Toa SX-2000 Series Manual - Manual (Page 59)

Chapter 5
SX-2100AO AUDIO OUTPUT UNIT
The SX-2100AO is an audio output unit for use with the SX-2000 system. It is equipped with 8
audio outputs, 8 control inputs, and 8 control outputs. In addition, one each of the SX-2000CI
Control Input Unit and SX-2000CO Control Output Unit can be cascade-connected to the SX-
2100AO, allowing the number of SX-2000 system's control inputs and outputs to be increased.
Two local audio inputs with control inputs are provided for the SX-2100AO's audio inputs.
Its main functions include an amplifier switching function that automatically switches the power
amplifier to the standby amplifier if the power amplifier fails, and a surveillance function that self-
diagnoses the speaker lines.
It is equipped with 2 channels of link connection terminals for connecting to two VX-2000DS or
VX-3000DS Emergency Power Supply units, allowing the backup power supply (one of the two)
to be activated when the main power supply fails, thus preventing system down.
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.
Two inputs can be mixed and output. The SX-2100AO receives audio signals from the SX-
2000AI or SX-2100AI Audio Input Unit by means of digital transmission in normal operating
condition. However, if no general broadcasts can be made due to system failures, the SX-
2100AO uses an analog transmission path to receive audio signals, enabling all-zone calls to be
made (referred to as "general urgency all-call" in this manual).
The SX-2100AO is equipped with 2 power inputs, allowing the connection of a backup power
supply for use during power failures. Level meters provided for each output channel allow
monitoring of audio output levels. Output volumes can be adjusted using the output 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 output channel can be monitored using the internal speaker. The key lock function,
designed to prevent accidental mistaken operation, can disable output volume control and
channel key settings.
* 1U size = 44.5 mm (standard size)