Name: ICS Triplex T8403 | Trusted TMR 24Vdc Digital Input Module - XINYEDA
Brand: ICS Triplex

Description

Model Number: T8403

Manufacturer: ICS Triplex

Product Type: Trusted TMR 24Vdc Digital Input Module

Number of Channels: 40 isolated digital input channels

Input Voltage: 24V DC nominal

Fault Tolerance: Triple Modular Redundancy (TMR) architecture

Isolation: 2500V impulse withstand opto/galvanic isolation barrier

SOE Resolution: 1ms on-board Sequence of Events reporting

Digital Filtering: Configurable 50/60 Hz filtering

Operating Temperature: -5°C to +60°C

Storage Temperature: -25°C to +70°C

Humidity Range: 5% to 95% RH (non-condensing)

Dimensions: 3.2cm × 30.5cm × 26.5cm

Weight: 1.18kg

Safety Certification: SIL 3 per IEC 61508, CE, UL, CSA

ICS TRIPLEX T8403

Core Features & Customer Value

Triple Modular Redundant Architecture: The T8403’s TMR design incorporates three separate processing channels that execute identical operations and vote on outputs. For engineering teams, this architecture provides fault tolerance that prevents single component failures from causing dangerous system states. In practical terms, this means that a failure in one processing leg can be detected and compensated for by the remaining two legs, maintaining system operation while alerting maintenance personnel to the need for repair. This capability is particularly valuable in continuous process industries where unplanned shutdowns result in significant production losses.

Comprehensive Line Monitoring: The module features selectable line monitoring per channel to detect open circuit and short circuit field wiring faults. When a line-monitoring device is installed at the field switch, the module can detect open and short circuit field cables. Line monitoring functions are independently configured for each input channel, providing engineers with detailed diagnostic information about field wiring integrity. This capability allows for proactive maintenance scheduling rather than reactive repairs, reducing system downtime and improving overall plant availability.

Advanced Diagnostic Capabilities: The T8403 includes comprehensive, automatic diagnostics and self-test functions that continuously monitor system health. The triplicated voltage measurement, coupled with on-board diagnostic testing, provides comprehensive fault detection and tolerance. The module provides on-board Sequence of Events (SOE) reporting with a resolution of 1ms, where a change of state triggers an SOE entry. This high-resolution event logging enables engineers to precisely analyze process events and troubleshoot system issues more effectively.

ICS TRIPLEX T8403

Typical Applications

The T8403 is predominantly deployed in emergency shutdown systems within hydrocarbon processing facilities. In offshore production platforms, it typically interfaces with safety-critical field devices such as emergency stop buttons, pressure switches, and level switches. The module’s robust design and high channel density make it suitable for the space-constrained environments typical of offshore installations, where reliability is paramount due to the challenging access for maintenance.

In refinery applications, this module is commonly specified for fire and gas detection systems, where it monitors inputs from gas detectors, flame detectors, and smoke detectors. The SIL 3 certification ensures compliance with the safety integrity requirements for such critical functions. The module’s 1ms SOE resolution provides precise timing information for event analysis, which is essential for investigating process upsets and safety system activations.

The module also finds application in power generation plants, particularly combined-cycle and nuclear facilities, where it provides the interface for safety-related field devices in turbine protection systems and reactor protection systems. The wide operating temperature range allows deployment in unmanned remote locations with varying environmental conditions, while the configurable 50/60 Hz digital filtering eliminates field-induced noise, ensuring reliable operation in electrically noisy industrial environments.

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