Description
Product Overview
The ICS Triplex T8442 is a triple modular redundant (TMR) speed monitor module for Rockwell Automation Trusted T8000 SIS platform. It acquires pulse signals from magnetic pickups (MPU) to measure rotational speed for steam/gas turbine overspeed protection, critical machinery shaft speed monitoring and anti-crash safety interlock. Each speed input channel adopts three independent measurement circuits with 2oo3 hardware voting to tolerate single circuit fault without losing safety protection function. It is widely used in power generation, oil & gas, refinery and LNG turbomachinery ESD safety cabinets, paired with dedicated T8800 series FTA terminal assembly for field MPU wiring termination.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | T8442 |
| Manufacturer | ICS Triplex (Rockwell Automation) |
| Series | Trusted T8000 SIS |
| Product Type | TMR Speed Monitor Module |
| Input Signal | Pulse signal from magnetic pickup (MPU) |
| Frequency Range | 0.1 Hz ~ 2000 Hz |
| Speed Measuring Range | 0 ~ 6000 RPM |
| Measurement Accuracy | ±0.2% full scale at 25°C |
| Resolution | 0.01% ± 2 counts |
| 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 terminal 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, single channel fault will not interrupt turbine overspeed safety protection function.
- Precision rotational speed measurement, supports magnetic pickup pulse input for gas/steam turbine shaft speed monitoring and overspeed trip protection.
- Continuous onboard diagnostics for pulse signal loss, MPU open/short circuit and module internal hardware fault detection.
- High precision speed measurement, suitable for high-reliability turbomachinery safety protection loops.
- 2500V galvanic isolation barrier protects SIS backplane from field surge, transient and EMI noise interference.
- Hot-swappable module; online replacement permitted under approved safety maintenance procedures without full SIS rack shutdown.
- TÜV SIL3 certified for safety instrumented loops, specifically designed for turbine overspeed protection, one of the most critical SIS applications.
- Seamless communication with Trusted T8000 TMR safety controller via SmartSlot backplane bus; field pulse wiring terminates on matched T8800 FTA assembly.
Installation Notes
- Install T8442 module into Trusted T8000 SmartSlot base rack; verify hardware revision and firmware compatibility with existing Trusted CPU.
- Field magnetic pickup pulse wiring terminates on matched T8800 FTA assembly; separate low-level MPU 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 pulse signal simulation test, overspeed trip logic verification and safety proof test before returning turbine safety system online.
- Route MPU magnetic pickup wiring strictly following ICS Triplex Trusted safety wiring specifications, keep cable length within recommended limit.
Testing Procedure
- Visual inspection: Inspect module housing, gold edge connector and front LED indicators for scratches, bent pins or corrosion.
- Insert T8442 into Trusted SmartSlot base rack, apply 24VDC rack power and complete power-up self-test.
- Connect pulse signal simulator to T8800 FTA terminals to simulate magnetic pickup pulse signal.
- Adjust pulse frequency to simulate different rotational speed, confirm speed reading inside Trusted engineering software.
- Simulate MPU wire break and signal loss faults to verify module diagnostic alarms activate as expected.
- Validate overspeed trip logic and confirm TMR 2oo3 voting function during single channel fault injection.
- Save project backup and diagnostic logs, record speed test and trip test results and tag module for spare inventory.
FAQ
Q: What is ICS Triplex T8442 used for? A: It is a SIL3 TMR speed monitor module for Trusted T8000 SIS system, used for turbine shaft speed measurement and overspeed safety protection, receiving pulse signals from magnetic pickups.
Q: What safety level certification does T8442 hold? A: TÜV SIL3 certified to IEC61508 / IEC61511.
Q: Is T8442 hot swappable? A: Yes, it supports hot swap on Trusted T8000 SmartSlot rack under approved safety maintenance procedures.
Q: What FTA terminal assembly matches T8442? A: T8800 FTA terminal assembly for magnetic pickup pulse signal wiring termination.
Start Chat
Send an Email
