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3700A

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November 26, 2025
Category Connection: Triconex
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Tags:
#Main Processor Module #Triconex 4000016-015 #Triconex Communication Module
Brief: This video demonstrates the setup, operation, and key diagnostic features of the Triconex 3700A Analog Input Module. You'll see how this 32-channel module converts field signals with 12-bit resolution, handles fault detection without interrupting operations, and enables hot-swap replacement in critical control systems.
Related Product Features:
  • The 3700A module provides 32 differential analog input channels with 12-bit resolution for precise signal monitoring.
  • It operates in TMR (Triple Modular Redundant) mode using a mid-value selection algorithm for fault-tolerant data processing.
  • Continuous diagnostics monitor all channels, with fault indicators activating for individual channel failures without module shutdown.
  • Supports hot-spare capability for online replacement of faulty modules without interrupting system operation.
  • Features input overrange protection up to 150 VDC / 115 VAC continuous for robust field operation.
  • Offers high common mode rejection of -80 dB (DC-100Hz) and leg-to-leg isolation of 200 kΩ typical.
  • Requires external termination panel (ETP) with cable interface to Tricon backplane for proper installation.
  • Mechanically keyed design ensures correct installation in Tricon chassis for reliable system integration.
FAQs:
  • What is the resolution and number of input channels on the 3700A module?
    The 3700A Triconex Analog Input Module provides 32 differential input channels with 12-bit resolution for precise analog signal conversion.
  • How does the module handle channel failures without disrupting system operation?
    The module uses continuous diagnostics and individual channel fault indicators. It can continue operating with up to two faulty channels, and the fault indicator reports channel-level issues rather than complete module failure.
  • Can the 3700A module be replaced while the system is running?
    Yes, the module supports hot-spare capability, allowing for online replacement of a faulty module without interrupting the Tricon system's operation.
  • What input voltage and current ranges does the 3700A module support?
    The module supports 0-5V voltage inputs and 0-20 mA current ranges with a 250 Ω shunt, providing flexibility for various field device connections.
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