Harman AXYS TUNNEL IndustryAmp Dante TUN-590404, Installation & User Manual, Page: 18 / 20

AXYS
®
IndustryAmp-DN User Manual Rev 3.0
201911/IAMPDN_3.0 18
PRESETS
In addition to retaining all current parameters and settings
in non-volatile memory so that the amplifier resumes
the same operational status after a power failure, the
IndustryAmp also has seven further internal memories
(Presets), each of which may contain an alternative unit
configuration. These Presets are normally accessed via
WinControl, but any third-party control system capable of
transmitting the AxysBridge control commands via UDP/IP.
(e.g. Crestron, AMX, etc.) may also be used.
One of the Presets may be assigned as an Emergency Preset,
and automatically loaded in the event of loss of network
communication. In the case of Dante
™ equipped models in
life-safety systems, it is generally advisable to provide an
analogue backup audio feed and configure the amplifier to
switch to a Preset including this in the event of a network
failure. See the WinControl Help files for full details.
DSP BYPASS
The IndustryAmp’s DSP system is continually monitored for
correct operation, and in the event of failure, both analogue
inputs are connected directly to the inputs of all amplifier
power stages. This failsafe bypass ensures that the primary
audio inputs always feed the loudspeaker system, even in
the event of a major failure. The conditions for bypass are
configurable from WinControl Service version. By default,
a ‘DSP not running’ condition triggers the bypass action.
As with all other internally-monitored amplifier functions, a
DSP failure is reported to the WinControl server via Dante
™
AxysBridge, as well as triggering the external failure relay
(if configured to do so).
LOAD MONITORING
The amplifier channels are equipped with current-
sensing load monitoring. This operates in the ultrasonic
range, at 22 kHz.
For correct operation, the system must be calibrated with
the normal loads connected to each amplifier channel to
establish a reference load current. After calibration, any
partial or total failure of any of the loads (or cabling)
will be registered as a deviation of load current from the
reference level. Load monitoring enabling and calibration is
carried out using WinControl. Failure of a load monitoring
test may be set to trigger the failure relay, if wished. See
the WinControl Help Files for further information.
AMPLIFIER PROTECTION
Surge protection
Each channel of the power amplifier stage is equipped
with gas discharge surge protection devices connected
between each output terminal (100 V, 70 V and 0 V) and
ground These are designed to withstand high-energy
voltage spikes of up to 4 kV to protect the amplifier output
devices from damage. The amplifier output stages also
incorporate clamping diodes to provide protection from
lower amplitude voltage spikes.
Power-on delay
When the IndustryAmp is powered-up, the amplifier output
terminals are disconnected from the amplifier power
stages themselves by internal relays for a short period, to
allow the internal voltage rails to stabilise and prevent any
unwanted surges from damaging the loudspeakers.
You will hear a click a few seconds after turning the
amplifier on and the front panel Status LED will go from
red to green; this is normal operation.
DANTE
™
CONFIGURATION
The Dante ™ card fitted to Models PB-400-DN and PB-
800-DN is self-organising and requires no adjustments.
However for configuring systems with multiples of PB-
400-DN/PB-800-DN units, each amplifier must have been
assigned a unique IP address. This, as well as the audio
routing, is defined using Audinate’s Dante
™ Controller
software application. For systems that incorporate one or
more AXYS
® WinControl Server PCs for system management,
this application will be pre-installed on each computer.
This topic is beyond the scope of this manual, and further
information can be found in the documentation related to
the WinControl Server configuration.