Description
1. Basic Information
| Item | Content |
|---|---|
| Model | T8151B |
| Series | Trusted T8000 TMR Triple‑Redundant Safety Control System |
| Product Type | TMR Communications Interface Module (TCI) |
| Safety Certification | IEC61508 SIL3, TÜV certified, 2‑out‑of‑3 voting architecture |
| Installation | Slot‑mount in dedicated Trusted chassis, hot‑swap supported |
| Manufacturer | ICS‑Triplex (Rockwell Automation) |
2. Hardware Specifications
-
Power Supply
‑ Backplane power supply: 20‑32 VDC (nominal 24 VDC), dual redundant backplane power; power consumption approx. 25‑30 W
-
Processor & Memory
‑ Independent 32‑bit PowerPC co‑processor with TMR triple‑modular redundant hardware voting;
‑ SDRAM: 512 MB; Flash for firmware storage; local data cache to reduce communication load on main CPU.
-
Communication Interfaces
‑ 2‑port 10/100 Mbps auto‑negotiation RJ45 Ethernet, dual‑network redundancy available;
‑ 4 channels of isolated programmable serial ports: RS232 / RS422 / RS485;
‑ Front‑panel debug diagnostic serial port; backplane TMR bus connects to processor modules T8110C / T8111C.
-
Supported Protocols
Modbus TCP (Master/Slave), Modbus RTU (Master/Slave), SOE sequence‑of‑event upload, Trusted peer‑to‑peer protocol. Connects to engineering workstations, HMI, DCS and third‑party PLCs.
-
Environmental Conditions
‑ Operating temperature: ‑40℃ ~ +70℃;
‑ IP20 (inside cabinet); electrically isolated channels with surge protection; relative humidity 5‑95% non‑condensing.
3. Key Functions
- TMR Triple‑Modular Redundancy Communication Voting: Hardware voting for three communication channels. Single‑channel communication faults are isolated automatically. Hot‑swap module replacement without disturbing safety logic operation.
- Offload Communication Workload from Main CPU: Independent co‑processor handles all external data exchange. Network disturbance and communication storm will not impact safety interlock execution.
- Multi‑protocol Data Forwarding: Enables bidirectional data exchange between SIS and DCS, HMI and third‑party control systems. Supports SOE event upload via Modbus.
- Parallel Multi‑module Deployment: Up to 4 pieces of T8151B can be configured in one chassis to expand external connection capacity.
- Hardware Self‑diagnosis: Real‑time diagnosis for communication links and interface status. Front‑panel LED indicators (Run, Fault, communication status). Timestamped fault logging.
- On‑line Configuration: Communication parameters can be modified online without system shutdown or reboot.
4. Typical Applications
‑ SIS safety instrumented system external communication for boiler and turbine in power plants
‑ Safety control systems for offshore oil‑gas platforms
‑ Scenarios requiring SIL3‑rated safety system for external network and serial‑port data interaction
5. Important Notes
- Firmware version must match T8110C / T8111C processors and all system modules. Mismatched firmware will cause communication abnormality. Verify firmware build number when replacing spares.
- T8151B is a communication‑only interface module. It cannot replace CPU processor module and must work with Trusted series processors.
- Serial and Ethernet ports feature electrical isolation. Additional network isolation devices are still recommended for external networks.
- Compatible only with dedicated Trusted chassis; not applicable for standard PLC racks.
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