ICS Triplex T8403 Trusted TMR 24Vdc Digital Input Module

Description

The ICS Triplex T8403 is a high-density, 40-channel digital input module designed for the Trusted Triple Modular Redundancy (TMR) system. It provides a fault-tolerant interface for 24 Vdc field signals, ensuring high-integrity monitoring of critical sensors and switches in safety-instrumented applications.

Specifications

• Manufacturer: Rockwell Automation (ICS Triplex).

• Country of Origin: United Kingdom.

• Model Number: T8403.

• Number of Channels: 40 isolated input points.

• Input Voltage: 24 Vdc nominal.

• Input Threshold: 11 Vdc to 15 Vdc.

• Physical Weight: Approximately 1.5 kg (3.3 lbs).

• Dimensions: 10.5" x 1.2" x 7.8" (266 mm x 31 mm x 198 mm).

• Power Consumption: 15 Watts maximum.

• Update Rate: 1 millisecond.

• Safety Rating: TÜV approved for SIL3 applications.

Features

• Triple Modular Redundancy: Processes each input through three independent circuits with hardware-based voting to eliminate single points of failure.

• Line Supervision: Detects open-circuit and short-circuit faults in field wiring through integrated current sensing for both dry and powered contacts.

• Sequence of Events (SOE): Supports high-resolution time-stamping of input transitions for precise post-event analysis.

• Hot-Swap Capability: Allows the module to be removed and replaced while the safety system remains operational without process interruption.

• Internal Self-Testing: Performs continuous background diagnostics on input filters and opto-isolators to ensure hardware integrity.

• Diagnostic Indicators: Equipped with front-panel LEDs for individual channel state, module healthy status, and field wiring faults.