Eaton SONIX 350-d User manual

SONIXTM 350-d
Power Amplifier
Fuse
STATUS
AC
POWER SUPPLY
Power Amp Earth Line Fan Temp
Overload/
Shutdown
!
Audio Output
Local Ticktone
Sense Test
Local Reset
DC PSU DC Battery
Sonix 350-d
hsb Line Call
SonixTM 350-d Technical Manual

Sonix 350-d Technical Manual
Disclaimer of warranties and limitation of liability
The information, recommendations, descriptions and safety notations in this document are based on Eaton
Corporation’s (“Eaton”) experience and judgment and may not cover all contingencies. If further information is
required, an Eaton sales
ofce should be consulted. Sale of the product shown in this literature is subject to the terms and conditions outlined
in appropriate Eaton selling policies or other contractual agreement between Eaton and the purchaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER THAN THOSE
SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES
THE ENTIRE OBLIGATION OF EATON. THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR
MODIFY ANY CONTRACT BETWEEN THE PARTIES.
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability
or other-wise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not
limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional
expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting
from the use of the information, recommendations and descriptions contained herein. The information contained in
this manual is subject to
change without notice.
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Sonix 350-d Technical Manual
Glossary
Abbreviation Meaning
PA/GA Public Address and General Alarm
Sonix Sonix PA/GA System
A&B Duplicated PA/GA system architecture
N+1 Hot spare PA/GA system architecture
AB+ Sonix improved redundancy architecture
Hmi Human interface
BGM Background music
Tick-tone Short burst of tone repeated every few seconds, used to check the output of connected loudspeakers
Sense Test Periodic test carried by Sonix amplier to check integrity of 100 V line
100 V line High voltage loudspeaker connection line at nominal 100 V ac
MCB Miniature Circuit Breaker
RCBO Residual current circuit breaker with overcurrent protection
Unit ID/Number Unique identier assigned to each of Sonix module, used to identify it to the 2Mx and SAS.
Priority Number assigned to a Sonix audio source to facilitate system usage conict resolution, 31 (highest) to 1 (lowest)
PTT Push to talk
FAT Factory Acceptance Test
SAT Site Acceptance Test
Larson’s Effect When a microphone is acoustically coupled to the loudspeaker and generates feedback
2Mx Sonix 2Mx Central controller
Amp / 350-d Sonix 350 W Power Amplier with 100 V line output
Eol1 Sonix Remote End of Line unit
Eol8 Sonix Amplier to 100 V line interface unit (8 channel)
SP AD Sonix Intelligent loudspeaker monitoring unit
Hmi-Br Sonix intrinsically safe barrier (ATEX/IECEx) for connecting Hmi-5 in explosive atmospheres
Hmi-Mute Sonix 100V loudspeaker mute (Ex/SA)
Hmi-26 Sonix Human Interface access panel
Hmi-5 Sonix Small Human Interface access panel
Io Sonix Input / Output unit
Ms12 Sonix 12-message digital message store
Pbx Sonix Private branch exchange interface unit
Pm10 Sonix Power Management unit
Vw2 Sonix Beacon control and monitoring unit (2 channel)
SAS Sonix Administration Software
Amp Bus A 2Mx bus, used to communicate with and control Sonix Amplier units
HMI Bus A 2Mx bus, used to communicate with and control Sonix Hmi units
I/O Bus A 2Mx bus, used to communicate with and control Sonix input/output devices: IG, Io and Ms12
Beacon Bus A 2Mx bus, used to communicate with and control Sonix Vw2 units
Power Bus A 2Mx bus, used to communicate with and control Sonix Pm10 units
Global Bus A 2Mx bus, used to communicate with SAS application
Sync A 2Mx bus used to communicate with the second 2Mx unit when PA/GA system is congured as A&B, AB+ or N+1
system
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Sonix 350-d Technical Manual
CONTENTS
1 INTRODUCTION........................................................................7
1.1 Eaton quality assurance .....................................................................7
1.2 About the Product..........................................................................7
1.3 Key features ..............................................................................7
2 BEFORE YOU BEGIN ....................................................................8
2.1 Packaging ................................................................................8
2.2 Safe working practice.......................................................................8
2.3 In the box ................................................................................8
2.4 Required tools ............................................................................8
2.5 Recommended spares ......................................................................8
3 OVERVIEW OF THE UNIT ................................................................9
3.1 Front panel layout..........................................................................9
3.3 Specifications .............................................................................9
3.3.1 Weight and dimensions.................................................................9
3.3.2 Power and utility ......................................................................9
3.3.3 Environmental operating conditions ......................................................10
3.4 Installation and connectivity.................................................................10
3.4.2 Amp Bus ...........................................................................11
3.4.3 EOL-8 Bus ..........................................................................12
3.4.4 Hot Standby Bus and Hot Standby amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.4.5 350-d power source ..................................................................14
3.4.5.1 AC Input ..........................................................................14
3.4.5.2 48 V dc (battery) input ...............................................................14
3.4.6 Fault outputs ........................................................................15
3.4.6.1 PSU Fault .........................................................................15
3.4.6.2 Amp Fault .........................................................................15
3.4.7 Earth stud ..........................................................................15
3.4.8 Fusing .............................................................................16
4 SETUP AND CONFIGURATION...........................................................16
4.1 Audio Gain ..............................................................................16
4.2 Unit ID / Associated Zone ..................................................................16
5 UNIT OPERATION .....................................................................17
5.1 Front panel unit status indicators.............................................................17
5.1.1 Power..............................................................................17
5.1.2 Amp ...............................................................................17
5.1.3 Earth ..............................................................................17
5.1.4 Line ...............................................................................17
5.1.5 Fan ................................................................................17
5.1.6 Overload/Shutdown ...................................................................17
5.1.7 Temperature .........................................................................18
5.1.8 Hot Standby .........................................................................18
5.1.9 Audio Output Level ...................................................................18
5.1.10 AC Power status.....................................................................18
5.1.11 DC PSU status ......................................................................18
5.1.12 Fuse status.........................................................................18
5.2 Rear panel fault outputs....................................................................18
5.3 Front button operation .....................................................................18
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Sonix 350-d Technical Manual
5.3.1 Local Ticktone .......................................................................19
5.3.2 Sense Test ..........................................................................20
5.3.2.1 Eol 1 sense test ....................................................................21
5.3.2.2 Sense Test disable ..................................................................22
5.3.2.3 Restricted Sense Test and audio breakthrough . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.3.3 Local Reset .........................................................................23
5.3.4 Line Cal ............................................................................23
5.4 Audio broadcast .......................................................................23
5.4.1 All Call .............................................................................24
5.4.2 Post-amp switching ...................................................................24
5.4.3 Routine Speech disabled...............................................................25
5.5 Hot Standby amplifiers.....................................................................25
5.5.1 Zones and Hot Standby amplifier ...............................................26
6 UNIT DE-RATING ......................................................................27
7 UNIT CUSTOMISATION ................................................................27
7.1 70 V Line output ..........................................................................27
8 COMMISSIONING/TESTING ............................................................27
8.1 Before start .............................................................................27
8.2 Fault finding .............................................................................27
9 MAINTENANCE .......................................................................29
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Sonix 350-d Technical Manual
6 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com
LIST OF FIGURES
FIGURE 1. GENERAL, SIMPLIFIED VIEW OF THE SONIX 350-D’S FRONT PANEL. ....................9
FIGURE 2. GENERAL, SIMPLIFIED VIEW OF THE SONIX 350-D’S REAR PANEL.......................9
FIGURE 3. STACKING 350-D UNITS. ........................................................10
FIGURE 4. CONNECTING SINGLE 350-D TO 2MX MODULE. VIEW OF REAR OF THE UNITS. . . . . . . . . . . 11
FIGURE 5. CONNECTING MULTIPLE 350-D UNITS TO 2MX MODULE.............................11
FIGURE 6. TYPICAL CONNECTION BETWEEN 350-D AND EOL 8 UNITS. ..........................12
FIGURE 7. HOT STANDBY BUS CONNECTIONS. ..............................................13
FIGURE 8. MULTIPLE HOT STANDBY LOOPS. ................................................14
FIGURE 9. AC POWER INPUT ..............................................................14
FIGURE 10. 48 V DC (BATTERY) POWER SUPPLY...............................................14
FIGURE 11. FAULT OUTPUTS...............................................................15
FIGURE 12. RECOMMENDED EARTH CONNECTION FOR THE UNIT...............................15
FIGURE 13. FRONT BUTTON OPERATION ...................................................19
FIGURE 14. TICKTONE TRAVEL OVER FAULTY LOUDSPEAKER LOOP. .............................20
FIGURE 15. SENSE TEST SIGNAL WITH THE LOUDSPEAKER LOOP. ..............................20
FIGURE 16. FAILED SENSE TEST ...........................................................21
FIGURE 17. SENSE TEST FOR A SPUR 100 V LINE CONFIGURATION. .............................21
FIGURE 18. FAILED SENSE TEST WITH EOL 1 UNIT. ...........................................22
FIGURE 19. RESTRICTED SENSE TEST TIMEOUT. .............................................22
FIGURE 20. TWO ZONES 350-D SETUP: A) ZONE 1, B) ZONE 2...................................23
FIGURE 21. POST-AMP ZONE SWITCHING. ..................................................24
FIGURE 22. HOT STANDBY AMPLIFIER 100 V AUDIO PATH FOR A FAULTY AMPLIFIER. . . . . . . . . . . . . . . 25
FIGURE 23. HOT STANDBY 100 V AUDIO PATH FOR TWO FAULTY AMPLIFIERS. ....................26
FIGURE 24 - TEMPERATURE DE-RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
FIGURE 25 - AC VOLTAGE DE-RATING.......................................................27
LIST OF TABLES
TABLE 1. FRONT PANEL INDICATORS AND SWITCHES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TABLE 2. REAR PANEL CONNECTIONS.......................................................9
TABLE 3. AUDIO GAIN VALUES.............................................................16
TABLE 4. 350-D IDENTIFIER. ...............................................................16

Sonix 350-d Technical Manual
1 Introduction
These instructions are intended for all users who will
have to install, commission, configure and setup the
Sonix 350-d amplifier unit. It is assumed that you have
necessary electrical, electronic and telecommunications
experience to undertake the work. If in doubt, please
speak to your local Eaton representative.
1.1 Eaton quality assurance
Eaton design, manufacture, installs and commission all
our products to the highest standards of quality. This
quality process is embraced and adopted throughout the
group in all areas of our operations.
This is demonstrated by our compliance and strict
adherence to ISO 9001, 14001, ATEX, IECEX policies.
On receipt of the product, ensure that the cartons are
undamaged and that the contents are all correct and
complete.
Should this product reach you in an unsatisfactory
condition please report this to Eaton to enable us to
rectify and investigate the fault in a speedy manner.
1.2 About the Product
The Sonix 350-d power amplifier is a compact, 1U,
350 W PA/GA amplifier module, complete with power
supply, status panel and thermal management units. A
complete, sealed unit design: no need for sub frames
or cards which reduces the risk of failure between
distributed parts and dramatically reduces down-time in
the unlikely event of equipment replacement.
Sonix 350-d autonomously monitors and supervises the
amplifier, loudspeaker cable installation and loop integrity
with an inaudible signal. The robust and industrial design
of the 350-d amplifier ensures its protection against
open or short circuit, load deviation and abnormal loads
associated with field loop faults. Designed with safety
in mind, the 350-d automatically isolates its high voltage
outputs if any cable is inadvertently unplugged.
In the event of abnormally high ambient temperatures,
the 350-d is fitted with an intelligent, multi stage auto
reset/retry over temperature protection device that
isolates the unit until the temperature fault is rectified.
Internal power supply and fans are fully monitored to
ensure uninterrupted operation and life integrity.
Any detected faults are reported on the status panel and
communicated to the Sonix 2Mx central controller and
Sonix SAS application.
1.3 Key features
Sonix 350-d is designed to provide the following
features:
• 350 Watts power in 1U package
• Small footprint
• Patented high power efficiency (>92%) Sonix Parallel
Amplifier System (patent: GB 1300553.3)
• Real time high integrity field cable monitoring
• Compact and efficient design
• Low thermal emissions
• Support for Hot Standby configurations
• Operating on monitored internal/external self-healing
ring
• 8P8C (RJ45) connectivity for easy installation and
maintenance
• <1% AC/DC regulation
• High accuracy (+/- 0.5 dB) 100V line regulation
• Single active zone (1 to 30) or All-Call activation
• Support for post amplifier switching.
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Sonix 350-d Technical Manual
2 Before you begin
2.1 Packaging
In the interest of preserving the environment, Eaton
aims to use recycled packaging wherever practical.
Due to the physical nature of our products, we provide
adequate packaging to protect the goods during transit.
Please ensure that once unpacked, checked and
installed that all packaging is disposed of or recycled in a
responsible manner.
2.2 Safe working practice
Whilst working on or within the Sonix PA/GA system it
is our prime interest that you remain safe throughout.
During this work you may be exposed to potentially
hazardous voltages, currents, confined spaces and
potentially hazardous industrial environments. Prior to
undertaking any work please ensure relevant permits
and regulations are adhered to.
2.3 In the box
• 1 x Sonix 350-d Amplifier unit.
• 1 x Technical Manual
2.4 Required tools
• Flat blade screw driver (0.6x3.5) – for plug wiring.
• M5 (8mm) Nut spinner or spanner.
• Appropriate screw driver for cage-nut fixings.
2.5 Recommended spares
This item is sold as a complete module therefore no
spares are needed for a single unit replacement order.
However, if the unit is purchased as a part of a PA/GA
system, Eaton strongly recommend that and additional
10 percent of total number of amplifiers present in the
system to be carried as spares.
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Sonix 350-d Technical Manual
3 Overview of the unit
3.1 Front panel layout
Figure 1. General, simplified view of the Sonix 350-d’s front panel.
Item Description
1Power On indicator
2Unit health status indicators
3Hot Standby mode indicator
4Audio output volume indicator
5Power supply health status indicators
6User selection button
7User selection status indicator
Table 1. Front panel indicators and switches.
Figure 2. General, simplied view of the Sonix 350-d’s rear panel.
Item Description Notes
1Hot Standby Bus connections
RJ45 double-stacked sockets2Audio and data system connections
3100 V Line output connections
4DC power supply input (battery) Phoenix Contact 2-way pluggable terminal block
pitch: 3.81 mm
5Internal power supply fault status contact N/C contact outputs
6Amplifier fault status contact
7Fuse Time delay 10A size: 5 x 20 mm
8Earth point M5 stud for earth connection
9AC power supply input IEC 60320/C14 inlet
Table 2. Rear panel connections
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
DC PSU
DC Battery
POWER SUPPLY
AC
Fuse
Local Tickton...
Sense Test
Local Reset
Line Cal
1
2
3
4
5
7
6
Sonix 350-d
TM
R
!
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
AC Input
85-265 vac 50-60Hz
1
2
3
4
5
6
7
8
9
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
0 V+48 V
Sonix 2Mx
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
350-d
COMPLIANT
AC Input
85-265 vac 50-60Hz
110 or 230 V ac
50 - 60 Hz
N/C
com
N/C
com
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
DC PSU
DC Battery
POWER SUPPLY
AC
Fuse
Local Tickton...
Sense Test
Local Reset
Line Cal
1
2
3
4
5
7
6
Sonix 350-d
TM
R
!
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
AC Input
85-265 vac 50-60Hz
1
2
3
4
5
6
7
8
9
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
0 V+48 V
Sonix 2Mx
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
350-d
COMPLIANT
AC Input
85-265 vac 50-60Hz
110 or 230 V ac
50 - 60 Hz
N/C
com
N/C
com
3.3 Specications
3.3.1 Weight and dimensions
Un-packed: 4.5 kg
W x D x H (mm): 482 x 306 x 43
Fixing: 1U 19” industrial mounting
3.3.2 Power and utility
Voltage: 48 V dc (battery backup)
85 – 240 V ac (internally managed to
48 V dc +/- 0.5 %)
Current (quiescent): 125 mA
Current (MAX): 1.6 A (240 V ac)
3.4 A (110 V ac)
Power output: 350 W (+/- 1 dB)
Line voltage: 100 V (if 70 V line output
is required please contact
your local Eaton
representative)
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Sonix 350-d Technical Manual
3.3.3 Environmental operating conditions
Quiescent ambient: 0 °C to +55 °C
Continuous full load ambient: +40 °C
Short term full load ambient: +45 °C
Operating relative humidity: 20 to 95 % non-
condensing
3.4 Installation and connectivity
The Sonix 350-d is designed as a part of Sonix PA/GA
system and as such, bulk of the amplifier’s connections
are made with CAT6A cables and colour coordinated
with border around its rear RJ45 connectors.
Port name Colour Connected to Function
Amp Bus Green 2Mx / 350-d
Data and audio transmission
between 350-d and 2Mx
units
Eol 8 Bus Grey Eol 8 100 V Line output
Hot Standby White 350-d Standby amplifier 100 V Line
output
3.4.1 Physical installation
The unit is designed to be fitted inside the industry
standard 19” enclosure, fixed with appropriate size
screw. Depending on the rack and cage nuts used, they
can be either M5 or M6 fitted through four mounting
holes provided on the front panel. Due to its weight, it
also requires to be installed on shelves or other weight
support structure.
Stacking units is allowed for a maximum of three
units, due to the heat being generated while operating
under full load. To assist the air flow and cooling of the
amplifiers, the ventilation space of at least 1U is required
before next unit (either another 350-d or any other Sonix
module) can be mounted above.
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
!
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
!
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
!
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
!
A
B
C
D
E
A – Rack frame – 19”
B – 1U ventilation panel
C – Unit xings
D – Shelf or other weight support structure.
Compulsory for bottom-most unit
E – Optional shelves for the middle and upper units
Figure 3. Stacking 350-d units.
Warning: Ensure that no ventilation points are
obstructed, and that the module is correctly
supported within the cabinet.
IEC 60417-6043 (2011=01)
Beware of sharp edges and corners!
Take care while handling.
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Sonix 350-d Technical Manual
3.4.2 Amp Bus
The Amp bus is connected to a Sonix 2Mx central
controller and other 350-d ampliers. A working
Amp Bus connection is required to enable the 350-d
functionality. Each CAT6A cable provides bidirectional
data and audio transmission between the 2Mx and 350-
d. In the event of either one of those cables becoming
disconnected or otherwise broken both data and audio
has a redundant path, ensuring the system will continue
to operate without any loss of functionality (a connection
fault is raised by the system).
ote:N It is recommended that within the PA/GA cabinet these cables do
not exceed 25m in length. Please consult Eaton if greater distances are
required.
For single amplier unit connection to the Sonix 2Mx module
is made with a cable from the 350-d’s top Amp Bus port (see
Figure 2) plugged into the top port of the 2Mx’s Amp Bus.
With a second cable from the 350-d’s Amp Bus bottom port
plugged into the bottom port of the 2Mx’s Amp Bus, closing
the loop.
A simple connection diagram is presented on an illustration
below:
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
Sonix 2Mx
COMPLIANT
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
Sonix 2Mx
COMPLIANT
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#1
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#2
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#n
Figure 4. Connecting single 350-d to 2Mx module. View of rear of the units.
When connecting more than one Sonix 350-d unit, the top port
of the 2Mx is connected to the top port of the rst 350-d unit
while the bottom port of the 2Mx is connected to the bottom
port of the last 350-d unit in the chain. For all remaining 350-d
units in the chain, the bottom port of one unit is connected to
the top port of the next unit in a chain, as per diagram below:
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
Sonix 2Mx
COMPLIANT
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
Sonix 2Mx
COMPLIANT
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#1
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#2
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#n
Figure 5. Connecting multiple 350-d units to 2Mx module
ote:N The maximum number of units to be connected in a chain is 32,
if this is insufficient please contact your local Eaton representative to
discuss your requirements.
In the special case of PA/GA system being configured
as an N+1 System, additional equipment in the form of
N+1 Tap Board should be used. For details please refer
to 2Mx Product Manual.
11 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
3.4.3 EOL-8 Bus
The EOL-8 Bus ports provide the 100 V Line output
connection to the loudspeaker loops, isolated via a
line transformer. The Sonix Eol 8 unit serves as an
interface between 350-d and field loudspeaker wiring.
100 V output signal is distributed onto both top and
bottom Eol 8 ports. As a safety feature, these cables
also incorporate a sense wire, used to monitor valid
connectivity. In the event of either of the cables
becoming disconnected the signal transmission over
both ports is aborted to prevent electric shock. The
process is automatic and reconnecting the cable will
resume the signal transmission, without the need for
user interaction.
ote:N It is recommended that within the PA/GA cabinet,the Eol-8
CAT6A cables do not exceed 15 m in length. Please consult Eaton if
further distances are required. They should also be, where possible,
routed within the PA/GA system in a separate way to avoid contact
with signal or audio cables to reduce the likelihood of interference.
Warning: The CAT6A cables carry 100 V audio
power line; Electrical Shock Risk warning labels
must to be tted on both ends.
Each individual amplifier connects to one set of ports
on the Eol 8 unit (no specific cable connection ordering
required), up to 8 amplifiers per Eol 8 unit. If more than
8 amplifiers are required within the PA/GA system,
additional Eol 8 units are required.
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#9
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#8
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#3
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#2
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#1
Amp 1
Amp 2
Amp 3
Amp 4
Amp 5
Amp 6
Amp 7
Amp 8
Amp 1
Amp 2
Sonix Eol-8 #2
Sonix Eol-8 #1
...
Figure 6.Typical connection between 350-d and Eol 8 units.
For detailed information about connecting Sonix Eol 8
units please refer to the Sonix Eol 8 Technical Manual.
12 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
3.4.4 Hot Standby Bus and Hot Standby amplier
The Hot Standby ports provide a backup 100 V Line that
will be used in the case of an amplier failure. It allows
Hot Standby ampliers to drive the speaker load of any
connected faulty 350-d unit.
The Hot Standby bus connections are only between the
350-d units. Units are daisy-chained similarly to the Amp
Bus. All connections are top port to bottom port, as per
diagram below:
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#3 Hot Stand-by
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#2
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#1
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#6 Hot Stand-by
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#5
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#4
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
Figure 7. Hot Standby bus connections.
Warning: Hot Standby cables carry 100 V audio
power line; Electrical Shock Risk warning labels
need to be tted on both ends.
Any unit in a chain can be congured to be the Hot
Standby amplier (see 5.5). The recommended location
for placing the hot standby amplier is either above or
below the bank of associated ampliers.
The Hot Standby amplier is not connected to the Eol-8
unit, its top and bottom EOL-8 ports must be linked
together instead, as per Figure 7 above. This connection
is mandatory to enable 100 V output onto the Hot
Standby bus and maintain the Healthy status of the
system and is referred to as EOL loopback.
While there is no technical limit on how many ampliers
a single Hot Standby amplier should support, practical
considerations should be taken into account. Eaton
suggests that a minimum of 1 and maximum of 8
ampliers is a sensible starting point for a system.
ote:N There can be more than one Hot Standby amplifier, each with its
own chain of amplifiers connected in a Hot Standby loop.
Warning: Only congure one 350-d amplier as
a Hot Standby per Hot Standby Bus loop.
13 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#3 Hot Stand-by
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#2
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#1
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#6 Hot Stand-by
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#5
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
CO
MPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
#4
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
To Eol-8
Figure 8. Multiple Hot Standby loops.
3.4.5 350-d power source
Each individual 350-d unit can be powered from either or
both of two power sources:
1. ac power (110 V or 230 V),
2 48 V dc power.
Either can be used individually as a power source or
when both inputs are present, the current will be shared
between both ac and dc power.
Redundant ac power supplies are not handled by the
350-d unit itself, however the Sonix Pm10 unit can
be used which will automatically monitor and switch
between two independent ac power sources. The Pm10
unit provides the facility of connecting two incoming
ac power inputs and instantly and reliably switches
between them – it is also the recommended power
supply unit for all Sonix PA/GA systems. Please refer to
the Sonix Pm10 Technical Manual for details.
Warning: Do not ‘Hot plug’ the dc power
connections, they have no priority on connection
and a lack of 0V return can cause damage to the
unit.
3.4.5.1 AC Input
The Sonix 350-d unit’s ac input should be supplied
from 110 or 230 V ac at 50 to 60 Hz. This is delivered
via a standard IEC 60320/C13 connector. The minimum
required wire size is 0.75 mm2for each conductor in the
3-core power cable.
Figure 9. AC power input
Warning: Power cable must include an
adequately sized Earth conductor, connected to
protective earth.
ote:N As these cables are power feeds, they should be, where pos-
sible, routed within the PA/GA system in a separate way to avoid
contact with dc power or audio cables and reduce the possibility of
interference.
3.4.5.2 48 V dc (battery) input
While the ac input is the preferred power input method,
the 350-d has an alternative, 48 V dc power input
available. This will typically be connected to an externally
regulated (± 0.5%) dc power supply capable of providing
at minimum 8 A.
Figure 10. 48 V dc (battery) power supply.
Warning: The dc input requires a regulated
supply to 48 V ±0.5% due to output regulation
being directly related to dc input.
ote:N These cables are power feeds, they should be, where possible,
routed within the PA/GA system in a separate way to avoid contact
with ac power or audio cables and reduce the possibility of interfer-
ence.
Maximum supported wires are:
• Solid: 1.5 mm2
• Stranded: 0.5 mm2including sleeved ferrule
• Stranded: 1.5 mm2including non-sleeved ferrule
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
DC PSU
DC Battery
POWER SUPPLY
AC
Fuse
Local Tickton...
Sense Test
Local Reset
Line Cal
1
2
3
4
5
7
6
Sonix 350-d
TM
R
!
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
AC Input
85-265 vac 50-60Hz
1
2
3
4
5
6
7
8
9
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
0 V+48 V
Sonix 2Mx
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
350-d
COMPLIANT
AC Input
85-265 vac 50-60Hz
110 or 230 V ac
50 - 60 Hz
N/C
com
N/C
com
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
DC PSU
DC Battery
POWER SUPPLY
AC
Fuse
Local Tickton...
Sense Test
Local Reset
Line Cal
1
2
3
4
5
7
6
Sonix 350-d
TM
R
!
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
AC Input
85-265 vac 50-60Hz
1
2
3
4
5
6
7
8
9
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
0 V+48 V
Sonix 2Mx
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
350-d
COMPLIANT
AC Input
85-265 vac 50-60Hz
110 or 230 V ac
50 - 60 Hz
N/C
com
N/C
com
14 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
3.4.6 Fault outputs
Both PSU Fault and Amp Fault outputs are a volt-free
contact output. The contact is closed when the unit is
healthy and open when there is a fault or power to the
unit is lost.
Some of the faults monitored can be disabled in
conguration, see the SAS Product Manual for details.
Both fault outputs will hold their output for
approximately 10 seconds before clearing after any fault
has cleared, this is to allow any transient faults to be
registered by any external monitoring.
ote:N There is no configuration option to change the sense for either
output.
Figure 11. Fault outputs.
Maximum cable section supported are:
• Solid: 1.5 mm2
• Stranded: 0.5 mm2including sleeved ferrule
• Stranded: 1.5 mm2including non-sleeved ferrule
3.4.6.1 PSU Fault
PSU will activate for any of the following faults:
• AC Supply missing
• AC PSU loss of regulation
• DC input supply missing
• Internal voltage rails out of specification
3.4.6.2 Amp Fault
Amp will activate for any of the following faults:
• AC Supply missing
• AC PSU loss of regulation
• DC input supply missing
• Internal voltage rails out of specification
• Fan failure
• Communications missing
• Amplifier output fault
• Over temperature event
• Earth fault
• Sense test failure
• Amplifier overload event
3.4.7 Earth stud
Each unit is equipped with an M5 earth stud at the back
as a protection mechanism for the unit.
Each individual 350-d unit must be connected directly to
the Protective Earth with at least 1 mm2wire, although
2.5 mm2wire is recommended.
Figure 12. Recommended earth connection for the unit.
Warning: Unit must be connected to protective
earth observing minimum cable requirements.
Power
Amp
Earth
Line
Fan
Overload /
Shutdown
Temp
hsb
Audio Output
STATUS
DC PSU
DC Battery
POWER SUPPLY
AC
Fuse
Local Tickton...
Sense Test
Local Reset
Line Cal
1
2
3
4
5
7
6
Sonix 350-d
TM
R
!
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
AC Input
85-265 vac 50-60Hz
1
2
3
4
5
6
7
8
9
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
0 V+48 V
Sonix 2Mx
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Hmi Bus
Amp Bus
Hmi Bus
I/O Bus
350-d
COMPLIANT
AC Input
85-265 vac 50-60Hz
110 or 230 V ac
50 - 60 Hz
N/C
com
N/C
com
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
Sonix 350-d
Sonix 350-d
Sonix 350-d
Protective Earth
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
Sonix 350-d
Sonix 350-d
Sonix 350-d
Protective Earth
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
Sonix 350-d
Sonix 350-d
Sonix 350-d
Protective Earth
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
AC Input
85-265 vac 50-60Hz
Sonix 350-d
Sonix 350-d
Sonix 350-d
Protective Earth
15 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
3.4.8 Fusing
Sonix 350-d is equipped with two fuses on the internal
48 V dc rail to protect the unit:
• External 10 A time delay, anti-surge cartridge fuse
Size: 5 x 20 mm, user replaceable
• Internal 10 A thermal cut-off, rated at 152°C, not user
replaceable.
The external fuse failing will cause the Red fuse
indicator to illuminate, whereas failure of the thermal
fuse will cause the unit to fail to power up in any way.
ote:N The thermal fuse is not replaceable and if operated, the 350-d
unit needs to be replaced.
4 Setup and Conguration
Sonix 350-d unit does not have any external switches
nor jumper links to set. It contains a set of internal
jumper links LK1 and LK2 which are accessible upon
opening the unit – see section 4.1.
All unit conguration is done via the SAS application.
Correct conguration of settings is required to ensure
fault-free and correct operation of 350-d unit within the
PA/GA system.
Initial amplier conguration should be completed
during the system build as part of FAT/SAT procedure.
The Sonix Administration Software provides facilities to
export/import current conguration which can be used
to duplicate existing congurations onto replacement
units.
Replacement units come pre-congured with a general
setup used for quality and functionality testing and
should be recongured as appropriate on rst use.
Typical PA/GA systems have more than one amplier
present, it is not practical to pre-congure replacement
units before shipping as exact replacements.
Please refer to SAS Product Manual for details on how to
import, export or change the settings.
4.1 Audio Gain
LK1 and LK2 set the gain for the audio broadcasts and
are usually both tted during the initial quality test of the
unit. The gain values are presented in the table below:
LK1 LK2 Gain
In In 1 x 0 dB
Out In 1.4 x 3 dB
In Out 2 x 6 dB
Out Out 4.7 x 13 dB
Table 3. Audio gain values.
4.2 Unit ID / Associated Zone
As with most Sonix units, each 350-d present in the PA/
GA system needs to have a unique ID. This allows each
unit to be uniquely recognised and monitored by the
2Mx and SAS.
The identier for 350-d units consist of two parts:
Identifier Assignment Possible value range
Unit ID Sets the zone that the unit will respond
to 1 – 30 & 31*
Sub-Zone Sets the secondary ID for identifying
multiple amplifiers in the same zone 1 – 15
Table 4. 350-d identier.
ote:N *An amplifier configured with a zone number of 31 is called
All-Call amplifier and has different zone responses. Refer to 5.4.1 for
detailed operation of the All Call amplifier.
As the table shows, the Sonix PA/GA system can cover
up to 30 separate zones. For details on zoned operation
see Audio broadcast.
16 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
5 Unit operation
Sonix 350-d operates on the Amplier bus as part of the
Sonix PA/GA system. The Sonix 2Mx central controller
sends data packets and audio to control the ampliers’
mode and output. The data communication has three
main functions:
• Provide the meta-data associated with the provided
audio, for example zoning,
• To define the current operating mode and be able to
appropriately switch between them,
• Allow the amplifier to reply to the 2Mx with its
current operational status and any faults.
The two modes of 100V line output operation are:
• MosFET – in this mode the unit uses a full H-Bridge
to generate, via a line transformer, square-wave alarm
tones; lower fidelity but high power.
• Linear – In this mode the unit uses 3 linear audio
power amplifiers in parallel, driving the same line
transformer, to generate speech output, attenuated
alarms, sense test and tick-tone; high fidelity, low
power use.
It is possible to limit the 350-d to only work in one
of those modes using conguration. For details on
changing the conguration options please refer to the
SAS Product Manual.
5.1 Front panel unit status indicators
Sonix 350-d unit reports its status via the front panel
LEDs (see Figure 1), which are – except for Power and
hsb (Hot Standby) LEDs – grouped in pairs, and fault
output contacts on the rear (see Figure 2).
LEDs can indicate up to four states:
Green Red Status
On Off Healthy
Off On Fault
On Slow flashing Healthy but with historic (now cleared) fault
Off Fast flashing Connection issues
ote:N Not all states are relevant for each pair of LEDs and some indi-
vidual LEDs may flash for specific functions (see details below).
5.1.1 Power
This is a simple +48 V dc power indicator:
Green Status
On DC Power present and amplifier is operating
Off DC Power is missing or faulty
5.1.2 Amp
Indicates the status of amplier:
Green Red Status
On Off Healthy
Off On
Amplifier output fault detected:
•Failed internal audio test,
•Failed -5 V rail check.
On Slow flashing Healthy but with historic (now cleared) fault
Off Fast flashing Connection lost – no control data seen
5.1.3 Earth
Indicates earth fault status:
Green Red Status
On Off No earth fault
Off On Earth fault detected: a speaker loop cable
short to earth
On Slow flashing Earth fault had been detected but is now
cleared
5.1.4 Line
Indicates the status of eld 100 V Line cabling:
Green Red Status
On Off No line faults detected
Off On Failed Sense Test
On Slow flashing Line fault had been detected but is now
cleared
Off Fast flashing EOL8 cable issue or HSB Bus cable issue (for
hot standby amps)
5.1.5 Fan
Indicates the status of the fans:
Green Red Status
On Off Fans are running normally
Off On Fan Fault – fans are not running
On Slow flashing Fan fault had been detected but is now
cleared
5.1.6 Overload/Shutdown
Indicates status of amplier operation:
17 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
Green Red Status
On Off Amplifier is operating normally
Off On
Shutdown condition – amplifier temporarily
inactive for MosFET protection, when the
MosFET drive is overloaded
On Slow flashing Amplifier has been in shutdown mode but is now
operating normally
ote:N When in Shutdown mode, every ~10 seconds the amplifier will
try to return to normal operation and will carry on if fault condition is no
longer present.
5.1.7 Temperature
Indicates the temperature inside the amplier:
Green Red Status
On Off Internal temperature below the limit set in the
configuration
Off On
Temperature Fault condition – internal
temperature exceeded the limit set in the
configuration
On Slow flashing Temperature fault had been detected but is now
clear
There are two Temperature Set Point settings in the
350-d conguration:
• Temperature Set Point 1 - when internal temperature
exceeds this value, fans on the unit will speed up to
their maximum capacity,
• Temperature Set Point 2 – exceeding this value
triggers Temp Fault.
See the SAS Product Manual for details.
ote:N Those values refer to temperature inside the 350-d unit and not
the ambient temperature. All values are in °C.
5.1.8 Hot Standby
Indicates 350-d’s Hot Standby status:
Green Status
On Amplifier configured as a Hot Standby
Slow flashing Unit in fault, amplifier replaced by Hot Standby amplifier
5.1.9 Audio Output Level
Indicates the output audio level:
Green Status
Green Audio level low
Orange Audio level in nominal range
Red Audio level approaching maximum level
5.1.10 AC Power status
Indicates status of the ac power supply:
Green Red Status
On Off AC power present
Off On AC power missing – amplifier in fault
On Slow flashing AC power was missing but is now restored
ote:N This indication will only work if the unit is supplied from both ac
and battery power sources. If battery backup supply is not connected
the unit will shut down completely.
5.1.11 DC PSU status
Indicates status of the internal 48 V dc supply:
Green Red Status
On Off Internal 48 V dc present
Off On Internal 48 V dc out of specification or not
present
On Slow flashing Internal 48 V dc is now restored
Warning: AC power may still be present!
Care should be taken when fault-nding or
disconnecting the unit!
5.1.12 Fuse status
ote:N Indicates external fuse status:
Green Red Status
On Off Fuse good
Off On Fuse blown
ote:N With this fault there are no other LEDs visible on the unit.
Warning: AC power may still be present!
Care should be taken when fault-nding or
disconnecting the unit!
5.2 Rear panel fault outputs
See section 3.4.6 for details of operation.
5.3 Front button operation
Front panel button has several functions and each button
press will result in highlighting them in order from top to
bottom. Activation of the selected (highlighted) function
is automatic after a few seconds of no button activity. If
button is pressed while the last function is highlighted,
selection is cleared, and no function will be activated.
Figure 13 below illustrates this:
18 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
5.3.1 Local Ticktone
Local Ticktone is an audible, amplier generated, pulsed
tone that can be played over all connected loudspeakers
and is used for testing and commissioning the speaker
loops. The audio is broadcast over the out port only, so
that loop diagnostics can be performed. The diagram
below illustrates this:
Idle
Select...
Local Ticktone
Sense Test
Local Preset
Line Cal
Select...
Local Ticktone
Sense Test
Local Preset
Line Cal
Select...
Local Ticktone
Sense Test
Local Preset
Line Cal
Select...
Local Ticktone
Sense Test
Local Preset
Line Cal
Local Ticktone
Sense Test
Local Preset
Line Cal
Local Ticktone
Sense Test
Local Preset
Line Cal
5
4
3
2
1
Figure 13. Front button operation
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
X
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
In a standard broadcast, audio is transmitted through
both out and return paths for redundancy. Ticktone only
broadcasts on the Out path, this allows the technician
to narrow-down a possible 100 V line breakage by
following the loudspeaker loop and checking for audio
on each individual speaker.
19 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com

Sonix 350-d Technical Manual
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
X
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
Figure 14.Ticktone travel over faulty loudspeaker loop.
The Ticktone is a nominally 750 Hz pulse that lasts for
200 milliseconds and repeats approximately every 3
seconds. It is played with a reduced volume of 20 V
peak-peak (± 1V).
Ticktone is always the lowest priority event and will
be overridden by every other system activity. When
overridden by Routine Speech or Important Message,
it will auto-resume when the speech ends. It will not,
however, be restored after an alarm.
If the Ticktone is not interrupted by system, it will carry
on for the duration set in the conguration (see SAS
Product Manual for details).
ote:N Locally initiated Ticktone will only play over the loudspeakers
connected to that specific amplifier. Please refer to Global Ticktone
functionality inside the 2Mx Technical Manual for Ticktone played over
all zones.
5.3.2 Sense Test
Sense Test is an integrity test for the 100 V loudspeaker
line. It is an inaudible, amplier generated 21 kHz pulse sent
once over the connected speaker loops to check the wire
connection to all loudspeakers. The signal is sent through the
out path only of the amplier and through the Eol 8 unit to the
loudspeaker loop. It is then expected to come back on the
return path and into the 350-d, as per diagram below:
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
21 kHz
Line
STATUS
X
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
Hot Standby
Amp Bus
EOL-8 Bus
Fuse
Danger - Hazardous Voltages Present!
COMPLIANT
Amp
Fault
O/P
N/C
com
PSU
Fault
O/P
N/C
com
48 V
DC
I/P
+ -
Sonix 350-d
Out
Amp 1
Return
Amp 2
Sonix Eol-8 #1
Loudspeaker Loop
#1
#2
#3
750 Hz
Local Ticktone
Sense Test
Local Preset
Line Cal
#4
Figure 15. Sense Test signal with the loudspeaker loop.
20 SONIX 350-D TECHNICAL MANUAL TM367 / A May 2022 www.eaton.com