unD3IO
User Manual
Attero Tech LLC 2018
Page 6
614-00017 Rev 05_a
2.1 – Mounting
A typical installation will involve mounting the wall plate into the wall using an “old-work” type bracket or a pre-
mounted wall box. Before starting, make sure the wall box where the unD3IO is to be installed is pre-wired with a
suitable cable back to a PoE enabled network switch or mid-span injector. If a mid-span injector is being used, the
cable should be connected to the port that supplies both Ethernet and power (refer to the manual for the midspan
injector if unsure which port is which).
*Note:
All Attero Tech products are tested using UTP cabling and it is recommended that UTP cabling be used when
installing them. STP cabling can be used for installation though care must be taken not introduce grounding issues into
the system by doing so.
Attach the network cable from the switch/mid-span injector to the Dante I/F port of the Dante unD3IO. If the switch or
mid-span injector is already running and PoE is enabled, the unit should power up and the green ID LED on the front of
the device should turn on.
With the cable attached, carefully place the unD3IO into the wall box taking care to not trap the cabling. Once fully in
place, secure with the screws provided. Once the unit is secured in the wall box, fit the Decora plate and secure it with
the screws provided with it.
2.2 – Hardware Connections
The unD3IO accepts and drives either unbalanced or balanced audio devices. Refer to the following diagrams and
instructions for connecting different types of audio devices. Professional grade audio cabling is recommended to
achieve the best audio performance throughout the system.
2.2.1– Balanced Source to Balanced Sink
To connect balanced sources to the unD3IO XLR input or connecting a balanced sink to the unD3IO XLR output, use a 2-
core cable with a shield and connect positive output to positive input, and negative output to negative input using the
cable cores, and connect output ground to input ground using the cables shield.
+
Source
+
-
Sink
Shield
-
Figure 2 - Balanced Source to Balanced Sink Connection
2.2.2 – Unbalanced Source to Balanced Sink
Use the following if using a single core cable with shield to connect a 2-wire unbalanced source to XLR input on the
unD3IO, or to connect an RCA or stereo jack unbalanced output signal from the unD3IO to a balanced input on another
device. Connect the positive output of the unbalanced source to the positive input of the balanced sink. Connect both
the source and sink input grounds together and short the negative input of the sink to ground at the input of the sink.
+
Source
+
-
Shield
Sink
Figure 3 - 2-Wire Unbalanced Source to Unbalanced Sink Connection
