Product Core Brief
- Model: T8451
- Brand: ICS TRIPLEX (now part of Schneider Electric / Triconex)
- Series: Trusted ICS TMR Safety System
- Core Function: 40-channel triple modular redundant digital output module
- Product Type: Digital Output (DO) Module
- Key Specs: 40 DO Channels | TMR Architecture | 24 VDC | 0.75 A/Channel
- Condition: New Original / New Surplus
Key Technical Specifications
- Manufacturer: ICS TRIPLEX
- Model Number: T8451
- Product Type: Digital Output Module (TMR)
- Output Channels: 40 independent channels
- Power Grouping: 8 independent power groups (5 outputs per group)
- System Supply Voltage: 20–32 VDC (nominal 24 VDC)
- Field/Output Voltage Range: 18–60 VDC
- Rated Output Current: 0.75 A per channel (continuous)
- Per-Group Current: 6 A per power group
- Output Short-Circuit Protection: Electronic (latching)
- Channel-to-Channel Crosstalk: >-40 dB
- Response Time: 1 μs
- Channel Update Rate: Every 4 ms
- Software-Selectable Filter: None, 8, 16, 32, 64, 128, 256, 512, 1024 ms
- Bus Protocol: Genius Bus (embedded support)
- Dimensions: 176 mm × 82 mm × 42 mm
- Weight: 0.35 kg
- Operating Temperature: 5 °C to 60 °C
- Storage Temperature: -25 °C to 70 °C
- Operating Humidity: 5–95% RH (non-condensing)
- Self-Test Interval: 2 minutes
- Mounting: ICS TRIPLEX I/O rack (open enclosure — requires cabinet installation)
Product Introduction
ICS TRIPLEX T8451 is a 40-channel triple modular redundant (TMR) digital output module designed for the Trusted ICS safety control system. The module executes digital output functions by running identical programs across three redundant channels and using a majority-vote system to determine the final output state. This architecture delivers fault tolerance — the system continues correct operation even when one channel fails.
The module communicates over the Genius Bus protocol, exchanging I/O data with the Trusted ICS processor. Each channel updates every 4 ms with software-selectable digital filtering (up to 1024 ms). Electronic latching short-circuit protection, independent power group isolation, and built-in diagnostics for stuck-on and stuck-off fault detection make this module suitable for safety instrumented systems (SIS), emergency shutdown (ESD), and fire and gas (F&G) applications in oil and gas, chemical processing, power generation, and metallurgy.
Frequently Asked Questions
Q: Is the T8451 hot-swappable?
A: The Trusted ICS system documentation states that all modules in the system support hot replacement. However, you should verify this against your specific chassis configuration and firmware revision before performing a live swap. Always confirm the redundant channels are healthy before removing any module.
A: The Trusted ICS system documentation states that all modules in the system support hot replacement. However, you should verify this against your specific chassis configuration and firmware revision before performing a live swap. Always confirm the redundant channels are healthy before removing any module.
Q: Will this module work as a direct replacement for my existing T8451?
A: Only if the hardware revision and firmware version match. Photograph the existing module label and record the revision level before removal. Even within the same model number, different revisions may have different power group configurations or firmware dependencies.
A: Only if the hardware revision and firmware version match. Photograph the existing module label and record the revision level before removal. Even within the same model number, different revisions may have different power group configurations or firmware dependencies.
