The ICS Triplex T8403 is a Trusted TMR (Triple Modular Redundancy) digital input module designed for high‑integrity safety and control systems. Operating at 24 VDC, it provides fault‑tolerant input processing with advanced diagnostics, ensuring reliable signal acquisition in safety‑critical environments.
Key Features
Model: T8403
System Supply Voltage: 24 VDC
Architecture: Triple Modular Redundancy (TMR) for fault tolerance
Number of Inputs: 40 channels
Independent Power Groups: Multiple groups for isolation and redundancy
Input Voltage Range: 18–60 VDC typical field voltage
Diagnostics: Line monitoring, fault detection, and LED indicators
Isolation: Channel‑to‑channel and channel‑to‑system isolation for safety integrity
Response Time: Sub‑millisecond input detection
Self‑Test Interval: Periodic automatic diagnostics to ensure reliability
Protection: Electronic fault isolation and monitoring
Compliance: IEC 61508 SIL 3 certified
Environmental Ratings
Operating Temperature: –5 °C to +60 °C (23 °F to 140 °F)
Storage Temperature: –25 °C to +70 °C (–13 °F to 158 °F)
Humidity: 5–95% RH, non‑condensing
Altitude: ≤ 5000 m
Electrostatic Discharge Resistance: 4 kV contact, 8 kV air
Electromagnetic Field Resistance: 10 V/m (80–1000 MHz)
Application Scenarios
The T8403 is widely used in oil & gas, petrochemical plants, power generation, and transportation systems. It is ideal for monitoring digital signals from field devices such as switches, sensors, and interlocks in emergency shutdown (ESD), fire & gas detection, and turbine control systems.
FAQ
Q: How many inputs does the T8403 support? A: It provides 40 digital input channels, grouped for redundancy and isolation.
Q: What makes this module fault‑tolerant? A: Its Triple Modular Redundancy (TMR) architecture ensures continuous operation even if one path fails.
Q: Is the module SIL certified? A: Yes, it complies with IEC 61508 SIL 3 safety standards.
