Toa SX-2000 Series Manual - Manual (Page 26)

Chapter 3
SX-2100AI AUDIO INPUT UNIT
The SX-2100AI is an audio input unit for use with the SX-2000 system. It features modular
construction that allows it to handle from 2 to 8 inputs per unit. It is equipped with 16 control
inputs and 16 control outputs. It can be mounted in an EIA equipment rack (2U size*), and
multiple units can be installed in different locations with no need to centralize in one location.
The SX-2100AI transmits audio signals to the SX-2000AO or SX-2100AO Audio Output Units by
means of digital transmission in normal operating condition. However, if no general broadcasts
can be made due to system failures, the SX-2100AI uses an analog transmission path to transmit
audio signals, enabling all-zone calls to be made (referred to as "general urgency all-call" in this
manual).
The SX-2100AI is equipped with 2 power inputs, allowing the connection of a backup power
supply for use during power failures. Level meters provided for each input channel allow
monitoring of audio input levels. Input volumes can be adjusted using the input volume controls
on the front panel, however the maximum volume when the volume control knob is rotated fully
clockwise is a default value defined by the SX-2000 Setting Software.
Also, any input channel can be monitored using the internal speaker. The key lock function,
designed to prevent accidental mistaken operation, can disable input volume control and channel
key settings.
* 1U size = 44.5 mm (standard size)