabled devices to one another and delivers data.

In the case of a home network, this function is normally performed by an existing router

with multiple network ports, which is also capable of connecting to the Internet (such as

the Fritz!Box). In this case and if only one T24 door station needs to be supplied with power,

it is sucient to purchase one PoE injector.

When purchasing a switch with an additional PoE power supply, make sure that a sucient

number of ports are supported (this is especially important if other PoE-supplied devices

apart from the T24 are connected to the switch).

Furthermore, it is crucial that the switch fulﬁls all the requirements for using the PoE-supplied

door station outdoors (electromagnetic compatibility, lightning and surge protection through

galvanically-separated ports).

PoE switch

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Mobotix MX-KEYPAD1-EXT-SV Technical Information Seite 50