ABB SM811K01 (3BSE018173R1) SIL3 High Integrity Safety CPU

Product Description

SM811K01 (material code 3BSE018173R1) is a TÜV SIL3 certified dedicated safety processor developed by ABB for AC800M High Integrity safety control platform, matched and operated 

collaboratively with PM865 main controller to build 1oo2D diverse redundant safety architectureABB Group.

It is connected to the CEX extended bus through BC810 bus interconnection unit, paired with TK852V10 synchronization cable for cross-CPU logic synchronous operation. The module independently 

undertakes safety interlock algorithm operation, emergency shutdown (ESD) protection, process trip logic judgment and safety loop fault voting tasks, jointly executing safety application programs with 

PM865 to eliminate single-point failure risks of safety systems.

The complete set kit includes SM811 safety main module, TP868 mounting baseplate and TK852V10 synchronization link cable. It supports online hot-swap replacement, PCB with three-proof conformal 

coating, standard DIN rail installation. As a core spare part for SIS safety instrumented systems, it is widely used in thermal power units, petrochemical refineries, gas plants and other high-risk process 

industries to realize burner management, overpressure protection, fire & gas emergency interlock control.

Important Note: This model is a legacy spare part for equipment put on the market before July 22, 2017, not compliant with RoHS 2.0 standard; new projects are recommended to use upgraded SM812K01 

insteadABB Group.

Technical Specifications

Model: SM811K01, ABB Article No.: 3BSE018173R1

Brand: ABB, Origin: Sweden

Matching Controller: Exclusive collaborative operation with AC800M PM865 CPU

Safety Certification: TÜV IEC 61508 SIL3 full certification

Processor: MPC862P 96MHz industrial safety-grade chip

Onboard Memory: 32MB RAM for safety logic program storage

System Bus: Connected via BC810 through CEX-Bus, TK852V10 cable for CPU synchronization

Power Supply: 24VDC DC power supply, working range 19.2~30VDC

Power Consumption: Typical 3.8W, operating current 160mA

Hot Swap: Support non-stop online hot plug replacement

Operating Temperature: +5℃ ~ +55℃ continuous full-load operation

Storage Temperature: -40℃ ~ +70℃

Ambient Humidity: 5%–95% non-condensing environment, anti-corrosion coated circuit board

Protection Class: IP20, only installed inside sealed control cabinet

Overall Dimension: 59mm(W) × 186mm(H) × 127.5mm(D)

Net Weight: Approx. 0.7kg

Certifications: CE, UL, TÜV SIL3, IEC 61511 process safety standard

Key Features

1oo2D diverse redundant safety architecture, dual-CPU cross-check voting mechanism, meet strict SIL3 safety integrity level requirements for petrochemical ESD emergency shutdown systems.

Dedicated safety logic execution core, independent safety task scheduling and hardware-level fault self-diagnosis, automatically lock safety output and trigger trip protection once internal abnormality occurs.

Precise synchronization with PM865 main controller via dedicated sync cable, zero logic deviation during redundant master-slave switching, ensure safety action consistency.

CEX bus segmented access via BC810 module, realize bus fault isolation, avoid single branch communication failure causing overall safety system paralysis.

Full online maintainability, faulty safety CPU can be replaced without shutting down the whole DCS/SIS system, minimize production outage loss for continuous process industries.

Strict safety programming constraint mechanism, only SIL-certified function blocks allowed for safety program compilation, prevent misconfiguration leading to safety loop failure.

Rugged industrial hardware design, wide temperature adaptability and strong EMC anti-interference performance, stable long-term operation in power plant and chemical plant strong electromagnetic

 interference environment.

Mature legacy safety spare part, perfectly compatible with old-version 800xA AC800M high-integrity racks, used for system overhaul, spare backup and safety loop risk reduction upgrade.