Description
The GE Fanuc 8851-LC-MT is a high-reliability SafetyNet Logic Controller belonging to the PAC8000 automation platform. Engineered explicitly for safety-critical tasks in demanding industrial environments, this controller complies with stringent IEC 61508 standards for SIL 2 applications. It provides high-speed processing, robust hardware diagnostics, and seamless communication capabilities, functioning as a critical hardware layer to protect factory personnel, machinery assets, and process integrity.
Product Specifications
Product Name: 8851-LC-MT SafetyNet Controller
Manufacturer: GE Fanuc / General Electric (PAC8000 Series)
Safety Certification: IEC 61508 Certified for SIL 2 Applications
Input Operating Voltage: 12 V DC (typically sourced from 8913-PS-AC power supply)
Architecture Configuration: 1oo1D with comprehensive internal diagnostics
Max Module Communication: Supports communication with up to 64 I/O modules
Event Logging Capacity: Up to 8000 chronological events for diagnostics
Dimensions: 68 mm x 130 mm x 135 mm
Weight: Approximately 0.95 kg
Country of Origin: USA
GE 8851-LC-MT
GE 8851-LC-MT
GE 8851-LC-MT
Application Areas
The 8851-LC-MT is built for safety-instrumented systems (SIS) and critical control loops across diverse industrial infrastructure. Primary deployment fields include:
- Emergency Shutdown Systems (ESD) in oil refineries and petrochemical facilities
- Burner Management Systems (BMS) for industrial boilers and furnaces
- Fire and Gas (F&G) detection monitoring networks
- Critical process control loops in chemical processing plants
- High-pressure pipeline monitoring and valve safety interlocks
Product Operation Instructions
- Carrier Mounting: Ensure that the power distribution system is disabled before hardware handling. Securely mount the 8851-LC-MT controller into its designated slot on a compatible module carrier, such as the ELFD Controller Carrier or 8751-CA-NS base.
- Network Connectivity: Connect the dual-redundant high-speed Ethernet lines to the fiber optic LC interfaces. This dual configuration guarantees network fault tolerance and bumpless transfer options during active processing.
- System Synchronization: For high-availability architectures, pair the module with a second identical backup controller on the carrier framework. Use the hardware “Change State” buttons on the carrier to manage online master/standby synchronization states manually if required.
- Program Loading and Maintenance: Use the PAC8000 Workbench software to load certified IEC 61131-3 logic programs via the communication bus. The module supports hot-swapping and online re-configuration, enabling maintenance without stopping process safety mechanisms, even in Class 1, Division 2 hazard zones.
Frequently Asked Questions (Q&A)
Q: What is the primary safety rating of the GE 8851-LC-MT?
A: The controller is specifically verified and certified according to the IEC 61508 standard for use within SIL 2 (Safety Integrity Level 2) industrial automation applications.
Q: How does the 8851-LC-MT protect against network failures?
A: The hardware design features a dual-redundant, fault-tolerant Ethernet LAN structure that supports uninterrupted, bumpless transmission in the event of a network cable or port failure.
Q: Can this safety controller communicate with non-safety plant systems?
A: Yes, it establishes high-speed peer-to-peer communication with standard controllers and can write output variables to non-safety standard modules without compromising its core safety functions.
Q: What diagnostic capabilities are built into the module?
A: It utilizes a 1oo1D safe architecture backed by extensive internal diagnostic loops. It also logs up to 8000 sequence-of-events parameters directly into its memory for breakdown analysis.
Q: Can I replace a faulty 8851-LC-MT while the system is running?
A: Yes, the controller is fully live-maintainable and hot-swappable during operation, even when deployed in hazardous field locations categorized under Class 1, Division 2 or Zone 2.
