| 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 |
