NI SCXI-1162

Product Name 32-Channel Optically Isolated Digital Input Module

Product Introduction The SCXI-1162 is a 32-channel optically isolated digital input module for SCXI signal conditioning systems. It provides electrical isolation between field signals and the control system, supporting TTL, CMOS and other common logic level signal acquisition.

Category:
Description

Functional Features

  • 32 optically isolated digital input channels
  • 8 isolated banks of 4 channels each
  • 300 Vrms Category II working isolation per bank
  • 2,300 Vrms transient overvoltage protection
  • Accepts TTL, CMOS logic levels and +5 V to +10 V reference signals
  • Input impedance: 360 Ohms per channel
  • Supports serial multiplexed mode via SCXIbus and high-speed parallel mode
  • Serial data rate: 580 reads per second

Technical Specifications

  • Brand: National Instruments
  • Model: SCXI-1162
  • Product Type: Isolated Digital Input Module
  • Channel Count: 32 digital inputs
  • Isolation: 300 Vrms working isolation per bank, 2300 Vrms transient protection
  • Input Logic Levels: TTL, CMOS, +5 V to +10 V
  • Input Impedance: 360 Ω
  • Operating Mode: Serial multiplexed mode, high-speed parallel mode
  • Compatible Software: NI-DAQmx, LabVIEW, LabWindows/CVI, Measurement Studio
  • Part Number: 182246E-01

Application Scenarios

  • Industrial digital signal monitoring and acquisition
  • Process control status detection
  • High-voltage industrial control system interface
  • Factory automation equipment status feedback
  • Isolated digital signal transmission in noisy environments

Working Principle Each input channel uses an optocoupler to transmit digital signals across an electrical isolation barrier. This eliminates ground loops and protects the control system from high-voltage transients on the field side, while accurately passing logic level signals to the DAQ system.

Installation Requirements

  • Install in standard SCXI chassis slots
  • Connect field signals via compatible terminal blocks (SCXI-1326 recommended)
  • Ensure proper grounding of isolation barriers
  • Configure input mode and data transfer protocol via DAQ software

Usage Notes

  • Observe isolation voltage ratings to prevent equipment damage and safety hazards
  • Verify signal logic levels match module input specifications
  • Do not apply voltages exceeding maximum input ratings
  • Perform periodic insulation resistance testing in harsh environments
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