Toa NX-300 User guide

INSTALLATION SETUP MANUAL
NETWORK AUDIO ADAPTER NX-300
Thank you for purchasing TOA’s Network Audio Adapter.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

2
TABLE OF CONTENTS
Chapter 1 SYSTEM SUMMARY
1. GENERAL DESCRIPTION ....................................................................... 1-2
2. FEATURES ......................................................................................................... 1-2
3. NOMENCLATURE AND FUNCTIONS .............................................. 1-3
Front .......................................................................................................................... 1-3
Rear .......................................................................................................................... 1-4
4. SETTING TASK FLOWS ........................................................................... 1-5
Chapter 2 INSTALLATION AND CONNECTION
1. CONNECTIONS ............................................................................................... 2-2
1.1. Power Source Connections ................................................................................ 2-2
1.2. Terminal Connections ....................................................................................... 2-3
1.3. Removable Terminal Plug Connection ............................................................... 2-7
2. INSTALLATION .............................................................................................. 2-8
2.1. Rack Mounting .................................................................................................. 2-8
2.2. Wall Mounting ................................................................................................... 2-9
2.3. Desk-Top Installation ........................................................................................ 2-10
3. BEFORE SETUP ........................................................................................... 2-11
3.1. MAC Addresses and Installation Locations ...................................................... 2-11
3.2. Input Level Adjustment .................................................................................... 2-11
Chapter 3 SYSTEM SETTINGS
(NX-300 SETTING SOFTWARE)
1. GENERAL DESCRIPTION ...................................................................... 3-2
1.1. NX-300 Finder and NX-300 Setting Software ................................................... 3-2
1.2. About Network Settings .................................................................................... 3-2
1.3. Backing-Up Setting Files .................................................................................. 3-2
1.4. Cautions Concerning Setting Updates .............................................................. 3-2
2. SOFTWARE INSTALLATION ................................................................ 3-3
2.1. System Conditions ............................................................................................ 3-3
2.2. Downloading the Software ................................................................................ 3-3
2.3. Required Component Installation ..................................................................... 3-3
2.4. NX-300 Setting Software Installation ................................................................ 3-4
2.5. When NX-300 Software Uninstallation ............................................................. 3-5
2.6. Folder Configuration ......................................................................................... 3-6

3
3. SOFTWARE CONFIGURATION AND SETTING ITEMS ...... 3-7
4. SETTING PROCEDURE ........................................................................... 3-8
5. STARTING THE NX-300 FINDER ...................................................... 3-10
5.1. How to Start the NX-300 Finder ....................................................................... 3-10
5.2. Menu ................................................................................................................ 3 -11
5.3. Button ............................................................................................................... 3-11
5.4. Detecting Units ................................................................................................. 3-12
5.5. Screen Description .......................................................................................... 3-13
5.6. Changing the Unit Setting Values Related to the Network .............................. 3-14
5.7. Saving the Unit Detection List Data .................................................................. 3-15
6. STARTING THE NX-300 SETTING SOFTWARE .................... 3-16
7. OPERATION FROM THE SYSTEM EDITING SCREEN ....... 3-16
7.1. Creating a New System .................................................................................... 3-17
7.2. Editing Registered Systems ............................................................................. 3-18
7.3. Deleting Registered Systems ........................................................................... 3-19
8. SETUP EDITING SCREEN ................................................................... 3-20
8.1. Screen Explanation ......................................................................................... 3-20
8.2. Menu ............................................................................................................... 3-22
9. SYSTEM CONFIGURATION SETTINGS ...................................... 3-23
9.1. Importing Unit Detection Results ..................................................................... 3-23
9.2. Adding Units to the Unit List ............................................................................ 3-24
9.3. Deleting Units from the Unit List ..................................................................... 3-25
10. GENERAL SYSTEM SETTINGS ..................................................... 3-26
10.1. Network Settings ........................................................................................... 3-28
10.2. External Server Settings (NX-300 only) ........................................................ 3-34
10.3. Broadcast Spec Settings .............................................................................. 3-35
11. PATTERN SETTINGS ............................................................................ 3-38
11.1. Pattern Setting Summary .............................................................................. 3-39
11.2. Broadcast Pattern Settings .......................................................................... 3-40
11.3. Contact Bridge Pattern Settings .................................................................... 3-46
11.4. Control Pattern Settings ................................................................................. 3-51
12. CONTROL INPUT SETTINGS .......................................................... 3-56
12.1. For the NX-300 Units ..................................................................................... 3-56
12.2. For the NX-100/100S Units ............................................................................ 3-58
13. CONTROL OUTPUT SETTINGS .................................................... 3-61
14. SERIAL BRIDGE SETTING (NX-100 ONLY) ........................... 3-63

4
15. AUDIO FILE SETTINGS ....................................................................... 3-65
15.1. Uploading Audio Files .................................................................................... 3-65
15.2. Deleting Audio Files ...................................................................................... 3-67
16. OPERATIONS ACCESSIBLE FROM THE SETUP EDITING
SCREEN MENU
........................................................................................... 3-68
16.1. Saving the Unit Setting Files ......................................................................... 3-68
16.2. Changing the System Name and Password ................................................. 3-68
16.3. Changing the System Password ................................................................... 3-69
16.4. Uploading Unit Setting Files ........................................................................... 3-70
16.5. Downloading Unit Setting Files ...................................................................... 3-71
16.6. Uploading PC Clock Settings ......................................................................... 3-72
16.7. Disabling Network Item Editing ...................................................................... 3-72
16.8. Accessing the TOA Product Data Download Site .......................................... 3-72
16.9. Confirming NX-300 Setting Software Version Number .................................. 3-72
17. SYSTEM SETTING EXAMPLES ...................................................... 3-73
17.1. System Application Examples ......................................................................... 3-73
17.2. Broadcasting Announcements Over Station Premises .................................. 3 -74
17.3. Broadcasting Departure Melodies Over the Station Premises ...................... 3-78
17.4. Broadcasting Departure Melodies Using the PC ........................................... 3-82
17. 5 . Using a Microphone to Make an Emergency Broadcast from the
Central Station .............................................................................................. 3-85
to Station C during a Departure Melody Broadcast ............................................... 3-85
17.6. Reducing the Nighttime Broadcasting Volume .............................................. 3-89
Chapter 4 SYSTEM AND MANAGEMENT BY BROWSER
1. OUTLINE OF SETTINGS USING BROWSER ............................. 4-2
2. DISPLAYING THE SETTING MENU SCREEN .......................... 4-3
3. MENU ITEMS ................................................................................................... 4-4
4. NETWORK SETTING ................................................................................. 4-5
5. AUDIO FILE MANAGEMENT ................................................................. 4-7
5.1. Adding Audio Files ............................................................................................ 4-8
5.2. Deleting Audio Files From the File List ............................................................ 4-10
5.3. Deleting All Audio Files .................................................................................... 4-10
6. LOG MANAGEMENT ................................................................................. 4 -11
6.1. Operation Log ................................................................................................... 4-12
6.2. Stream Log ...................................................................................................... 4-14
6.3. Save Logs ........................................................................................................ 4-16
6.4. Operating Status .............................................................................................. 4-17
7. SYSTEM MANAGEMENT ........................................................................ 4-19
7.1. System Names and Passwords Change .......................................................... 4-21
7.2. Setting File Upload .......................................................................................... 4-22

5
7.3. Downloading the Unit Setting Files .................................................................. 4-24
7.4. Setting All Settings to Default Status ............................................................... 4-25
7.5. Updating Firmware .......................................................................................... 4-26
7.6. Clock Setting ................................................................................................... 4-27
7.7. Reflecting Changed Settings (Unit Restart) ..................................................... 4-27
Chapter 5 SETTINGS NECESSARY WHEN USING
THE NX-300 OPERATION SOFTWARE
1. NX-300 OPERATION SOFTWARE SUMMARY ......................... 5-2
2. STARTUP AND INITIAL SCREEN ..................................................... 5-2
3. OPERATION SCREEN DESCRIPTION ........................................... 5-4
3.1. Button Screen .................................................................................................... 5-4
3.2. Unit List Screen ................................................................................................ 5-5
3.3. Status Screen .................................................................................................... 5-7
3.4. Detail Screen .................................................................................................... 5-8
4. OPERATION SCREEN MENU ............................................................. 5-10
5. SETTING PROCEDURES USING
THE NX-300 OPERATION SOFTWARE ........................................ 5 -11
6. BUTTON SETTINGS .................................................................................. 5-12
6.1. Creating Single Selection Buttons .................................................................... 5-12
6.2. Creating the Group Selection Button ............................................................... 5-15
6.3. Deleting Created Buttons ................................................................................. 5-18
7. PERFORMING VARIOUS OTHER SETTINGS ......................... 5-20
7.1. Setting the Administrator Password ................................................................ 5-20
7.2. Changing the Title for the NX-300 Operation Software ................................. 5-22
8. ERROR MESSAGES ................................................................................. 5-23
Chapter 6 APPENDIX
1. EXPLANATION ............................................................................................... 6-2
1.1. IP Network and Address .................................................................................... 6-2
1.2. Network Address Port Translation (NAPT) ...................................................... 6-3
1.3. IP Broadcast and Unit Scan .............................................................................. 6-3
1.4. Multicast and Simultaneous Multiple Broadcasts ............................................. 6-4
1.5. How the Contact Bridge Works ......................................................................... 6-5
1.6. Maximum Number of Broadcasting Destinations .............................................. 6-8
1.7. Priority Levels .................................................................................................... 6-9
1.8. Transmitting a Single Sound Source to Multiple Channels .............................. 6-10
1.9. About Operation Log Acquisition .................................................................... 6 -11
1.10. Disabling the Reset Switch ............................................................................. 6-12
1.11. Changing the Input Volume Control to the Output Volume Control ................ 6-13
2. INDICATOR STATUS AND TROUBLESHOOTING ................ 6-14

6
3. LEVEL DIAGRAM ........................................................................................ 6-16
3.1. Block Diagram .................................................................................................. 6-16
3.2. Level Diagram .................................................................................................. 6-16
3.3. About Setting Values and Audio Input Level Adjustments ............................... 6 -17
4. IF A FAILURE IS DETECTED ............................................................... 6-18
5. SPECIFICATIONS ....................................................................................... 6-20

Chapter 1
SYSTEM SUMMARY

Chapter 1 SYSTEM SUMMARY
1-2
2. FEATURES
• Permits use of not only dedicated lines, but also the Internet, which greatly reduces operating costs when
transmitting audio signals to remote locations.
• Under peak conditions with no network delay, audio signals can be transmitted with a minimal delay of
about 20 ms.
• Transmission of control data of control input and output terminals possible.
• Equipped with 2 audio inputs and 2 audio outputs, permitting audio le broadcasting.
• Simultaneous bi-directional transmission of audio signals possible.
• Broadcasts can be made of audio les stored in the built-in memory.
• Audio signals can be simultaneously transmitted to multiple locations (16 locations by unicast*1or 64
locations by multicast*2per channel).
• Enables audio signal transmission even over congested networks such as the Internet.
• Surveillance function keeps a constant watch on the audio inputs and outputs, and network and control
input (1 channel only), and sends an alarm through the indicators or control output when a malfunction or
failure is detected.
• The entire system can be remotely operated or managed from a single PC (personal computer) using the
software program.
• Operation log can be saved to an installed SD card (commercial product).
• Because audio transmissions can be started and nished via the unit's contact inputs, systems can be
congured even without the use of a PC.
• Designed to operate on either AC adapter (option) or DC power source.
*1UNICAST : A communications method used to transmit audio data to designated addresses in a
matched ratio of 1:1.
*2MULTICAST : A communications method used to simultaneously transmit a single audio data source to
multiple destinations.
1. GENERAL DESCRIPTION
TOA’s NX-300 Network Audio Adapter is specially developed to transmit high-quality audio signals over IP
networks such as LAN or Internet in real time.
[Audio Signal Flow Chart]
NX-300
LAN / WAN
CD or other music player
Microphone
Mixer
Amplifier Speaker
Audio signal (1)
Audio signal (2)
NX-300
CD or other music player
Microphone
Mixer
Amplifier Speaker
PC with NX-300
software installed
STATUSBUSY RUNERROR 2121 SD CARD RESET
NETWORK AUDIO ADAPTER NX-300
OUTPUTINPUT
LNK/ACT
VOLUME
1 2
STATUSBUSY RUNERROR 2121 SD CARD RESET
NETWORK AUDIO ADAPTER NX-300
OUTPUTINPUT
LNK/ACT
VOLUME
1 2

Chapter 1 SYSTEM SUMMARY
1-3
3. NOMENCLATURE AND FUNCTIONS
[Front]
STATUSBUSY RUNERROR 2121 SD CARD RESET
OUTPUTINPUT
LNK/ACT
VOLUME
1 2
00-05-F9-FF-80-81
NETWORK AUDIO ADAPTER NX-300
1. Input indicator (Green/Red)
This indicator lights green when signal received
at the audio input terminal (21) reaches a level
high enough to transmit it to a network after
adjustment with the input level control. When the
indicator lights red, this means that distortion has
been detected in the audio signal. Set the input
volume control (2) or switches 5 and 6 (audio input
pad setting switch) of DIP switch for equipment
settings (22) to appropriate settings.
2. Input volume control
When adjusting the level, remove the protective
cover by pulling it downward as shown in the
gure below. The level increases with clockwise
rotation and decreases with counterclockwise
rotation.
Adjust the input volume control so that the input
indicator (1) lights green, but not red.
For more information on level adjustments, see p.
2-11, "Input Level Adjustment."
Note
The protective cover cannot be detached from
the NX-300.
3. Output indicator (Green)
Lights when the level of the signal sent out from
the audio output terminal is sufcient.
4. LNK/ACT indicator (Green)
Lights when the unit is connected to a network.
Flashes while the unit is transmitting or receiving
data.
5. Busy indicator (Green)
Continuously ashes while reading and writing
data into a built-in memory or SD card.
Lights for one second and then extinguishes
when another broadcast with lower priority made
during a broadcast with higher priority is rejected.
6. Status indicator (Green)
Continuously lights during broadcasting.
7. Error indicator (Yellow)
Either ashes or lights when a failure or
communication error occurs.
8. Run indicator (Green)
Flashes when the NX-300 is operating normally,
and either continuously lights or extinguishes
when a malfunction is detected.
9. SD card insertion slot
Remove the protective cover by pulling it
downward as shown in the gure below, and fully
insert the SD card into the slot with the card’s
label facing upward.
Note
The protective cover cannot be detached from
the NX-300.
10. MAC address
The unit’s MAC address consists of 12 hyphenated
alphanumeric characters.
11. Reset button
Restarts the unit when pressed.
Protective cover
Downward
Protective cover
Downward

Chapter 1 SYSTEM SUMMARY
1-4
[Rear]
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
12. Signal GND terminal
Be sure this terminal is securely grounded.
Note: This terminal is not for protective ground.
13. DC power input terminal
A 24 V DC input.
14. AC adapter terminal
Connects to the optional AD-246 AC Adapter or
the equivalent.
As for the usable adapter, consult your TOA
dealer.
15. Network connection terminal
Connects to 10BASE-T or 100BASE-TX networks.
(RJ-45 Ethernet jack)
16. Control output terminal (9, 10)
Relay contact outputs (withstand voltage: 30 V
DC, control current: 0.5 A maximum).
17. Control output terminal (1 – 8)
An open collector output (withstand voltage: 30 V
DC, control current: 50 mA maximum).
18. Audio output terminal
0 dB*, under 600 Ω, balanced type.
Provide audio signals of line signal level.
H: Hot, C: Cold, E: Earth (shield)
19. Cord clamp
Pinches and securely holds the AC adapter cord
to prevent its plug from detaching.
20. Control input terminal
No-voltage make contact input (short-circuit
current: under 2 mA; open-circuit voltage: 24 V).
21. Audio input terminal
−20 dB* for line signal level, −60 dB* for microphone
signal level, 2 kΩ, balanced/unbalanced switchable.
Receive audio signals of microphone or line signal
level.
H: Hot, C: Cold, E: Earth (shield)
22. DIP switch for equipment settings
Used when performing audio input settings.
[Default DIP switch setting]
•Switch 1
Ground lift selection switch
(NORMAL/GND LIFT)
A ground loop can potentially be created when
the NX-300 is connected to other equipment,
resulting in a hum noise. Ground loops can be
cut off by setting this switch to GND LIFT (lower
position). Settings are common to both Audio
Inputs 1 and 2. This switch is factory-preset to
NORMAL (upper position).
•Switches 2 – 4
Not used.
These switches are factory-preset to OFF (lower
position). Always keep them to the OFF (lower
position).
•Switches 5, 6
Audio input pad setting switch (PAD)
Enables or disables the audio input pad (−16
dB). When the input level is large, set the PAD
to ON (upper position). These switches are
factory-preset to OFF (lower position). Switch
5 (PAD 1) corresponds to Audio Input 1 and
Switch 6 (PAD 2) corresponds to Audio Input 2.
•Switches 7, 8
Audio input level selection switch
(MIC/LINE)
Set these switches to MIC (upper position) when
a microphone is connected, and to LINE (lower
position) in other cases.
These switches are factory-preset to LINE
(lower position). Switch 7 (MIC 1) corresponds to
Audio Input 1 and Switch 8 (MIC 2) corresponds
to Audio Input 2.
* 0 dB = 1 V
ON
12345678
GND LIFT LINE
PAD
1212
MIC
NORMAL

Chapter 1 SYSTEM SUMMARY
1-5
(1) Unit Installation and Connection
See Chapter 2, "INSTALLATION AND CONNECTION."
(2) Software Installation
Install the NX-300 Setting Software, the NX-300 Finder, and the NX-300 Operation Software in the PC.
• The NX-300 Setting Software can perform settings for multiple NX-300 units connected to the same
network.
• The NX-300 Finder is used to detect NX-300 units on a network and change network settings.
• The NX-300 Operation Software enables the PC to remotely operate the NX-300 to make broadcasts.
Note
See p. 3-3, "SOFTWARE INSTALLATION," for the installation procedure.
(4) Operation-Related Settings
The NX-300 Operation Program is required to make broadcasts from the PC. The NX-300 Operation
Software performs settings using the setting data prepared in System Setting (3) above.
Note
See Chapter 5, "SETTINGS NECESSARY WHEN USING THE NX-300 OPERATION SOFTWARE,"
for the setting procedure.
(3) System Setting
To perform settings, use the NX-300 Setting Software and NX-300 Finder.
The entire system can be set and managed with the NX-300 Setting Software by automatically
detecting any NX-300 units connected to a local network using the NX-300 Finder.
Note
See Chapter 3, "SYSTEM SETTINGS (NX-300 SETTING SOFTWARE)," for the setting procedure.
4. SETTING TASK FLOWS

Chapter 2
INSTALLATION AND CONNECTION

Chapter 2 INSTALLATION AND CONNECTION
2-2
1. CONNECTIONS
1.1. Power Source Connections
1.1.1. When using a 24 V DC power source
Connect a 24 V DC power source to the unit’s DC power input terminal.
LAN
To 24 V DC power source
1.1.2. When using the AC adapter
Connect the AC adapter* to the unit’s AC adapter terminal. Pinch the cord with a clamp and securely x it.
* Use the optional AC adapter AD-246 or the equivalent. As for the usable adapter, consult your TOA dealer.
Notes
• Be sure the signal GND terminal is securely grounded.
• The DC power supply must have a capacity of over 400 mA.
• The range of input voltage to be fed to the DC power input
terminal should be between 21.6 V and 26.4 V DC. If the input
voltage is out of this range, the unit may malfunction or fail.
• See p. 2-7, "Removable Terminal Plug Connection," for
connector connection procedures.
AC ADAPTER
DC INPUT
Cord clamp
AC adapter AD-246
(option)
Note
Be sure the signal GND terminal is securely grounded.
Tip
If power is sent to both the AC adapter terminal and DC
power input terminal, power is supplied to the NX-300
from the terminal having the higher voltage.
For AC adapters, use an optional AD-246 Adapter or the
equivalent. The use of other adapters could result in a re or
other possible damage.
CAUTION

Chapter 2 INSTALLATION AND CONNECTION
2-3
1.2. Terminal Connections
1.2.1. Network connections
The NX-300 automatically distinguishes between 10BASE-T and 100BASE-TX networks, and establishes a
connection. For this connection, use a"straight” UTP Category 5 or greater LAN (Ethernet) cable tted with
an RJ-45 connector.
CONTROL OUTPUT
To Network
Tip
It is recommended that the unit be connected to network
equipmentcapableofperformingfull-duplexcommunications.
1.2.2. Connections to audio input and output terminals
See p. 2-7, "Removable Terminal Plug Connection," for audio input and output terminals connection
procedures.
When the connected unit has an unbalanced input, make the connections
as follows:
NX-300
Connected Unit H
E
Hot (H)
Cold (C)
Earth (E)
Shield Shield
· Audio output terminal connections
Connect the mixer, amplifier, etc. using 2-core
shielded cable.
· Audio input terminal connections
Connect the microphone or other sound
sources using 2-core shielded cable.
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
To microphone or
other sound sources
To mixer, amplifier, etc.

Chapter 2 INSTALLATION AND CONNECTION
2-4
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
NX-300
To microphone or
other sound sources
Note
Since the attenuation per 1-channel passage changes depending on the NX-300’s input settings, use care
when connecting multiple units.
• In the case of unbalanced input settings: 0 dB
• In the case of balanced input settings: −2 dB
[When transmitting audio from one sound source to multiple channels]
To use the same sound source between channels or NX-300 units through the NX-300’s audio input terminal,
perform connections as shown below using the bridge out Function*.
This type of connection is required in the following cases:
• Broadcasting to multiple destinations in excess of the maximum number of locations that can receive
broadcasts per channel.
• Using multiple broadcasting patterns for the same sound source.
* A function that always provides the same audio signal as the audio input from the audio output.
The connection method shown in the gure is an example. For more information on the bridge out function,
see p. 6-10, "Transmitting a Single Sound Source to Multiple Channels""

Chapter 2 INSTALLATION AND CONNECTION
2-5
1.2.3. Connections to control input and output terminals
Connect the control input and output terminals of all other connected units using 2 control lines.
Note
Be sure to connect only these control lines to other unit’s control input terminals.
Connecting in parallel with control lines from other equipment may cause the unit to malfunction.
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
To other unit's control input
To other unit's control input
To other unit's control output
[Control Output 1 – 8 Specications]
Open collector output
Withstand voltage: 30 V DC
Control current: 50 mA maximum
[Control Output 9 – 10 Specications]
Relay contact output
No polarity
Withstand voltage: 30 V DC
Control current: 0.5 A maximum
[Control input 1 – 8 specications]
No-voltage make contact input
Short-circuit current: 2 mA or less
Open-circuit voltage: 24 V
Contact make duration for detection:
Over 50 ms
Tip
See p. 2-7, "Removable Terminal Plug Connection" for control input and output terminals connection
procedures.

Chapter 2 INSTALLATION AND CONNECTION
2-6
[Control input connection for failure detection]
The function of detecting failures in wiring with external control output equipment can only be set to control
input terminal 8. For wiring for which failure detection is performed, insert resistors as shown below:
For instructions on setting the failure detection function to the control input terminal, see p. 3-56, "CONTROL
INPUT SETTINGS."
Notes
• Be sure to connect resistors as shown in the gure below. The failure detection function will not work
correctly if no resistors are connected, or if resistors of different values from those specied are used.
• To ensure stable NX-300 operation, it is recommended that failure detection wiring be made independent
from that of control input terminals 1 – 7, for which shielded twisted pair cables shorter than 10 m (32.81 ft)
should be used.
• Connect the cable’s shielded wire to the NX-300’s signal GND terminal.
1
2
ECH AUDIO OUTPUT ECH
AUDIO INPUT ECH ECH
GND
SIGNAL
LAN
AC ADAPTERDC INPUT
DC INPUT
109
CONTROL INPUT
CONTROL OUTPUT
12345 8C67
12345 8C67
ON
12345678
1212
GND LIFT LINE
PAD MIC
NORMAL
Wiring for which failure
detection is performed
To other unit's control output
10 kΩ ± 5%
10 kΩ ± 5%
Output control terminals for which failure detection is performed.
*
*Only Control Input Terminal 8 supports the control input failure detection function.
CONTROL INPUT 1 2 3 4 5 8 C6 7

Chapter 2 INSTALLATION AND CONNECTION
2-7
1.3. Removable Terminal Plug Connection
Solid cable and stranded cable Shielded cable
7 mm*27 mm*2
20 mm
(0.28") (0.28")
(0.79")
*2Expose 8 mm (0.31") or more when using
the above ferrule terminal, and cut off an
extra conductor protruding from the sleeve.
Note
Avoid soldering stranded or shielded cable,
as contact resistance may increase when
the cable is tightened and the solder is
crushed, possibly resulting in an excessive
rise in joint temperatures.
• Cable sheath to trim
Step 1. Wiring the supplied removable terminal plug.
1-1. Loosen the terminal screws to insert the wire.
1-2. Tighten the terminal screws.
Ensure that the wire does not break free when
pulled. If the wire does pull free, repeat the
connection procedure from the start.
Step 2. Insert the wired terminal plug into the corresponding
terminal block in the unit's rear panel.
Step 3. Tighten the xing screw (DC power input terminal
only).
Notes
• Do not reverse Steps 1 and 2 above. Poor contact may
result if force is applied to the unit's internal circuit board
pins while the terminal screws are being tightened.
• When detaching the terminal plug, pull it straight out.
Pulling it out at an angle may cause the terminal plug or
terminal block to break.
Fixing screw
Terminal screw
Removable terminal
plug (accessory)
Tightens Loosens
1
2
3
Slotted screwdriver
[Recommended type of screwdriver ]
Blade width*1
*1For DC power input terminal: About 3.5 mm (0.14")
For other terminals: About 2.5 mm (0.1")
109
CONTROL INPUT
1
CONTROL OUTPUT
24V 200mA LAN
AC ADAPTERDC INPUT
24V 200mA DC INPUT
1
GND
SIGNAL
Tips
• Applicable cable size
For DC power input terminal For other terminals
Conductor cross-section area 0.2 − 2.5 mm20.14 − 1.5 mm2
AWG AWG 24 − 12 or equivalent AWG 28 − 16 or equivalent
• When connecting 2 cables or a shielded cable to a single terminal, use a ferrule terminal with an insulation
sleeve to crimp the cables because such cable conductors could become loose.
(1) Recommended ferrule terminals for cables other than power supply cables
(made by Phoenix Contact)
(2) Recommended ferrule terminals for power supply cables
(made by Phoenix Contact)
Crimping tool: CRIMPFOX 10S (made by Phoenix Contact)
Insulation sleeve
Contact section
Insulation sleeve
Contact section
a
l2
a1
a2
l1
l2
l1
bb
Model Number a1l1l2
AI 1,5-8 BK
AI-TWIN 2x1,5-8 BK
6.6 (0.26)
a2
3.6 (0.14)
14 (0.55)
16 (0.63)2.3 (0.09)
8 (0.31)
8 (0.31)
a
3.4 (0.13)
Unit: mm (in)
b
1.8 (0.07)
Model Number a l1l2
AI 0,34-8 TQ
AI 0,5-8 WH
2 (0.08)
Unit: mm (in)
2.5 (0.1)
12.5 (0.49)
14 (0.55)
8 (0.31)
8 (0.31)
b
0.8 (0.03)
1.1 (0.04)

Chapter 2 INSTALLATION AND CONNECTION
2-8
NX-300
3 x 8 tapping screw*1
3 x 8 tapping screw*1
Rack mounting bracket*1
Blank bracket*1
Fiber washer (for M5) *1
5 x 12 rack mounting screw*1
3 x 14 tapping screw*1*1Component parts of MB-15B-BK
*2Component parts of MB-15B-J
NX-300
NX-300
3 x 14 tapping screw*2
3 x 14 tapping screw*2
Rack mounting bracket*2
Fiber washer (for M5)*2
Coupler*2
5 x 12 rack mounting screw*2
M3 x 12 machine screw*2
2. INSTALLATION
2.1. Rack Mounting
Use the optional mounting hardware set when installing the unit in an equipment rack.
2.1.1. When mounting a single unit
Use the optional MB-15B-BK hardware set when mounting a single unit.
2.1.2. When mounting 2 units
Use the optional MB-15B-J hardware set when mounting 2 units.
Note
The NX-300 and other equipment cannot be linked together and mounted in a rack using the MB-15B-J.

Chapter 2 INSTALLATION AND CONNECTION
2-9
2.2. Wall Mounting
Step 1. Install the optional YC-850 Wall Mounting Bracket to the NX-300.
YC-850 Wall mounting bracket
(Option)
Machine screw M3 x 6
(supplied with the YC-850)
Step 2. Mount the NX-300 on the wall.
Notes
• Use appropriate screws for the construction of wall.
• 3.5 x 20 wood screws are supplied with the YC-850.
[
Wall mounting dimensions
]
225.5 mm (8.88")
180 mm
(7.09")
3.5 x 20 wood screw
(supplied with the YC-850)