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Home > Electrical & Electronics > Electrical Control System > NI SCXI-1162 Digital I/O Module

NI SCXI-1162 Digital I/O Module

NI SCXI-1162 Digital I/O Module thumbnail-3

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

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Material:

Other, Global universal model

Condition:

Other, Global universal model

Task:

Other, Global universal model

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Guizhou Yuanmiao Automation Equipment Co., Ltd.

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China

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Material Other, Global universal model

Condition Other, Global universal model

Task Other, Global universal model

Mathematical Model Other, Global universal model

Signal Other, Global universal model

Customized Non-Customized

Structure Other, Global universal model

Operating Temperature -40°C to +85°C

Dimensions 1.2×6.8×8.0 inches

Isolation Voltage 2500V rms

NI SCXI-1162I. Functional Positioning

The NI SCXI-1162 is an isolated analog input signal conditioning module specifically designed for industrial and research scenarios. Its core functions include isolating, amplifying, and filtering weak analog signals from sensors, adapting to signal acquisition in high-voltage interference environments. It is designed to ensure measurement accuracy and equipment safety in strong electrical interference (e.g., power systems, motor control) or multi-ground systems, often used with NI DAQ systems (such as PCIe-6356) and the LabVIEW platform.

II. Core Features and Technical Advantages

High-Level Electrical Isolation Design

Isolation Performance: Each channel provides 2500V rms operational isolation (channel-to-ground/channel-to-channel). Using transformer-coupled isolation technology, it effectively blocks ground loop noise and high-voltage transient interference, protecting downstream acquisition equipment from strong electrical damage.
Application Scenarios: Suitable for strong electrical environments such as power transformer monitoring, high-voltage motor control, and aerospace equipment testing.

Flexible Signal Processing Capability

Gain can be configured as 1, 10, 100, 1000 to adapt to sensor signals of different amplitudes (e.g., amplifying weak strain signals to the DAQ acquisition range).
Low-pass filter cutoff frequency is adjustable from 10Hz to 10kHz. Using an eighth-order elliptical filter design with an attenuation rate of 80dB/decade, it effectively filters out high-frequency noise such as electromagnetic interference (EMI).

Input Range: Supports multi-range voltage signals, including ±10V, ±5V, ±1V, ±100mV, compatible with output signals from thermocouples, strain gauges, pressure sensors, vibration sensors, etc.
Programmable Gain and Filtering:

High-Precision Calibration and Protection Mechanisms

Automatic Offset Calibration: Built-in calibration circuit grounds the input via software triggering to compensate for zero-drift errors. Calibration constants are stored in EEPROM to ensure long-term measurement accuracy (accuracy index: ±0.05% of reading + 2μV).
Overvoltage Protection: Input channels can withstand ±30V transient voltage to prevent module damage from sensor failures or wiring errors.

Modular and Compatible Design

Communication and Drivers: Relies on NI-DAQmx drivers (compatible with version 9.0 and above), supports development environments such as LabVIEW and LabWindows/CVI, and allows quick parameter configuration via the Measurement & Automation Explorer (MAX) tool.
System Expansion: Can be stacked with other SCXI modules (such as the SCXI-1125 filter module and SCXI-1141 amplifier module) to build customized signal conditioning systems.

III. Technical Specifications Table

Parameter Category	Specific Index
Number of Input Channels	8 analog input channels (differential input)
Input Range	±10V, ±5V, ±1V, ±100mV
Input Impedance	1MΩ (differential) / 10GΩ (common-mode)
Isolation Voltage	2500V rms (channel-to-ground / channel-to-channel)
Gain Configuration	1, 10, 100, 1000 (software programmable)
Filter Cutoff Frequency	10Hz to 10kHz (adjustable), attenuation rate 80dB/decade
Accuracy	±0.05% of reading + 2μV
Power Supply	±5V, ±15V (external power supplied by the SCXI chassis)
Operating Temperature	-40°C to +85°C
Dimensions	1.2×6.8×8.0 inches

IV. Typical Application Scenarios

Power System and High-Voltage Equipment Monitoring

Used for voltage acquisition of high-voltage busbars in substations and temperature monitoring of transformer windings (via thermocouples). 2500V isolation prevents high-voltage breakdown of equipment and enables real-time monitoring of grid harmonics, power factor, and other parameters.

Industrial Automation and Motor Control

Collects signals from servo motor torque sensors and vibration sensors. The isolation design avoids measurement interference from electromagnetic noise generated by frequency converters, supporting real-time data feedback for closed-loop control systems (such as robotic joint torque control).

New Energy and High-Voltage Testing

Processes high-voltage sensor signals (such as voltages of battery packs above 500V) in lithium battery charge/discharge testing; collects high-pressure gas pressure sensor data in fuel cell systems to ensure measurement system safety.

Scientific Research and Laboratory High-Precision Measurement

Compatible with high-precision devices such as strain gauges and piezoelectric sensors, used in scenarios like material fatigue testing and structural vibration analysis. High isolation avoids measurement errors caused by ground potential differences between multiple devices.

V. Working Principle and Hardware Architecture

Core Components and Signal Flow

Input Front-End: Includes TVS diode overvoltage protection circuits and signal buffers to limit transient voltage and match sensor output impedance (such as 100Ω strain gauges).
Isolation Amplification Module: Uses high-isolation instrumentation amplifiers (such as AD210) to achieve signal transmission via transformer coupling, with a common-mode rejection ratio (CMRR) >110dB to effectively suppress common-mode interference.
Filtering and Calibration Unit: Eighth-order low-pass elliptical filter with programmable cutoff frequency via switched-capacitor technology; the calibration circuit grounds the input when triggered, calculates offset errors, stores them in EEPROM, and automatically compensates during subsequent acquisitions.

Electrical Isolation Mechanism

The isolation layer fully electrically separates the input and output circuits, blocking ground loop current paths (such as interference currents caused by ground potential differences in different devices), suitable for multi-ground systems or high-voltage common-mode voltage environments (such as unbalanced grounding resistance scenarios).

VI. Comparison with Other SCXI Modules

Module Model	Isolation Voltage	Typical Applications	Core Differences
SCXI-1162	2500V rms	High-voltage environments, strong electrical interference scenarios	High isolation, suitable for power and high-voltage testing fields; similar functions to SCXI-1160 with the same channel configuration.
SCXI-1160	2500V rms	Same as SCXI-1162	Basically identical technical parameters to SCXI-1162, with possible no differences in channel count or detailed functions (refer to official documents for sub-model differences).
SCXI-1125	300V rms	General signal acquisition in industrial noise environments	Lower isolation, suitable for medium-low voltage scenarios (such as sensor signal conditioning in factory assembly lines).
SCXI-1141	No isolation	Filtering and amplification of sensor signals	Focused on filtering and amplification without isolation, suitable for laboratory scenarios with minimal interference.

VII. Summary

The NI SCXI-1162 takes 2500V rms high isolation performance and programmable signal conditioning capabilities as its core advantages, serving as a key module for data acquisition in high-voltage and strong interference environments. Its design balances measurement accuracy and equipment safety, is widely used in power, industrial automation, new energy, and other fields, and can build flexible high-precision acquisition solutions in combination with NI modular systems.

Product Tags: SCXI-1162 , SCXI-1162HV , SCXI-1104C