Getting the New IEEE 802.3bt to Tango

Posted by Ronnie Pennington | Oct 29, 2019 12:33:59 PM

The Institute of Electrical and Electronics Engineers (IEEE) ratified a new PoE standard in September of 2018 that goes by several names. Officially it’s called 802.3bt, but many industry pros refer to it as 4PPoE (4 Pair PoE) – and it’s a game changer. 

Up until now, installers would typically connect an Ethernet cable with PoE to a device such as a camera, illuminator, access control panel, etc. With the new 4PPoE, we can actually power an entire access control system without the need to use high voltage – or an electrician – using the new Tango1B PoE driven power supply from Altronix.

So, how exactly does this work?

It’s much simpler than you think. Ethernet cabling can be run in the same pathways as access control and network cabling. Plug the Ethernet cable into the Tango1B and the magic starts to happen. Tango1B takes the 90W of 4PPoE coming from an IEEE 802.3BT power source such as an Altronix Netway8BT, Netway4BT or Netway1BT, and converts the 48VDC (which is considered nominal) to a regulated 12VDC and 24VDC output simultaneously. 

Additionally, the Tango1B has an 8–pin connector to allow stackable sub-assemblies such as the ACMS8 and PDS8 to plug right in on top of the board. These stackable sub-assemblies outputs are field selectable for 12VDC and 24VDC. 

A single Tango1B will output 72W, which is typically sufficient to power an 8 door system over a single Ethernet cable. And if 72W cuts it too close, install two Tango1B units to double your output – and you’ll still reduce overall installation costs by eliminating the need of a licensed electrician, dedicated conduit and electrical cable runs.

Topics: Access Control, Power Solutions

Written by Ronnie Pennington

National Sales Engineer