Description
ICS Triplex / Rockwell Automation T8151B Trusted Communications Interface Module
Continuing the safety system hardware sequence, T8151B specifies the Trusted Communications Interface (CI) module manufactured by ICS Triplex (part of Rockwell Automation) for the Trusted Triple Modular Redundancy (TMR) safety-related control system.
Key Specifications & Overview
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Manufacturer: ICS Triplex (Rockwell Automation)
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Product Type: Trusted Communications Interface (CI) Module
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System Compatibility: Trusted TMR Safety Instrumented System (SIS)
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Primary Function: Acts as an intelligent gateway/interface between the TMR processor core, engineering workstations, supervisory DCS/SCADA networks, and third-party systems. It offloads communication tasks to minimize processing load on the main safety processors.
Communication Ports & Protocols
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Ethernet Ports: 2x 10/100Base-T Ethernet ports supporting open protocols.
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Serial Ports: 4x rear serial ports ( configurable as RS-232, RS-422, or RS-485) plus 1x front-panel diagnostic serial port.
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Supported Protocols:
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Modbus RTU (Slave / optional Master)
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Open Modbus TCP
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Trusted Peer-to-Peer and Enhanced Peer-to-Peer
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Specialized legacy protocols (e.g., ICS2000, CP2000)
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Sequence of Events (SOE): Built-in buffer supporting high-resolution logging (up to 4,000 events) over Modbus.
Physical & Environmental Characteristics
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Backplane Supply Voltage: 20 VDC to 32 VDC (dual redundant feed)
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Power Dissipation: ~10 W max
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Isolation: 250 V electrical isolation across communication and Ethernet ports for robust noise immunity in heavy industrial spaces.
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Operating Temperature: 0°C to +60°C
Applications
Used extensively in high-integrity, SIL 3-rated safety applications across high-risk process industries—such as oil & gas extraction, refining, and chemical processing—to safely route plant data out of emergency shutdown (ESD) and critical control environments without threatening core loop integrity.
T8151B
Product Overview
T8151B is the Trusted Communications Interface Module manufactured by ICS Triplex (Rockwell Automation), designed for the Trusted TMR Fault-Tolerant Safety Instrumented System.
It serves as a high-performance communication gateway between Trusted main processors, I/O racks, engineering stations and external DCS/SCADA systems. Equipped with dual Ethernet and multiple isolated serial ports, it undertakes data forwarding, protocol conversion and high-resolution SOE event transmission. The module adopts TMR triple redundant architecture and is certified for SIL3 safety applications including turbine protection, ESD emergency shutdown and burner management systems.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | T8151B |
| Module Type | Trusted Communications Interface Module |
| Manufacturer | ICS Triplex, Rockwell Automation |
| Applicable Platform | ICS Triplex Trusted TMR Safety Rack System |
| Architecture | Triple Modular Redundancy (TMR) |
| Communication Ports | 2 × 10/100Base-T Ethernet ports
4 × configurable isolated serial ports (RS232 / RS422 / RS485) 1 front diagnostic serial port |
| Supported Protocols | Modbus TCP, Modbus RTU, Trusted Peer-to-Peer, SOE time-stamped event transmission |
| SOE Buffer Capacity | 4000 event records |
| Control Power | 20–32 VDC, typical power consumption 10 W |
| Internal Bus | Trusted proprietary safety backplane bus |
| Hot Swap | Supported under certified rack configuration |
| Operating Temperature | 0 ℃ ~ +60 ℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Protection Class | IP20 (cabinet installation) |
| Safety Certification | IEC 61508 SIL3, IEC 61511, CE |
| Front Panel Indicators | PASS, FAULT, LINK, communication status LEDs |
| Engineering Software | Trusted Toolset |
| Spare Part Status | OEM production discontinued; surplus new & refurbished modules available |
Key Features
- Dual redundant Ethernet network interfaces support network fault-tolerant switching to avoid communication interruption
- Galvanic isolation on serial communication channels suppresses ground loop interference in heavy industrial environments
- Built-in high-precision time synchronization for millisecond-level SOE power system fault sequence analysis
- Local data buffering ensures continuous data transmission when upper communication is temporarily interrupted
- Comprehensive continuous self-diagnosis, monitoring hardware status, memory and communication link health
- Standard single-slot plug-in form factor with mechanical keying to prevent mismatched module installation
- Exclusive for Trusted platform; cannot be directly interchanged with T8151C upgraded version without project re-commissioning
- Supports simultaneous connection to multiple independent host monitoring systems
