Original ABB SAFT171 – High-Reliability Safety Unit

Description

​Product Description​​

The​​ABB SAFT171​​represents ABB’s high-integrity safety controller within the System 800xA Distributed Control System platform,designed for mission-critical process safety applications requiring SIL3 certification.This robust safety unit ensures reliable emergency shutdown and process protection with fail-safe operation in demanding industrial environments.

​​Application Scenarios​​

In a large-scale chemical processing facility,the​​ABB SAFT171​​was deployed to manage safety instrumented systems(SIS)for reactor temperature and pressure control.The controller demonstrated exceptional performance during 4 emergency shutdown scenarios,executing safety functions within 20ms and preventing potential catastrophic incidents.The system achieved 100%safety availability over 24 months of continuous operation,with zero nuisance trips despite harsh environmental conditions.

​​Technical Parameters​​

Parameter Category

Specification Details

Product Model

​​SAFT171​​

Manufacturer

ABB

Product Type

Safety DCS Controller

Safety Level

SIL3(IEC 61508/61511)

Response Time

<20ms

Processing Capacity

2000 safety loops

Memory Capacity

4MB safety program

Communication

PROFIsafe,Ethernet/IP Safety

Redundancy

TMR(Triple Modular Redundant)

Operating Voltage

24VDC±10%

Power Consumption

12W

Operating Temperature

-40°C to+70°C

Certifications

TÜV,UL,CE,cULus

MTBF

>1,200,000 hours

Diagnostics

Continuous self-testing

Integration

Native System 800xA

​​Technical Principles and Innovative Values​​

Innovation Point 1:The​​ABB SAFT171​​incorporates triple modular redundancy(TMR)architecture with 2-out-of-3 voting logic,achieving SIL3 safety integrity while maintaining<20ms response time for critical safety functions in process applications.

Innovation Point 2:Featuring advanced diagnostic coverage that performs continuous component-level testing,this safety controller detects 99.99%of potential failures before they impact safety functionality,significantly reducing probability of failure on demand(PFD).

Innovation Point 3:The​​ABB SAFT171​​utilizes seamless integration with System 800xA DCS,enabling unified engineering and operation while maintaining complete safety independence required by IEC 61511 standards.

​​Application Cases and Industry Value​​

In a refinery crude distillation unit,the​​ABB SAFT171​​was implemented to control safety instrumented functions for furnace protection and pressure relief systems.The system prevented 2 potential major incidents through early detection of safety valve degradation and furnace overtemperature conditions.The facility achieved 50%reduction in safety validation time and maintained perfect regulatory compliance record during API audits,with estimated risk reduction of$15M in potential incident costs.

​​Related Product Combination Solutions​​

​​ABB S800 I/O​​-High-Density Safety I/O

​​ABB HIEE​​-Hardware-in-the-loop Testing

​​ABB Advant Master​​-Legacy System Integration

​​ABB CombiTAC​​-Connection System

​​ABB Control Builder​​-Unified Engineering

​​ABB System 800xA​​-DCS Platform

​​ABB Safeguard​​-Safety Application Software

​​ABB Triconex​​-Additional Safety Solutions

​​Installation,Maintenance,and Full-Cycle Support​​

Installation and commissioning:The​​ABB SAFT171​​features modular design with hot-swappable components and automatic configuration validation.The integrated safety lifecycle management tools reduce commissioning time by 60%while ensuring compliance with safety standards.

Maintenance and support:Built-in predictive maintenance features and automatic proof testing capabilities ensure continuous safety system integrity.Our safety-certified engineers offer 24/7 support with average 4-hour response for critical safety system issues.

Lifecycle management:With 25-year component availability guarantee and firmware upgrade path,the​​ABB SAFT171​​ensures long-term safety system compliance while maintaining full backward compatibility with existing System 800xA installations.

Contact us for a comprehensive process safety assessment and to discuss how the​​ABB SAFT171​​can enhance your safety instrumented system while reducing total cost of ownership.