Ears-104
Commercial in Confidence
Copyright © 2021, all rights reserved by Exacom, Inc.
8
Fig 2. Ears Rear Panel
Analog Input Ports 1-4
: These ports can accept both RJ14 or RJ45 plug types but should be wired
according to Table 1. Wiring f ollows RJ45B standards.
Contact Closure:
In cases of Contact Closure where the equipment providing the Contact Closure circuit
does not have a bias voltage present, connect pins 1+7. Alternatively, if the device does provide a bias,
use pins 2+7 instead.
Grounding Screw:
As denoted by the electrical grounding symbol, this screw can be used to run a
jumper f rom the Ears device a common ground point with the audio source to better improve noise
rejection perf ormance.
AUX port
: Reserved f or special applications or integrations.
Network Port
: 10/100MBps LAN port
Utility:
Reserved f or Exacom, Inc. use only
Power Input:
The provided AC to 12V DC Converter can be plugged directly to this device. There is also
a location available f rom the supplies plug to attach a grounding wire via a screw terminal.
Table 1. Audio Input Wiring
PIN #
Function
1
Voltage Sense (+)
2
Voltage Sense (-)
3
Secondary Audio Tip (+)
4
Primary Audio Tip (+)
5
Primary Audio Ring (-)
6
Secondary Audio Ring (-)
7
Device Ground
8
Not Connected
