The GE 8851-LC-MT is a SafetyNet safety controller used in GE Fanuc industrial automation architectures, designed for safety-critical process control environments. It operates as a core logic and safety execution unit, managing real-time interlocks, emergency shutdown functions, and distributed I/O coordination across industrial systems.
Engineered for high-risk applications, this controller is widely deployed in oil & gas, power generation, and process industries where system availability and functional safety are non-negotiable.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | General Electric (GE Fanuc) |
| Model | 8851-LC-MT |
| Series | SafetyNet / GE 8000 Series |
| Module Type | Safety Controller / Logic Processor |
| Safety Certification | SIL 2 (IEC 61508 compliant) |
| Processor Architecture | 32-bit RISC processor |
| I/O Capacity | Up to 64 I/O modules |
| Communication Interfaces | Dual redundant Ethernet + serial ports |
| Protocol Support | Modbus, Ethernet industrial protocols |
| Event Logging | Up to 8000 events |
| Redundancy | Optional master/standby hot redundancy |
| Hot Swap Support | Yes |
| Power Supply | 12 VDC (via 8913-PS-AC module) |
| Operating Temperature | -40°C to +70°C |
| Hazardous Area Rating | Class 1, Div 2 / Zone 2 compliant |
| Weight | ~3 kg |
The controller is designed to maintain continuous safe operation even under fault conditions, ensuring deterministic shutdown behavior when required.
Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Dimensions (L × W × H) | 232 × 69 × 138 mm |
| Weight | ~1.35 – 3 kg (variant dependent) |
Its compact rack-based design allows dense installation in industrial safety cabinets while maintaining strong thermal and vibration tolerance.
System Role & Functional Behavior
The GE 8851-LC-MT operates as a dedicated safety logic and control execution module:
- Executes safety logic programs (E-Stop, interlocks, permissives)
- Monitors real-time input from distributed I/O modules
- Coordinates safe shutdown sequences in emergency conditions
- Maintains redundant communication paths for fault tolerance
- Supports online configuration and maintenance without shutdown
- Logs system events for diagnostics and traceability
It acts as the decision-making core of Safety Instrumented Systems (SIS) in GE architectures.
Recommended Related Models
For a complete GE SafetyNet or industrial safety system, the following modules are typically paired:
- 8913-PS-AC Power Supply Module
- 8811-IO-DC Digital I/O Modules
- 8810-HI-TX Analog Input Modules (HART-enabled)
- SafetyNet carrier base (8751-CA-NS)
- GE Mark VIe / Mark V control interface modules
Together, they form a layered safety + control + I/O architecture.
Common GE Safety / Control Modules
- GE IS200 series turbine control modules
- DS200 drive and excitation boards
- GE PACSystems PLC CPU modules
- VersaMax distributed I/O systems
- GE Genius I/O communication modules
Each supports different layers of automation, protection, and process control.
