Technical Overview
The ICS Triplex T8461 provides 40 Triple Modular Redundant (TMR) output channels for safety-critical control systems. This module performs comprehensive automatic diagnostics, including current and voltage measurements on each voted output channel . It also runs self-tests for stuck-on and stuck-off failures every two minutes . Therefore, the ICS Triplex T8461 achieves fault tolerance through its internal TMR architecture, which ensures continuous operation even during single-point hardware faults .
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Output Channels | 40 TMR digital outputs |
| Power Groups | 5 independent groups, 8 outputs each |
| System Supply Voltage | 20 to 32 Vdc |
| Output/Field Voltage Range | 18 to 60 Vdc |
| Continuous Current per Channel | 0.75 A |
| Maximum Current per Power Group | 6 A |
| Turn-On/Off Delay | 0.5 ms |
| SOE Resolution | 1 ms |
| SOE Time-stamp Accuracy | ±0.5 ms |
| Self-Test Interval | 2 minutes |
| Isolation (Impulse Withstand) | 2500 Vdc opto/galvanic |
| Operating Temperature | -5°C to +60°C |
| Dimensions (H x W x D) | 266 x 31 x 303 mm |
| Weight | 1.285 kg |
Protection and Diagnostic Features
The ICS Triplex T8461 includes automatic overcurrent protection per channel, which eliminates the need for external fuses . Additionally, the module provides automatic line monitoring to detect open and short circuit faults in field wiring and loads . The onboard Sequence of Events (SOE) reporting captures output state changes with 1 ms resolution .
Module Architecture and Integration
The ICS Triplex T8461 interfaces with the Inter-Module Bus (IMB) to receive power and communicate with the TMR Processor . All output channels are powered in isolated groups of eight (Power Groups), and the module supports online hot replacement using a dedicated Companion Slot or SmartSlot configuration . It is TÜV Certified for IEC 61508 SIL 3, making it suitable for high-integrity safety applications .
Details
| Weight | 1.285 kg |
|---|---|
| Dimensions | 266 × 31 × 303 mm |
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