Triconex 3401 DO Module 16 Point TMR Digital Output Safety Unit

3401 Triconex TMR Digital Output Module for Industrial Safety

The 3401 stands as a high-availability Triple Modular Redundant (TMR) digital output solution designed by Schneider Electric. This module utilizes three isolated internal channels that independently process data from the Main Processors for industrial safety. The 3401 delivers superior reliability through patented Quad Voter circuitry that ensures continuous operation even during individual channel failures. Engineers trust the Triconex 3401 for critical control paths where unplanned downtime poses significant risks to personnel and equipment.

Technical Specifications

• Manufacturer: Schneider Electric / Triconex
• Model Number: 3401
• Output Points: 16 points, commoned configuration
• Nominal Voltage: 24 VDC with an operational range of 15 to 30 VDC
• Maximum Output: 33 VDC absolute maximum voltage with -0.6 VDC reverse input protection
• Switching Current: 3.0 A typical per point, self-limiting at 4.8 A maximum
• Degraded Mode: 1.5 A typical, self-limiting at > 0.7 A
• Leakage Current: Less than 1 mA in the off state to prevent ghost signals
• Diagnostic Glitch: Typical duration of 500 microseconds with a maximum limit of 2 milliseconds
• Isolation: 800 VDC logic isolation and 500 VDC functional earth to protective earth isolation
• Scan Performance: Loop-back scan time under 1.0 millisecond for all 16 points simultaneously
• Toggle Rate: Supports a maximum toggle rate greater than 20 milliseconds for high-speed switching

Installation and Logistics Guide

• Verify the baseplate keying matches the Triconex 3401 physical slot to avoid damaging internal electronic components.
• Ensure field power remains within the 15 to 30 VDC range to prevent nuisance field power alarms.
• Confirm the load current does not exceed the 3.0 A typical rating to maintain long-term switch reliability.
• Package List: One 3401 Digital Output Module, Industrial Grade Protective Packaging, and Hardware Technical Data Sheet.
• Shipping Carriers: We provide worldwide express delivery via Fedex, UPS, and DHL.
• Contact Inquiries: info@oiltechcontrols.com or +86 158 8020 0923

Frequently Asked Questions

• How does the OVD routine affect my field load during the diagnostic cycle?
  The diagnostic glitch lasts less than 2 milliseconds, which is too fast for most industrial actuators to move.
• What happens if the Fault indicator turns on while the system is running?
  The indicator marks a single channel fault, but the module continues to operate safely using the remaining channels.
• Can I use this module for high-speed pulse applications?
  We recommend a maximum toggle rate of 20 milliseconds to ensure the loop-back diagnostics accurately verify every state.
• Selection Guide: Should I choose the 3401 or the 3401E for my project?
  Select the 3401 for standard 24 VDC commoned loads; check the 3401E if you require extended environmental specifications.
• Author: Oiltech Controls

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