ICS TRIPLEX T8111C is the core triple modular redundant (TMR) main processor module for Rockwell Automation Trusted Safety Instrumented System (SIS). Adopting a hardware-implemented fault-tolerant (HIFT) lockstep architecture, it features synchronous computing of three processor channels and 2-out-of-3 voting output, supports bumpless hot standby switching and online hot replacement without program reloading. It is specially designed for critical control applications requiring high safety levels in oil & gas, petrochemical, nuclear power and other industries.
This module supports IEC 61131‑3 programming and integrates functions such as fault diagnosis, time-stamped event logging and IRIG‑B time synchronization. It is certified to IEC 61508 SIL 3. The coated version enhances adaptability to harsh environments, making it suitable for severe industrial conditions including high humidity, high salt spray and dust, effectively extending service life and operational reliability. It serves as the core computing unit for safety control in high-risk processes.
Key Features
- Safety & Redundant Architecture
- Triple Modular Redundancy (TMR 3‑2‑0) for fault‑tolerant operation; single‑channel faults do not affect control, and dual‑channel faults trigger safe shutdown.
- Hardware Implemented Fault Tolerance (HIFT) architecture enables ultra‑fast fault detection and response with bumpless automatic handling.
- Time‑stamped fault history for easy troubleshooting and maintenance traceability.
- Certified to IEC 61508 SIL 3, complying with Safety Instrumented Function (SIF) requirements.
- Ease of Operation & Maintenance
- Supports hot swapping / hot replacement without system shutdown or program reloading.
- Bumpless switchover between primary and standby processors with online synchronization, ensuring uninterrupted control.
- Front‑panel LEDs clearly indicate health, primary/standby status, operation and fault conditions.
- Front‑panel RS232 diagnostic port for convenient commissioning, configuration and programming.
- Communication & Time Synchronization
- Front‑panel RS232 diagnostic port; rear 2‑channel RS422/485 and 1‑channel RS485 serial ports.
- Supports IRIG‑B002 / B122 time synchronization for accurate SOE time stamping.
- Supports Modbus RTU protocol for easy integration with HMIs and third‑party systems.
- Inter‑module communication bus speed up to 150 Mbaud.
- Advantages of Coated Version
- Full conformal coating on circuit boards for all‑round protection.
- Resistant to high humidity, salt spray, corrosive gases and dust.
- Reduces maintenance frequency and improves long‑term operational stability.
- Suitable for offshore platforms, coastal petrochemical plants, desert facilities and similar environments.
- Programming & Configuration
- Supports the full range of IEC 61131‑3 programming languages.
- System configuration via System.INI and the Trusted toolset.
- Supports password‑based authority management to prevent unauthorized downloads and operations.
- Supports scan time estimation and performance optimization configuration.
Technical Specifications
| Item | Specification |
|---|---|
| Power Supply | Backplane 20–32 Vdc, dual redundant 24 Vdc |
| Power Consumption | 30 W |
| Safety Level | IEC 61508 SIL 3 |
| Architecture | TMR, lockstep synchronization, HIFT |
| Serial Ports | 1×RS232(front);2×RS422/485;1×RS485 |
| Time Sync. | IRIG‑B002, IRIG‑B122 |
| Relays | 2 dry contacts(Fault/Fail),0.5A@24Vdc |
| Application Capacity | Max.960 KB |
| SOE Buffer | 1000 events |
| Operating Temp. | 0–60℃ |
| Storage Temp. | -25–70℃ |
| Humidity | 10%–95% non-condensing |
| Isolation | Enhanced insulation 50V |
| Dimensions | 40×30×16 cm |
| Weight | 1.93 kg |
| Version | T8111C(coated anti-corrosion) |
Typical Applications
- Oil & Gas Production: Wellhead shutdown, fire & gas system, emergency shutdown (ESD)
- Refining / Petrochemical: Safety control for reactors, furnaces and compressors
- Power / Nuclear Power: Safety interlock for key auxiliary equipment, auxiliary power supply protection
- Offshore Platforms: Main control for SIS systems in FPSO and platform processes
- Chemical Industry: Safety control for high-risk reactions and toxic/hazardous media
FAQ
Q1: What is the difference between T8111C, T8111 and T8110B?A1: T8111C is based on T8111 with added conformal coating for better environmental resistance.T8111 is standard industrial grade; T8110B is an older basic model with lower specifications and capacity.T8111C is software and hardware compatible with T8111 and can be used for direct replacement and upgrade.
Q2: Does hot replacement require system shutdown or program reloading?A2: No. T8111C supports online hot swapping. After removing the faulty module and inserting a new one, synchronization is automatic, with no system shutdown or application program reloading required.
Q3: How do primary and standby processors switch, and will it cause output disturbance?A3: When dual processors are configured, a fault in the primary module will trigger automatic bumpless switchover to the standby unit. Switchover can also be triggered manually by withdrawing the primary module ejector. Output remains in a safe state during switching, with no disturbance or tripping.
Q4: How to identify module faults?A4: Flashing red Healthy LED on the front panel indicates slice fault; flashing red System Healthy indicates system fault. The Fault relay de-energizes to output an alarm. Detailed fault codes can be viewed via the diagnostic port.
Q5: Does it support integration with third-party systems?A5: Yes. The rear serial ports can be configured as Modbus RTU slaves for direct communication with DCS, PLC and SCADA systems. IRIG‑B time synchronization facilitates unified plant-wide clocking.
Q6: What environments are suitable for the coated version?A6: Suitable for high humidity, high salt spray, coastal, offshore, high dust and corrosive gas environments. Standard versions are prone to corrosion and leakage, while the coated version significantly improves service life and MTBF.
Q7: How to set the maximum scan time?A7: It is recommended to set it to approximately 4 times the actual scan time. The default maximum is 1000 ms. If the threshold is exceeded, the system enters a safe state to prevent control failure due to timeout.
Installation & Maintenance Notes
- Take proper ESD precautions before installation; do not touch pins and inspect for physical damage.
- Insert the module into the slot and secure the ejector latch; power-on self-test is complete when front-panel LEDs illuminate.
- Primary/standby configuration: By default, slot 0 of chassis 1 acts as the master controller, with the standby slot synchronizing automatically.
- Maintenance must be performed by qualified personnel; hot swapping is permitted only in non-hazardous areas.
- Record fault codes before performing fault reset, then press the reset button to avoid losing historical fault data.
- Do not grind or scratch the coating on the coated version, as this may damage its protective properties.
Ordering & Complementary Information
Model: ICS TRIPLEX T8111C (Trusted TMR Processor, coated version)Accessory: T8120 Interface Adapter (for IRIG‑B and serial port 引出)Compatibility: Trusted T8100 Chassis, T8151 Communication Module, full range of TMR I/O modules
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