Triconex 3503E Digital Input Module - 32-Channel 24VAC/DC

Triconex 3503E Digital Input Module: High-Density TMR Safety Solution

The Triconex 3503E Digital Input Module delivers triple modular redundant safety for critical industrial applications. This advanced TMR module from Triconex features 32 input points with comprehensive self-test diagnostics. The Triconex 3503E ensures maximum system availability with 100% triplicated critical signal paths and continuous channel monitoring.

Key Technical Specifications

• The Triconex 3503E provides 32 digital input points commoned in groups of eight
• It accepts both 24 VAC and 24 VDC input signals with wide voltage range
• The module supports DC or 47-63 Hz AC frequency operation for flexibility
• Recommended input range spans from 20 to 42.5 VAC/VDC for optimal performance
• Maximum voltage rating is 42.5 VAC/VDC for robust operation
• Each channel provides 1,500 VDC point isolation for safety

Switching Characteristics and Performance

• Switch from OFF to ON occurs at >18 VAC/VDC with fast response
• Switch from ON to OFF happens at <6 VAC/VDC for reliable operation
• Input delays are <8 ms for OFF to ON and <15 ms for ON to OFF
• Typical hysteresis of 4 VAC/VDC prevents contact chatter
• Nominal turn-on current ranges from 6-9 mA for efficient operation
• Input impedance exceeds 1.25 kΩ for minimal loading

Advanced TMR Architecture and Diagnostics

• Triple Modular Redundant design ensures continuous operation during single faults
• Three isolated channels independently process all input data
• Comprehensive self-test capability detects stuck-ON conditions automatically
• Optical isolation provides complete field-to-system protection
• Diagnostic indicators show PASS, FAULT, and ACTIVE module status
• Individual input status indicators for each of the 32 points

Power Requirements and Physical Design

• Nominal field power load is 0.5 watts per ON point for efficiency
• Maximum power consumption reaches 1.5 watts at maximum field voltage
• The distinctive dark red color code enables quick visual identification
• Module is mechanically keyed to prevent incorrect chassis installation
• Requires external termination panel (ETP) with cable interface
• Supports hot-spare capability for maximum system availability

Frequently Asked Questions (FAQ)

• How many input points does the 3503E module have?
  The Triconex 3503E provides 32 digital input points organized in eight groups of four commoned points
• What types of input signals does it support?
  It handles both 24 VAC and 24 VDC input signals with a wide operating range from 20 to 42.5 volts
• Does the module include self-test features?
  Yes, the Triconex 3503E includes advanced self-test diagnostics that automatically detect stuck-ON conditions for safety-critical applications