The ABB SM811K01 Safety CPU Module is a high-integrity safety processing unit designed for use in ABB AC 800M controllers within the System 800xA distributed control system (DCS). It functions as a collaborative safety controller that supervises system operations and executes safety-related logic independently of the main processor.
In high-risk industrial environments, the SM811K01 continuously monitors the primary controller—typically the PM865 processor—and triggers protective actions when abnormal conditions occur. This capability is essential for maintaining safe operation in critical processes such as emergency shutdown systems and safety instrumented functions.
The module is designed for SIL3 safety applications and supports redundant configurations, enabling highly reliable fail-safe control. It integrates seamlessly with the ABB CEX bus architecture via the BC810 interconnection unit, forming a dependable safety layer within AC 800M control systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SM811K01 |
| Product ID | 3BSE018173R1 |
| Manufacturer | ABB |
| Module Type | Safety CPU Module |
| Platform Compatibility | AC 800M / System 800xA |
| Safety Integrity Level | SIL3 (IEC 61508) |
| Processor | MPC862P 96 MHz |
| Memory | 32 MB RAM, 4 MB Flash |
| Digital I/O | 3 Safety Digital Inputs / 2 Safety Digital Outputs |
| Communication Interface | CEX Bus via BC810 |
| Input Voltage | 24 V DC ±10% |
| Current Consumption | 160 mA typical (250 mA max) |
| Power Consumption | Approx. 3.8–5 W |
| Isolation | Galvanic isolation between I/O |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | −40°C to +85°C |
| Relative Humidity | 5–95% non-condensing |
| Dimensions (L × W × H) | 127.5 × 59 × 185 mm |
| Weight | 0.6 kg |
The module is typically delivered as a kit including the SM811 safety module, TP868 baseplate, and TK852V10 synchronization cable for redundant system configurations.
Recommended Related Models
These ABB modules are commonly used together with the SM811K01 in safety-critical AC 800M architectures.
| Model | Description |
|---|---|
| PM865K01 | AC 800M Processor Unit |
| BC810 | CEX Bus Interconnection Unit |
| SM810K01 | Safety CPU Module |
| SS823 | Voting Device for Safety Systems |
| CI840A | Communication Interface Module |
These components together create a complete high-integrity automation and safety control platform.
Popular ABB Models
The following ABB automation products are widely used across modern industrial control systems.
| Model | Module Type |
|---|---|
| PM590-ETH | PLC CPU Controller |
| SB822 | Redundant Power Supply Module |
| AI830A | Analog Input Module |
| CI801 | Communication Interface Module |
| PP865A | Industrial Operator Panel |
These modules are widely recognized for reliability and long-term performance in industrial automation infrastructures.
