ICS Triplex T8424C 120V AC Digital Input Module

The ICS Triplex T8424C is a high-reliability digital input module designed for industrial automation and safety-critical systems. It operates with 120V AC signals and supports up to 40 field input devices using a Triple Modular Redundant (TMR) architecture. This module ensures continuous operation with fault tolerance, comprehensive diagnostics, and SIL 3 certification for de-energize-to-trip applications.

Key Features

The T8424C combines fault-tolerant design with advanced monitoring for industrial applications requiring high availability.

• Triple Modular Redundant Architecture: Ensures 2oo3 internal voting per channel for maximum reliability.
• Input Channels: Supports up to 40 digital inputs with fault-tolerant redundancy.
• Diagnostics: Built-in automatic self-testing detects failures and reports module status continuously.
• Isolation: 2500 V opto/galvanic isolation separates inputs from module electronics.
• Sequence of Events (SOE): Onboard reporting with 1 ms resolution captures state changes.
• Hot Replacement: Supports online hot-swap using CompanionSlot or SmartSlot configurations.
• LED Indicators: Front panel LEDs display individual input states and overall module health.
• Voltage Thresholds: Input ON above 82V AC, OFF below 26V AC, with built-in hysteresis.
• Failure Detection: Identifies open, shorted, and disconnected wiring with flashing red LED alerts.

Technical Specifications

Physical Specifications

Applications

• Interfaces with field devices for industrial automation requiring high fault tolerance.
• Ensures reliable operation in safety-critical systems using 120V AC digital inputs.
• Ideal for SIL 3 certified machinery protection and process control applications.
• Supports real-time monitoring and hot-swappable maintenance without downtime.