Description
Product Overview
The ICS Triplex T8403 is a triple modular redundant (TMR) digital input module for Rockwell Automation Trusted T8000 SIS platform. It acquires 24VDC discrete signals from field limit switches, pressure switches, fire and gas detectors for Emergency Shutdown (ESD), Burner Management (BMS) and Fire & Gas (F&G) safety systems. Each channel features three independent measurement circuits with 2oo3 hardware voting to tolerate single channel faults without interrupting safety function. Built-in 1ms SOE high precision time stamping supports incident investigation and sequence analysis. Widely deployed in oil & gas, refinery, chemical, power generation and LNG safety interlock cabinets. This module works paired with T8800 FTA terminal assembly.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | T8403 |
| Manufacturer | ICS Triplex (Rockwell Automation) |
| Series | Trusted T8000 SIS |
| Product Type | 40 Channel TMR Digital Input Module |
| Field Input | 24 VDC discrete contact input |
| Input Voltage Range | -6VDC ~ +36VDC, nominal 24VDC |
| Channel Count | 40 fully triplicated TMR channels, divided into 5 banks × 8 channels |
| Per-channel Current | 2mA typical for line diagnostics |
| SOE Timestamp Resolution | 1 ms |
| Galvanic Isolation | 2500V impulse withstand between field and backplane |
| Backplane Power | 20~32VDC, nominal 24VDC redundant rack supply |
| Safety Certification | TÜV SIL3 (IEC61508 / IEC61511), UL/cUL, CE |
| Architecture | True TMR triple modular redundancy, 2oo3 hardware voting |
| Form Factor | Trusted SmartSlot plug-in module, mates with T8800 FTA base assembly |
| Operating Temp | -20°C ~ +60°C |
| Storage Temp | -40°C ~ +85°C |
| Humidity | 5–95% non-condensing |
| Enclosure Rating | IP20 (cabinet installation only) |
| Configuration Software | Trusted Engineering Toolset |
| Hot Swap | Yes |
Key Features
- True TMR triple modular redundant design, 2oo3 hardware voting masks single channel fault while maintaining safety function.
- 40 high-density triplicated 24VDC discrete input channels, grouped into 5 isolated banks of 8 channels for improved fault segregation.
- Per-channel continuous line diagnostics for wire break and short-circuit detection; 2mA loop current for contact health monitoring.
- On-board 1ms SOE timestamp recording for safety event sequence logging and post-incident root cause analysis.
- 2500V galvanic isolation barrier protects SIS backplane from field surge and EMI noise.
- Hot-swappable module; online replacement permitted under approved safety maintenance procedures without rack shutdown.
- TÜV SIL3 certified for safety instrumented loops, suitable for ESD, F&G and burner management safety applications.
- Seamless communication with Trusted T8000 TMR safety controller via SmartSlot backplane bus; paired with T8800 FTA terminal assembly for field wiring termination.
Installation Notes
- Install T8403 module into Trusted T8000 SmartSlot base rack; verify hardware revision and firmware compatibility with existing Trusted CPU.
- Field wiring terminates on matched T8800 FTA assembly; separate discrete signal cables from high-power AC wiring to reduce EMI interference.
- Wear ESD wrist strap during module handling to avoid electrostatic damage to safety electronics.
- Follow plant lockout/tagout procedures even during hot-swap maintenance on SIS safety rack.
- Backup the Trusted safety project database before module replacement.
- After installation, execute full channel loop test and safety proof test before returning safety system online.
- Route field contact wiring strictly following ICS Triplex Trusted safety wiring specifications.
Testing Procedure
- Visual inspection: Inspect module housing, gold edge connector and front LED indicators for scratches, bent pins or corrosion.
- Insert T8403 into Trusted SmartSlot base rack, apply 24VDC rack power and complete power-up self-test.
- Connect 24VDC signal simulator or dry contact switch to each input channel via T8800 FTA terminals.
- Toggle each channel on/off state and confirm correct signal reading inside Trusted engineering software.
- Simulate wire break and short-circuit faults to verify channel diagnostic alarms activate as expected.
- Validate SOE timestamp accuracy and confirm TMR 2oo3 voting function during single channel fault injection.
- Save project backup and diagnostic logs, record channel test results and tag module for spare inventory.
FAQ
Q: What is ICS Triplex T8403 used for? A: It is a 40-channel SIL3 TMR digital input module for Trusted T8000 SIS system, collecting 24VDC discrete safety contact signals for ESD, F&G and burner management safety interlock.
Q: What safety level certification does T8403 hold? A: TÜV SIL3 certified to IEC61508 / IEC61511.
Q: Is T8403 hot swappable? A: Yes, it supports hot swap on Trusted T8000 SmartSlot rack under approved safety maintenance procedures.
Q: What FTA terminal assembly matches T8403? A: T8800 FTA terminal assembly for field contact wiring termination.
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