Product Overview

The NI SCXI-1100 is an 8-channel,high-performance analog input module developed by National Instruments(now part of Emerson as part of the Test&Measurement portfolio)for use in SCXI(Signal Conditioning eXtensions for Instrumentation)modular data acquisition systems.Designed for precision measurement in demanding laboratory,industrial,and field environments,the NI SCXI-1100 provides versatile voltage input capabilities with exceptional noise rejection,galvanic isolation,and flexible configuration—making it a foundational component in applications ranging from power quality analysis to structural health monitoring.

Each of the eight channels on the NI SCXI-1100 supports software-selectable single-ended or differential inputs with a full-scale range of±10 V,and features independent amplification and filtering stages.Critically,every channel is electrically isolated from all others and from the system ground by up to 250 Vrms,enabling safe and accurate measurements in floating or high-common-mode-voltage scenarios—such as monitoring voltages across shunt resistors in motor drives or acquiring signals from sensors in ungrounded machinery.The module connects to any SCXI chassis(e.g.,SCXI-1000,SCXI-1001)and interfaces with NI DAQ devices like PCI-6251 or USB-6259 via a shielded multi-conductor cable,forming a scalable,high-channel-count acquisition system under unified control through NI-DAQmx driver software.

Engineered for low-noise performance,the NI SCXI-1100 includes built-in low-pass filtering and high-input impedance(>1 GΩ),minimizing loading effects on sensitive sources.While optimized for voltage signals,it can also interface with temperature sensors(thermocouples,RTDs)and strain gauges when used with external signal conditioning or excitation circuitry.Its robust metal enclosure and DIN-rail-compatible mounting options make it suitable for both benchtop prototyping and permanent industrial installations.

Technical Specifications

Parameter Name Parameter Value

Model SCXI-1100

Manufacturer National Instruments(NI)

Channels 8 analog input channels

Input Type Software-configurable:differential or single-ended

Voltage Range±10 V(fixed range)

Input Impedance>1 GΩ(single-ended),>2 GΩ(differential)

Isolation 250 Vrms channel-to-channel and channel-to-ground

Bandwidth DC to 10 kHz(-3 dB)

Noise(RMS)<40µV(for±10 V range)

Gain Accuracy±0.05%of reading

Common-Mode Rejection Ratio(CMRR)>100 dB at 60 Hz

Sampling Method Multiplexed(shared ADC via host DAQ device)

Connector Type Screw-terminal block(removable)

Compatible Chassis SCXI-1000,SCXI-1001,SCXI-1000DC

Software Support NI-DAQmx,LabVIEW,MATLAB,Python(via nidaqmx)

Dimensions 216 mm×25 mm×180 mm(W×H×D)

Operating Temperature 0°C to+50°C

Main Features and Advantages

High Channel Isolation for Safety and Accuracy:

The NI SCXI-1100’s 250 Vrms per-channel isolation allows users to measure signals that float at different potentials—critical when monitoring multiple points in a high-voltage system(e.g.,battery stacks,motor phases,or power converters).This prevents ground loops and protects both equipment and operators.

Flexible Input Configuration:

Each channel can be independently configured in software as single-ended or differential,enabling optimal use of available channels without hardware changes.Differential mode doubles noise immunity,making it ideal for long cable runs or electrically noisy plants.

Low-Noise,High-Impedance Front End:

With>1 GΩinput impedance and sub-40µV noise floor,the NI SCXI-1100 minimizes signal distortion from source loading and electromagnetic interference—essential for measuring low-level outputs from piezoelectric sensors,bridge circuits,or high-impedance probes.

Seamless Integration with NI Ecosystem:

Fully supported by NI-DAQmx,the module integrates effortlessly into LabVIEW,SignalExpress,or custom applications in C/C++,Python,or.NET.Automatic device detection,calibration support,and channel scaling reduce development time and improve measurement traceability.

Industrial-Rugged Design:

Housed in a grounded metal enclosure with removable screw terminals,the NI SCXI-1100 withstands vibration,EMI,and temperature variations typical of factory floors or energy test cells—while remaining compatible with benchtop R&D setups.

Application Field

The NI SCXI-1100 is widely used in power electronics testing,where engineers monitor DC bus voltages,inverter output waveforms,and shunt-based current measurements across isolated domains.In automotive R&D,it acquires battery cell voltages in EV test rigs,ensuring each cell’s potential is measured independently without reference conflicts.In aerospace structural testing,the module captures strain gauge outputs(with external excitation)during fatigue cycles,leveraging its noise immunity for microstrain resolution.

In industrial automation validation,the NI SCXI-1100 verifies PLC analog output cards or sensor calibrations by providing a trusted reference measurement system.Academic and government labs employ it in physics experiments requiring floating voltage measurements,such as plasma diagnostics or electrochemical cell monitoring.Because SCXI systems support daisy-chaining multiple modules,the NI SCXI-1100 often serves as one building block in large-scale data acquisition arrays—combining with thermocouple(SCXI-1102),strain(SCXI-1520),or high-voltage(SCXI-1125)modules in a single chassis.

Related Products

SCXI-1102:8-channel thermocouple/low-voltage input module with cold-junction compensation

SCXI-1125:8-channel isolated high-voltage input module(±42 V)

SCXI-1520:Universal strain gauge and bridge input module

SCXI-1000/SCXI-1001:Modular chassis for housing SCXI modules

PCI-6251/USB-6259:DAQ devices that interface with SCXI systems

NI-DAQmx:Driver software for configuration,calibration,and data acquisition

BNC-2110/SCXI-1313:Terminal blocks and accessory kits for signal routing

PXIe-4300:Modern PXI-based high-voltage analog input alternative(successor platform)

Installation and Maintenance

Installation Guidelines:

Mount the NI SCXI-1100 in a compatible SCXI chassis and secure it with the provided latch.Connect the chassis to a supported NI DAQ device using the SH68-68-EP or similar shielded cable.Wire field signals to the removable screw-terminal block using 16–26 AWG wire;ensure proper torque(~0.22 N·m)to avoid intermittent connections.For differential measurements,connect both(+)and(–)inputs;for single-ended,tie(–)to AI GND.Configure channels in NI MAX or programmatically via NI-DAQmx before acquisition.

Maintenance Tips:

Periodically inspect terminal blocks for corrosion or looseness,especially in humid or high-vibration environments.Recalibrate the system annually or per ISO/IEC 17025 requirements using NI-certified services.Avoid exceeding the 250 Vrms isolation limit—even momentarily—as this can damage internal opto-isolators.Store spare modules in anti-static packaging away from magnetic fields and extreme temperatures.

Product Guarantee

We guarantee that every NI SCXI-1100 module we supply is 100%genuine,fully tested,and sourced from traceable channels—including factory surplus,decommissioned test systems,or original NI inventory.Each unit undergoes functional verification of all 8 channels for gain accuracy,noise floor,and isolation integrity using calibrated NI equipment.The NI SCXI-1100 comes with a 12-month warranty and includes access to technical documentation and compatibility support.Whether you’re maintaining legacy test stands or expanding a research DAQ system,our commitment ensures you receive reliable,authentic hardware that performs to National Instruments’original specifications—because in precision measurement,trust starts with the signal chain.

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