Triconex 3503E TMR Digital Input Module

Description

The Model 3503E is a Triple Modular Redundant (TMR) digital input module designed to ensure high reliability and safety for industrial applications. It is specifically designed to detect stuck-ON conditions where the circuitry cannot tell whether a point has gone to the OFF state, which is crucial for safety systems that operate with a de-energize-to-trip capability.

Features

• Three isolated input channels: Each channel processes data independently.
• Optical isolation: Provides isolation between the field and the Tricon.
• Self-testing capability: Detects stuck-ON conditions and ensures accurate OFF state detection.
• Hot-spare capability: Allows for on-the-fly replacement without system shutdown.
• Ongoing diagnostics: Constant monitoring of each channel with fault indicators for rapid issue identification.
• Separate external termination panel (ETP): Facilitates cable interface to the Tricon backplane.
• Mechanical keying: Prevents improper installation in a configured chassis.

Technical Specifications

• Type: TMR with Self-Test
• Voltage: 24 VAC/VDC
• Points: 32, commoned in groups of 8
• AC Range: 20-42.5 VAC/VDC
• Frequency Range: DC or 47-63 Hz
• Maximum Voltage: 42.5 VAC/VDC
• Switching Level:
  • OFF to ON: > 18 VAC/VDC
  • ON to OFF: < 6 VAC/VDC
    

Application

The 3503E module is suitable for applications requiring high safety and reliability, such as those in the petrochemical, power generation, and manufacturing industries. It ensures that critical input signals are accurately processed and maintained even in the presence of faults, thus providing a robust solution for safety-critical systems​​.