Channel & Wiring Configuration

• 8 differential signal channel pairs plus 1 dedicated chassis safety ground terminal
• Per-channel independent rear slide switches for attenuation mode switching
• 18 total gold-plated captive screw terminals, wire gauge support: 28 AWG to 14 AWG
• Rear direct plug-in 96-pin shielded DIN connector for matched SCXI modules
• Built-in strain-relief bar to prevent field wiring loose displacement

Attenuator Electrical Parameters

• Two selectable attenuation ratios: 1:1 bypass mode / 100:1 voltage division mode
• 100:1 ratio accuracy: ±0.06% FSR at 25℃, temperature drift: 15 ppm/°C
• Channel input resistance: 1 MΩ under 100:1 mode; inherit module impedance under 1:1 mode
• Signal coupling: DC-only coupling, no AC high-pass filtering capability

High-Voltage Safety Ratings

• Max continuous channel-to-ground voltage: ±300 VDC / 300 Vrms
• Max continuous channel-to-channel voltage: ±300 VDC / 300 Vrms
• Transient surge withstand: 1000 V 1μs lightning surge pulse
• Safety standard compliance: IEC 61010 CAT II, pollution degree 2
• Mandatory safety lug for external protective earth grounding

CJC Thermistor Specifications

• Sensor type: High-precision NTC thermistor for cold junction compensation
• Temperature output range: 0–50℃, corresponding voltage output 0.65–1.91 VDC
• Measurement accuracy: ±0.9℃ (15–35℃); ±1.3℃ (0–15℃ & 35–50℃)
• Max allowable temperature gradient between sensor and terminals: ±0.4℃

Key Passive Device Specifications

• Device type: Fully passive terminal block, zero backplane power consumption
• Terminal tightening torque: 5–7 in.-lb for stable gas-tight wiring
• Channel crosstalk: <-80 dB at 1 kHz under full shielding
• Insulation resistance: >1 GΩ between signal circuits and shielding shell

Mechanical & Environmental Specifications

• Dimension: 172×42×32 mm, standard half-height SCXI front accessory
• Housing: Flame-retardant PC shell with integrated metal EMI shielding cover
• Operating temperature: 0℃ ~ +50℃, humidity: 10%–90% non-condensing
• EMC certification: CE, FCC Class A, C-Tick industrial electromagnetic compliance

Compatibility Matching List

• Exclusive compatible input modules: SCXI-1120, 1120D, 1121, 1125, 1126
• Special usage note: Bypass attenuation for SCXI-1121 excitation output channels
• Compatible chassis: SCXI-1000, SCXI-1001
• Official status: Obsolete, only aftermarket replacement inventory available

Software Compatibility

• Drivers: No dedicated driver, compatible with NI-DAQmx, Traditional NI-DAQ
• Configuration tools: NI MAX, LabVIEW native temperature conversion VIs
• Supported software: LabVIEW, LabWindows/CVI, Python DAQmx, C#

Pros & Limitations

• Pros: Per-channel independent attenuation switching, built-in high-precision CJC, 300V high safety isolation, full EMI shielding, captive anti-loose terminals, zero power consumption
• Limitations: Only compatible with five specific SCXI modules, DC signal only, no built-in surge suppression, cannot match SCXI-1102 series