I/O modules

Overview

The Triconex 3805E Analog Output Module is designed to deliver precise and reliable analog signals in safety-critical environments. Featuring a Triple Modular Redundancy (TMR) design, it ensures fault tolerance, continuous diagnostics, and hot-spare capability, making it an essential component in high-demand industrial and process control systems.

Key Features

• TMR Design for Robust Operation:
  • The module uses three channels to process signals independently. The healthiest channel drives the output, while non-selected channels remain isolated to prevent interference, ensuring continuous and safe operation.
• Active Diagnostic Monitoring:
  • Current loopback circuits verify the accuracy and presence of signals, even without a load. Faults in circuits or channels are identified promptly, triggering the Fault Indicator and chassis alarm, ensuring minimal disruption.
• Open Loop Detection with Immediate Feedback:
  • The LOAD Indicator provides real-time feedback when the module fails to drive current to any output, speeding up troubleshooting.
• Redundant Loop Power for Guaranteed Continuity:
  • Two external power sources (PWR1 and PWR2) ensure continuous operation, with indicators confirming the presence of power from both sources.
• Hot-Spare Capability for Minimal Downtime:
  • Technicians can replace faulty modules while the system remains online, ensuring smooth operation with reduced downtime.
• Mechanical Keying for Enhanced Safety:
  • The module features a mechanical keying system that prevents incorrect installation, protecting the system setup and ensuring safe operations.

Specifications

• Model Number: 3805E
• Type: TMR
• Output Current Range: 4-20 mA (+6% overrange)
• Number of Outputs: 8
• Point Isolation: Commoned return, DC coupled
• Resolution: 12 bits
• Output Accuracy: <0.25% (within 4-20 mA range) of full-scale range (FSR: 0-21.2 mA)
• Operating Temperature: 32°F to 140°F (0°C to 60°C)
• External Loop Power: Nominal +24 VDC; Max +42.5 VDC (reverse voltage protected)
• Output Loop Power Requirements:
  • 250 Ω Load: >20 VDC (1 amp min)
  • 500 Ω Load: >25 VDC (1 amp min)
  • 750 Ω Load: >30 VDC (1 amp min)
  • 1000 Ω Load: >35 VDC (1 amp min)
• Over-range Protection: Continuous up to +42.5 VDC
• Switch Time on Leg Failure: <10 ms (typical)
• Diagnostic Indicators: PASS, FAULT, ACTIVE, LOAD, PWR1, PWR2
• Color Code: Pea Green

Applications

• Process Control Systems: Ideal for industries like oil and gas, power generation, and chemical processing, providing reliable analog output for critical control systems.
• Turbomachinery Operations: Works effectively in demanding environments, often used alongside the 3806E High Current Module for enhanced performance.
• Safety-Critical Applications: The self-diagnostics and TMR design make this module essential in safety-critical systems requiring precise, dependable performance.

Details