Triconex 3700A Analog Input Module - 32-Channel TMR Voltage Input

Triconex 3700/A Analog Input Module: High-Density TMR Signal Acquisition

The Triconex 3700/A Analog Input Module delivers reliable voltage monitoring for critical process applications. This TMR module from Triconex features 32 differential input points with advanced triple redundancy. The Triconex 3700A version specifically supports 0-5V range with +6% overrange capability for flexible signal conditioning.

Key Technical Specifications

• The Triconex 3700/A provides 32 differential DC-coupled inputs for precise measurement
• It features 12-bit resolution for accurate analog-to-digital conversion
• Voltage input range is 0-5V for the 3700A model with +6% overrange
• Input update rate is 55 milliseconds for real-time data acquisition
• Accuracy is <0.15% of Full Scale Range from 0° to 60° C
• Triple Modular Redundant architecture ensures maximum reliability

Input Characteristics and Performance

• Input resistance measures 30 MΩ (DC) minimum for minimal loading
• Power-off resistance is 30 kΩ (DC) typical for safety isolation
• Common mode rejection achieves -80 dB from DC to 100 Hz
• Common mode range spans -12V to +12V peak for noisy environments
• Leg-to-leg isolation provides 200 kΩ typical separation
• Also supports 0-20 mA current signals using 250 Ω shunt resistor

Noise Rejection and Protection Features

• Normal mode rejection provides excellent noise immunity
• Rejection levels are -3 dB at 8 Hz, -17 dB at 60 Hz, -23 dB at 120 Hz
• Input overrange protection handles 150 VDC/115 VAC continuous
• Three independent channels prevent single point failures
• Mid-value selection algorithm ensures correct data for every scan
• Module operates properly with up to two faulty channels

System Integration and Diagnostics

• Requires external termination panel (ETP) with cable interface
• Mechanical keying prevents improper chassis installation
• Hot-spare capability supports online replacement of faulty modules
• Module status indicators show PASS, FAULT, and ACTIVE conditions
• Comprehensive diagnostics continuously monitor all channels
• Distinctive yellow color code enables quick visual identification

Frequently Asked Questions (FAQ)

• How many input points does the 3700/A module provide?
  The Triconex 3700/A offers 32 differential analog input points for high-density signal acquisition
• What is the difference between 3700 and 3700A models?
  The Triconex 3700A specifically supports 0-5V voltage range with +6% overrange capability
• Does the module support current inputs?
  Yes, the Triconex 3700/A handles 0-20 mA current signals when used with a 250 Ω shunt resistor