48V PASSIVE POE ADAPTER

Product Information

MSTronic's series of DC to DC converters are a low cost and high reliability solution for those requiring 48VDC Power over Ethernet voltage from a 12, 18, or 24V battery system Adopts PoE technology that does not conform to the 802.3at/af/bt standard is considered to use passive PoE. Generally, passive PoE devices run on 18 to 48 volts. It is important to note that it may likely cause permanent electrical damage to the device if the wrong voltage is connected. 12 Volt, 24 Volt, and 48 Volt PoE Injectors These devices connect a wireless access point (WAP), PoE lighting, IP camera, or any IEEE 802.3af, IEEE 802.3at, and IEEE 802.3bt-powered device (PD) to a network switch. Power is then “injected” into an Ethernet cable. Typically, a PoE injector converts AC to DC to power these low-voltage PoE devices. Plug another Ethernet cable to connect the injector's Ethernet or Data port and the Ethernet switch.

IEEE 802.3at capable devices are also referred to as Type 2. An 802.3at PSE may also use LLDP communication to signal 802.3at capability. [38] Power levels available [39] [40] Class

Planning for Cisco IP Telephony > Network Infrastructure Analysis". Archived from the original on 2011-07-08 . Retrieved 2010-01-12. 2010-01-12 ciscopress.com Power management features and integration [ edit ] Avaya ERS 5500 switch with 48 Power over Ethernet ports A proprietary high-power development called LTPoE++, using a single Cat 5e Ethernet cable, is capable of supplying varying levels at 38.7, 52.7, 70, and 90W. [51] Microsemi [ edit ] A PoE injector usually has two RJ45 ports, one labeled Data In and one labeled PoE/Data Out. Following is an overview of what each of these ports does. Data In port

Plug the Ethernet cable into the PoE injector’s PoE/Data Out port, then connect the other end of the cable to the IP camera’s PoE port. Understanding the Cisco IP Phone 10/100 Ethernet In-Line Power Detection Algorithm - Cisco Systems". Archived from the original on 2009-02-02 . Retrieved 2010-01-12. 2010-01-12 cisco.com The PSE, not the PD, decides whether power mode A or B shall be used. PDs that implement only mode A or mode B are disallowed by the standard. [34] The PSE can implement mode A or B or both. A PD indicates that it is standards-compliant by placing a 25kΩ resistor between the powered pairs. If the PSE detects a resistance that is too high or too low (including a short circuit), no power is applied. This protects devices that do not support PoE. An optional power class feature allows the PD to indicate its power requirements by changing the sense resistance at higher voltages. The original IEEE 802.3af-2003 [1] PoE standard provides up to 15.4W of DC power (minimum 44 V DC and 350mA) [2] [3] on each port. [4] Only 12.95W is assured to be available at the powered device as some power dissipates in the cable. [5]

Key Features

The IEEE 802.3at-2009 [6] PoE standard, also known as PoE+ or PoEplus, provides up to 25.5W of power for Type2 devices. [7] The 2009 standard prohibits a powered device from using all four pairs for power. [8] Both of these standards have since been incorporated into the IEEE 802.3-2012 publication. [9]