TOA NX-300 Network Audio Adapter

TOA NX-300 Network Audio Adapter

The NX-300 is a network audio adapter that makes use of packet audio technology(*). Real-time transmission of high-quality audio or contact control signals is possible when the NX-300 is connected to a network (LAN or WAN). Systems can be built without the requirement for additional wire because existing networks can be utilised. Additionally, stations, factories, or other central facilities can broadcast audio files utilising up to 8 levels of priority control to specific bases. It can be put on a wall using an optional wall mounting bracket or on an EIA equipment rack (1U size) using an optional rack mounting bracket. The TOA NX-300 incorporates a special technology developed by TOA that enables real-time, high-quality audio signal transmission via an IP network.

Specifications

• Power Source: Supplied from an external 24V DC (21.6 - 26.4 V) power supply or AC adapter AD-246 (option) or the equivalent
• Power/Current Consumption: 10 W (AC operation), 310 mA (DC operation)
• Audio Input: 2 channels, balanced (transformer isolated)/unbalanced changeable, 2 k ohms, LINE/MIC changeable, volume adjustable, Rated input: -20 dB(*1) (LINE)/-60 dB(*1) (MIC), PAD function (-16 dB(*1)), removable terminal block (6 pins)
• Audio Output: 2 channels, balanced (transformer isolated), 600 ohms or less, Rated output: 0 dB(*1) (unbalanced input) /-2 dB(*1) (balanced input), removable terminal block (6 pins)
• Frequency Response: 50 Hz - 18 kHz (48 kHz sampling frequency, PCM, 0 to -6 dB deviation referred to 1 kHz)
• Distortion: 0.2 % or less (1 kHz, LINE signal level, at rated output)
• Signal to Noise Ratio: 73 dB or more (LINE signal level, at rated output)
• Separation: 70 dB or more (1 kHz, LINE signal level, BPF)
• Audio Format: WAV file
• Number of Storable Audio Files: Max. 8
• Storable Time of Audio File: Max. 2 min. per audio fi le (16 kHz sampling frequency, sub-band-ADPCM, monaural operation)
• Control Input: 8 channels, no-voltage make contact input, Open voltage: 24V DC, short-circuit current: 2 mA or less, removable terminal block (9 pins) (Only Channel 8 equipped with failure detection.)
• Control Input Failure Detection Section: Connection resistance to make the function inactive: 20 kohms -/+ 5 %, Connection resistance to make the function active: 10 kohms -/+ 5 %, Connector cable: Twisted pair cable (shielded type is recommended) Control Output: 8 channels, open collector output (polarized), withstand voltage: 30V DC, control current: 50 mA max., removable terminal block(9 pins), 2 channels, relay output (non-polar), withstand voltage: 30V DC, control current: 500 mA max., removable terminal block(4 pins)
• Network Section: Network I/F: 10BASE-T/100BASE-TX, Full-duplex/half-duplex Auto-negotiation, Network Protocol: TCP, UDF, ARP, HTTP, RTP, IGMP, FTP, NTP, Audio packet transmission system: unicast (Up to 16 simultaneous transmissions), multicast (Up to 64 simultaneous transmissions) Connector: RJ45 connector, Voice sampling frequency: 8 kHz, 16 kHz, 32 kHz, 48 kHz (controllable by the software), Qualifying bit number: 16 bits, Voice encoding method: PCM, sub-band ADPCM (controllable by the software), Voice packet loss recovery: Silence insertion, Audio delay time: Min. 20 ms
• Operation: 2 channels, Audio input level control (convertible to Audio output level control)
• Indicator: 2 channels, audio input, SIGNAL (green)/PEAK (red), 2 channels, audio output, SIGNAL (green)
• LNK/ACT (green), BUSY (green), STATUS (green), ERROR (yellow), RUN (green)
• Setting switch: Reset, grand lift changeable, audio input 2 channels PAD changeable, audio input 2 channels LINE/MIC changeable
• SD Section: For log storage (Max. 10000) Media: SD/SDHC card (Max. 32 GB) (*2) File system: FAT16. FAT32 *Use only SD memory cards rated at 100 mA current consumption or less *No SD card provided
• Installation Method: Rack, Desk, Surface mount
• Operating Temperature: -10°C to + 50°C (14 °F to 122 °F), (0°C to + 40°C (32 °F to 104 °F) when AC adapter is in use.)
• Operating Humidity: 90 % RH or less (no condensation)
• Finish: Pre-coated steel plate, black, 30% gloss
• Dimensions (W x H x D): 210 x 44.3 x 258 mm (8.27” x 1.74” x 10.16”)
• Weight: 1.7 kg (3.75 lbs.)
• Accessory: Removable terminal block (3 pins) x 1, Removable terminal block (6 pins) x 2, Removable terminal block (9 pins) x 2, Removable terminal block (4 pins) x 1, Plastic foot x 4, Screw for fitting plastic foot x 4
• Option: Rack mounting bracket: MB-15B-BK (for rack mounting one NX-300 unit), MB-15B-J (for rack mounting two NX-300 units) Wall mounting bracket: YC-850, AC adapter: AD-246

(*1) 0dB = 1V (*2) Not compatible with SDXC memory cards