Digital Acoustics IP7-SS20 User manual

IP7™-SS20
IP Paging Amplifier
Reference Manual

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Table of Contents
Overview ........................................................................................1
Specifications .................................................................................2
IP7-SS20 Layout.............................................................................3
LED Indicators ................................................................................6
LEDs .............................................................................................. 6
LED Status Table ............................................................................. 6
LAN Connector LEDs......................................................................... 6
Connecting Power...........................................................................7
External Power ................................................................................ 7
USB Power...................................................................................... 7
Connecting a Speaker / Transformer..............................................7
SPKR 8Ω+ and SPKR 8Ω- .................................................................. 7
Speaker Configurations..................................................................... 7
25/70V Speaker(s) with optional 25/70V transformer............................ 7
8 Ohm Speaker(s) ........................................................................... 9
Connecting Line Out......................................................................10
Connecting an I2C Bus..................................................................10
Mounting Instructions ..................................................................10
Din Rail Mounting............................................................................10
Surface Mounting............................................................................10
Setting Volume Levels ..................................................................11
Software Configuration.................................................................11
IP Address .....................................................................................11
Options .........................................................................................11
Environmental ..............................................................................12
Troubleshooting............................................................................13
Reset to Factory Defaults .................................................................13
Connecting 1/8” (3.5mm) Audio Plug to the Pluggable connectors..........13
Reducing electrical noise in audio ......................................................13
Viewing tech support info via the USB port .........................................13
Low Level Flashing Utility .................................................................14
Contacting Technical Support .......................................................14
Email support:................................................................................14
Telephone Support:.........................................................................14
Regulatory Notices .......................................................................15
Index............................................................................................16
i

Overview
The Digital Acoustics IP7-SS20 is an IP (Internet Protocol) amplifier
that provide up to 20 watts of audio output. The SS20 is capable of
driving one or more speakers attached to a 25/70V audio distribution
line or an 8 ohm speaker.
Standard features include:
Drive one or more speakers for paging
applications
High quality audio up to 20 watts
Highly scalable and seamless expansion
DIN rail or surface mount
Fixed or DHCP compliant IP assignment
Auto sensing power from 24-32 VAC/VDC
Field upgradeable OS using internal Flash
memory
The IP7-SS20 must be configured using the TalkMaster software
before being used. Please consult the configuration section of the
software manual for details.
1

Specifications
Items Specification
Hardware Protocols TCP, UDP, RTP, ARP, ICMP, IGMP Multicast
Network Interface 10/100 Ethernet (Auto detection, Auto MDIX)
Command protocols Proprietary
Audio Rate 64kbs
Audio Resolution G.711 (8-bit PCM and 16-bit uLaw)
Audio Sample Rate 8 kHz (Voice band)
Audio Frequency 4000 Hz
Internal Amplifier 20 watts @ 8 Ohms
Humidity 10~90%
Power External Power 24-32 VAC/VDC @ 50 watts
nominal
Size 3.85. x 3.59 x 1.37 in
98 mm x 91mm x 35mm
2

IP7-SS20 Layout
1
2
3
4
5
6
7
J1
J2
3

Connections and Controls
Refer to the preceding pictures.
Connector Connector / Control Notes
1 + Button Volume up button
2 - Button Volume down button
3 USB-B Provides for low level firmware flashing
as well as viewing technical support
information. Will also power the unit for
diagnostic purposes.
4 Ext I/O I2C expansion bus interface that can be
used for custom applications. Requires
custom firmware from Digital Acoustics
5 Ethernet 10/100 10/100 Ethernet network interface.
Supports auto negotiation and auto-MDIX
6 Aux Power 2.1mm power connector with center tip
positive. 24-32 VAC/VDC
Warning: Connecting power to both the
2.1mm Power jack and the J1-1 and J1-2
power connectors at the same time will
damage the unit
7 DIN Rail Mounting Clip Allows unit to be snapped on to standard
35mm DIN Rail stock
4

There are two sets of pluggable DIN connectors (3.81mm centers) on
the SS20:
SS20 J1 Connector
SS20 J2 Connector
Connector Signal Notes
J1-1
Power +
J1-2 Power -
24 -32 VAC/VDC.
Warning: Connecting power to both the 2.1mm power
jack and the J1-1 and J1-2 power connectors at the
same time will damage the unit
Connector Signal Notes
J2-1 nc No Connection
J2-2 nc No Connection
J2-3 Line Out -10db with a 10k termination. Suitable for driving
headphones. Reference to J2-4
J2-4 GND System Ground
J2-5 nc No Connection
J2-6 SPKR 8Ω+
J2-7 SPKR 8Ω-
Floated differential output. Able to drive an 8 Ohm load
@ 20 watts or a 600 Ohm load
5

LED Indicators
LEDs
There are four LEDs present on the curved bezel on the front of the
product.
The blue LED indicates that the IP7-SS20 has powered up.
The three red LEDs indicate status of the unit.
LED Description
Ready Indicates whether the unit has connected to a Server
Link Indicates whether the unit has a valid network Connection
Active Indicates when audio is being received
LED Status Table
Description Ready Link Activity
Normal operational mode. Unit can
communicate with its Server
On On Off
Playing Audio On On Flashing
Playing Broadcast Audio Fast Flash On Flashing
Attempting to connect to make a
connection or unit has not been
configured
Flashing On
LAN connection is inactive. The RJ45 may
be unplugged
Flashing Off
Unit has been detected by the
Talkmaster Configuration Tool
Fast Flash On
LAN Connector LEDs
On the Ethernet 10/100 RJ-45 connector:
The Green LED tracks to the Ready LED
The Yellow LED tracks to the Link LED
Connecting to an Ethernet Network
The Ethernet 10/100 connector allows the unit to be attached to a
10/100 network.
6

Plug a Cat5 cable into the RJ-45 connector labeled Ethernet
10/100 and connect the other end to a 10/100 switch.
The Ethernet 10/100 connector supports auto “MDIX” and can
be plugged directly into a PC for diagnostic purposes.
Connecting Power
The IP7-SS20 auto senses the power source and voltage.
External Power
The 2.1mm Power Jack (center tip positive) accepts 24-32
VAC/VDC
The J1-1(+) and J1-2(-) connector accepts 24-32 VAC/VDC
DO NOT supply power to both the 2.1mm Power Jack and the
J1-1 and J1-2
USB Power
The USB connector can be used to power up the unit for diagnostics or
low level firmware flashing. Plug a USB cable from a PC into the USB-B
connector. The unit will power up, but will not be able to be used for
audio operations.
Connecting a Speaker / Transformer
SPKR 8Ω+ and SPKR 8Ω-
The Speaker connectors are designed to drive an 8 Ohm load.
Connect J2-6 and J2-7 to the speaker, transformer or amplifier
(polarity independent)
If the IP7-SS20 is connected to an amplifier, set the volume
level on IP7-SS20 to 4 or less
Speaker Configurations
The IP7-SS20 is designed to drive speakers attached to a 25/70V
distribution line (requires optional 25/70V Transformer) or an 8 Ohm.
One or more speakers can be driven by a single IP7-SS20. If more
that one speaker is connected to an IP7-SS20, all speakers will sound
when audio is sent to that SS20.
25/70V Speaker(s) with optional 25/70V transformer
The SS20 can drive one or more 25/70V Speakers or Horns when
equipped with an optional 25/70V transformer. This is the
recommended installation method when driving multiple speakers.
7

Please note the following guidelines:
Each speaker must have its own 25/70V transformer
Do not mix Speakers tapped for 25V with a 70V distribution line
or speakers tapped for 70V with a 25V distribution line
All speakers must be wired in parallel.
Speakers should be installed within 3000 feet (900 meters) of
the SE8 using 14 gauge wire
The total wattage available from the SE8 must be reduced by
30% to account for transformer and line loss
The total wattage of the selected speaker taps cannot exceed the
wattage available from the IP7
Maintain the same wiring polarity between speakers
To use the optional transformer:
Mount the transformer next to the IP Amplifier
Connect the J2-6 (SPKR 8Ω+) and J2-7 (SPKR 8Ω-) from the IP
Amplifier to the 8 Ohm side of the transformer
Connect the 20 watt taps from the other side of the transformer
to the wires leading to the speaker(s)
Refer to the instructions included with the transformer for
additional information
8

8 Ohm Speaker(s)
The following configurations are supported for driving 8 Ohm speakers.
If you plan on driving more than one speaker, consider using 25/70V
Speaker(s) with optional 25/70V transformer as described in the
previous section.
A single 8 Ohm speaker
Two 8 Ohm speakers must be wired in series
Four 8 Ohm speakers must be wired in series-parallel
9

Please note the following guidelines:
Speakers should be installed within 100 feet (30 meters) of the
SS20 using 18 gauge wire
The total amount of wire used in the wiring run should not
exceed 200 feet (60 meters)
The total watts available from the SS20 are distributed equally
among the speakers.
Connecting Line Out
The Line Out connector is designed to drive a 600 Ohm unbalanced
load at -10db. This is capable of driving headphones or a multimedia
speaker.
Connect J2-3 to the + side of the output source
Connect J2-4 to the - side of the output source
Cable length should not exceed 6ft (2 meters)
Use 22 awg shielded/stranded cable
Connecting an I2C Bus
The IP7-SS20 can support an optional I2C bus via the RJ-10 connecter.
Buttons, relays and LEDs can be added to the I2C bus, BUT REQUIRE
CUSTOM FIRMWARE AND SOFTWARE. Please contact Digital Acoustics
for additional information.
Mounting Instructions
The IP7-SS20 can be installed on a DIN Rail or surface mounted.
Din Rail Mounting
To DIN rail mount:
Cut a piece of 35mm DIN rail (not supplied) to the desired length
and secure it to the wall
Place the IP7-SS20 onto the DIN rail by tilting the top of the unit
(J1, J2, J3 connectors facing up with Volume buttons and USB-B
connector facing forward) back towards the DIN Rail until the
IP7-SS20s DIN clip catches the top of the rail
Press in at the bottom of the IP7-SS20 to snap it in place
Surface Mounting
To surface mount:
10

Attach the detachable surface mount plate to the back of the
unit using the provided screws. The two mounting holes of the
surface mount plate should be above the
J1, J2, and J3 connectors
Attach two (2) #8 pan head screws 2
inches (52 mm) apart and screw in to
within ¼”
Place the mounting holes of the IP7-SS20
over the #8 screws
Attach one (1) #8 screw to the remaining hole at the bottom of
the mounting plate
Setting Volume Levels
The IP7-SS20 supports seven volume levels for an attached speaker.
Press the “+” or “-“ Button one time to increase or decrease the
speaker volume
If no audio is playing, a high frequency beep is heard when the
volume “+” is pressed and a low frequency beep is heard when
the volume “-” is pressed
Pressing the “-” or “+“ button seven times sets the unit at its
lowest or highest setting.
Refer to the software manuals for setting the volume via
software.
Software Configuration
IP Address
Refer to the software manuals for instructions on setting the IP
address information for the IP7-SS20
Options
Refer to the software manuals for instructions on setting the “Remote
Listen Disable” option in the IP7-SS20:
11

Physical Dimensions
The IP7-SS20 dimensions are as follows:
Environmental
The IP7-SS20 is designed to operate indoors or in a weather proof box
that has a NEMA4 or IP66 rating.
12

Troubleshooting
Always refer the LED Indicator table when troubleshooting the IP7-
SS20.
Reset to Factory Defaults
The IP Address information and all options can be reset to factory
defaults by the following procedure:
Unplug the Power
Press and hold the “Vol +” and “Vol -“ buttons
Power the unit
Wait till the unit plays a 3 tone beep (about 5 seconds)
Release the “Vol +” and “Vol -“ buttons
Refer to the software manuals for instructions on setting the IP
address information
Connecting 1/8” (3.5mm) Audio Plug to the Pluggable connectors
To connect Line Out to the pluggable connectors via a 1/8” audio
connector, the audio plug should be wired as follows:
The Tip should be wired to positive
The Sleeve should be wired to minus or ground
On stereo plugs, the Ring can be connected to minus or ground
or left unconnected
Reducing electrical noise in audio
Improper wiring can cause noisy audio when transmitting microphone
audio from the SS20. To minimize the possibility of this:
Locate the unit at least one meter away from transformers,
stepper motors or other noise producing equipment
Use shielded twisted multi-conductor cable for audio and follow
the grounding recommendations
Do not run audio cable in the same conduit with AC power
Attached J3-7 to an earth ground
Viewing tech support info via the USB port
If requested by Digital Acoustics Support, a USB cable can be attached
to the IP7-SS20 to capture additional information.
Attach a USB cable to the USB-B connector on the unit.
13

Attach the other end of the cable to a PC running Windows®.
If an “Install Hardware” prompt is displayed, insert the TM CD
that came with the product and install the USB Virtual Com port.
Open the Windows Device Manager to determine the virtual
Serial port that has been assigned
Open the Windows® Hyperterm program (or similar terminal
emulation program) and set the properties to select the new
Serial port with settings of 115kbs, 8,N,1, no flow control and
ANSI Terminal
Press the Enter key
Provide the requested info to Digital Acoustics Tech support
Low Level Flashing Utility
If a power is removed from the unit while the firmware is being
updated from the network, the unit may require a low level flash.
Install the Low Level Flashing Utility from Technical Support
Remove the four screws (two on the front and two on the back)
Open the case by pulling up on the side opposite the Volume
buttons till the top pops off
Connect the USB cable (this will power the unit up)
Position the unit with the Vol “+” and Vol “-“ buttons facing you
Bend a paper clip or piece of wire and insert into the two holes
to the right of the Vol “+” and Vol “-“ buttons
Power cycle the unit by removing and reinserting the USB cable
Run the Low Level Flashing Utility and specify the file name of
the firmware
Repower the unit
Contacting Technical Support
Information online at www.digitalacoustics.com
Email support:
[email protected]
Telephone Support:
[phone] Mon-Fri 8-6 (Central Time Zone)
14

Regulatory Notices
Federal Communication Commission Class A Notice
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his
own expense.
In compliance with FCC regulations, the following information is provided on the
device or devices covered in this document.
Product Name: IP7 Series
Model number: SS20,Sx8,STx
Company name: Digital Acoustics LLC
37 Sherwood Terrace
Lake Bluff, IL 60044
847-604-9246
IC Notice (Canada Only)
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
NOTE: Industry Canada regulations provide that changes or modifications not
expressly approved by Digital Acoustics, LLC could void your authority to operate
this equipment
CE Notice
Marking by the symbol indicates compliance of this equipment to the EMC
(Electromagnetic Compatibility) directive of the European Community. Such marking
is indicative that this equipment meets or exceeds at least an EN 55022:2006
Class A device
VCCI Compliance
Class A
AS/NZS CISPR22:2006 Compliance
Class A
CNS 13438 Compliance
Class A
15

16
Index
- Button.......................... 4, 11
+ Button......................... 4, 11
Aux Power ........................... 4
DIN rail mount.....................10
DIN Rail Mounting Clip........... 4
Ethernet 10/100 ................... 4
Ext I/O ................................ 4
External Power ..................... 7
IP Configuration...................11
LED..................................... 6
LED Status........................... 6
Line Out .............................. 5
Line Out connector ............. 10
Options .............................. 11
Power ..................................5
Power - ................................5
SPKR 8Ω- .............................5
SPKR 8Ω+ ............................5
surface mount..................... 11
USB Power ...........................7
USB-B..................................4
Volume .............................. 11

www.digitalacoustics.com
Digital Acoustics' product designs are packaged by leading
manufacturers around the world. Contact factory for
technical specification before product design and/or use.
Design and specification are subject to change without
notice.
Digital Acoustics®, IP7™, ii3™ and TalkMaster™ are
trademarks of Digital Acoustics, LLC. I2C is a registered
trademark of NXP Semiconductors, Inc. All other marks
used are properties of their respective owners.
Copyright 2007-2010, All Rights Reserved
IP7-SS20 Reference Manual.docu v101217-2