Power Source
Supplied from an external 24 V 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 kΩ, LINE/MIC changeable, volume adjustable
Rated input: -20 dB (*2) (LINE)/-60 dB (*2) (MIC)
PAD function (-16 dB (*2)), removable terminal block (6 pins)
Audio Output
2 channels, balanced (transformer isolated), 600 Ω or less
Rated output: 0 dB (*2) (unbalanced input)/-2 dB (*2) (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, 48 kHz sampling frequency, PCM, BPF)
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 file
(16 kHz sampling frequency, sub-band-ADPCM, monaural operation)
Control Input
8 channels, no-voltage make contact input, open voltage: 24 V 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 kΩ ±5 %%%
Connection resistance to make the function active: 10 kΩ ±5 %%%
Connector cable: Twisted pair cable (shielded type is recommended)
Maximum cable distance: 10 m
Control Output
8 channels, open collector output (polarized), withstand voltage: 30 V DC, control current: 50 mA max., removable terminal block (9 pins)
2 channels, relay output (non-polar), withstand voltage: 30 V 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, UDP, ARP, HTTP, RTP, IGMPv2, 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 on the software)
Quantifying bit number: 16 bits
Voice encoding method: PCM, Sub-band ADPCM (controllable on 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) (*3)
File system: FAT16, FAT32
※ Use only SD memory cards rated at 100mA current consumption or less.
※ No SD card provided.
Installation Method
Rack, Desk, Surface mount
Operating Temperature
-10 ℃ to +50 ℃ (14 ゜F to 122 ゜F)
(0 ℃ to +40 ℃ (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
210 (W) × 44.3 (H) × 258 (D) mm (8.27″ x 1.74″ x 10.16″)
Weight
1.7 kg (3.75 lb)
Accessory
Removable terminal plug (3 pins) …1, Removable terminal plug (6 pins) …2, Removable terminal plug (9 pins) …2, Removable terminal plug (4 pins) …1, Plastic foot …4, Screw for fitting plastic foot …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
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