Description
Product Overview
The ICS Triplex T8480 is a triple modular redundant (TMR) analog output module for Rockwell Automation Trusted T8000 SIS platform. It converts digital safety control logic signals into standard 4–20mA analog outputs to drive field control valves, valve positioners and regulating actuators for Emergency Shutdown (ESD), burner management and safety interlock control. Each channel adopts three independent output circuits with 2oo3 hardware voting, so single circuit fault will not lead to loss of safety control function. Widely used in oil & gas, refinery, chemical, power generation and LNG safety control cabinets, paired with dedicated T8850 FTA field termination assembly for field analog wiring termination.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | T8480 |
| Manufacturer | ICS Triplex (Rockwell Automation) |
| Series | Trusted T8000 SIS |
| Product Type | 40 Channel TMR Analog Output Module |
| Output Signal | 0~20mA / 4~20mA configurable analog current output |
| Channel Count | 40 fully triplicated TMR channels, 5 banks × 8 isolated channels |
| Output Accuracy | ±0.1% full scale at 25°C |
| Load Resistance | Max 750Ω per channel |
| 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 T8850 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 architecture, single channel fault does not interrupt safety analog output control.
- 40 high-density triplicated analog output channels grouped into 5 electrically isolated banks of 8 channels, improves fault segregation between different control loops.
- Per-channel continuous diagnostics for open circuit, short circuit, overcurrent and module internal hardware fault detection.
- High precision 4–20mA analog output for control valve positioners and safety modulating actuators, meets high accuracy safety control requirements.
- 2500V galvanic isolation barrier protects SIS backplane from field surge, transient and EMI noise interference.
- Hot-swappable module design; online replacement permitted under approved safety maintenance procedures without full SIS rack shutdown.
- TÜV SIL3 certified for safety instrumented loops, suitable for ESD and modulating safety control applications.
- Seamless communication with Trusted T8000 TMR safety controller via SmartSlot backplane bus; field analog wiring terminates on matched T8850 FTA assembly.
Installation Notes
- Install T8480 module into Trusted T8000 SmartSlot base rack; verify hardware revision and firmware compatibility with existing Trusted CPU.
- Field 4-20mA analog wiring terminates on matched T8850 FTA assembly; separate low-level analog 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 analog output calibration, loop test and safety proof test before returning safety system online.
- Route field actuator wiring strictly following ICS Triplex Trusted safety wiring specifications, limit cable impedance within the allowable load range.
Testing Procedure
- Visual inspection: Inspect module housing, gold edge connector and front LED indicators for scratches, bent pins or corrosion.
- Insert T8480 into Trusted SmartSlot base rack, apply 24VDC rack power and complete power-up self-test.
- Connect precision milliammeter to each AO channel via T8850 FTA terminals.
- Send output setpoints (4mA,12mA,20mA) from Trusted engineering software, verify output current accuracy.
- Simulate wire open and short-circuit faults to verify channel diagnostic alarms activate as expected.
- Validate analog output voting function by injecting single-slice fault and confirm 2oo3 TMR voting maintains correct output.
- Save project backup and diagnostic logs, record calibration and test results and tag module for spare inventory.
FAQ
Q: What is ICS Triplex T8480 used for? A: It is a 40-channel SIL3 TMR analog output module for Trusted T8000 SIS system, outputting 4–20mA signals to safety control valves and positioners.
Q: What safety level certification does T8480 hold? A: TÜV SIL3 certified to IEC61508 / IEC61511.
Q: Is T8480 hot swappable? A: Yes, it supports hot swap on Trusted T8000 SmartSlot rack under approved safety maintenance procedures.
Q: What FTA terminal assembly matches T8480? A: T8850 FTA terminal assembly for 4–20mA analog output field wiring termination.
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