Schneider 140SAI94000S Analog Safety Input Module

Description

The Schneider Electric 140SAI94000S is a high-precision analog safety input module belonging to the Modicon Quantum automation platform. This module is specifically engineered for functional safety applications, providing a reliable interface for monitoring critical process variables. Certified by TÜV Rheinland for use in SIL2 environments, it ensures high integrity for data acquisition in industrial safety-related systems.

Specifications

• Product Range: Modicon Quantum automation platform
  
• Input Channels: 8 individual analog safety inputs
  
• Input Resolution: 16 bits for high-precision measurement
  
• Measuring Range: 0 to 25 mA linear scale
• Maximum Input: 35 mA absolute maximum
• Input Impedance: 287 Ohm
  
• Update Time: 15 ms for rapid signal processing
  
• Accuracy Error: +/- 0.3% (typical) to +/- 0.35% of full scale
  
• Isolation Voltage: 1500 V AC for 60 seconds (channels to bus)
  
• Bus Current Requirement: 400 mA
• Safety Certification: TÜV Rheinland (SIL2), UL, CSA HazLoc, and CE marking

Features

• Safety Integrity: Designed and certified to meet SIL2 standards, making it suitable for emergency shutdown and critical monitoring systems.
• Comprehensive Diagnostics: Features a dedicated LED array, including 8 green LEDs for status and 8 red LEDs for internal channel system failures.
  
• Signal Filtering: Utilizes a single-pole low-pass filter (3 dB at 15 Hz) to ensure stable readings in electrically noisy industrial environments.
  
• Robust Isolation: Provides 500 V AC isolation between channels to prevent cross-talk and protect internal circuitry from field-side surges.
• Real-time Monitoring: Supports an addressing requirement of 13 input words, allowing for detailed data transmission to the Quantum CPU.
  
• Fault Detection: Capable of detecting "overtacking scale" faults and external circuit issues, indicated immediately via the local red "F" LED.