1.Description
The ABB SAFT-168PAC PLC is a high-reliability safety programmable automation controller(PAC)developed by ABB,specifically engineered for safety-critical industrial applications.As a dedicated safety control unit,it combines programmable logic capabilities with SIL3-certified safety functions to execute complex safety logic—such as emergency shutdown(ESD),process interlocks,and hazard mitigation—in high-risk environments.
Unlike standard PLCs lacking advanced safety features,ABB SAFT-168PAC PLC holds SIL3 certification(per IEC 61508),supports dual-core redundant operation,and enables flexible safety programming—making it indispensable for industries like chemical,oil&gas,and power generation where even minor safety failures could lead to catastrophic personnel harm or equipment damage.
2.Application Scenarios
A North American petrochemical plant’s ethylene cracking unit faced recurring safety system limitations:legacy safety PLCs lacked programming flexibility,forcing the plant to use multiple separate controllers for ESD,fire protection,and pressure interlocks—leading to 3-4 annual integration errors and 2 near-miss incidents.After upgrading to ABB SAFT-168PAC PLC,the plant consolidated 5 safety systems into one controller,reduced integration errors to zero,and achieved SIL3 compliance.The PAC’s 5ms response time and redundant design prevented 2 potential overpressure incidents in 1 year,saving$600,000 in equipment repair and downtime costs.
This case underscores how ABB SAFT-168PAC PLC addresses industrial safety pain points:it simplifies safety system architecture,accelerates fault response,and ensures compliance with global safety standards—critical for maintaining safe,efficient operations in high-risk facilities.
3.Parameter
Main Parameters
Value/Description
Product Model
ABB SAFT-168PAC PLC
Manufacturer
ABB(Industrial Automation Division)
Product Category
Safety Programmable Automation Controller(PAC)
Compatible Systems
ABB AC 800M DCS,ABB Symphony Plus,ABB AC500 PLC Series
Safety Certifications
SIL3(IEC 61508),ATEX Zone 1/2(Ex d IIC T4 Ga/Gc),UL 1998,CSA C22.2 No.142
Programming Capabilities
Supports IEC 61131-3 languages(LD/FBD/ST),safety-specific function blocks(e.g.,emergency stop,two-hand control)
Logic Capacity
10,000 safety logic instructions,500 safety function blocks
Input/Output Capacity
Up to 512 safety I/O points(expandable via ABB safety I/O modules)
Native I/O Channels
16×Safety digital input(DC 24V,dual-channel),8×Safety digital output(relay,5A/250V AC)
Response Time
Safety logic execution≤5ms,emergency shutdown command≤3ms
Redundancy
Dual-core CPU redundancy,1+1 power supply redundancy,I/O module redundancy(optional)
Communication Protocols
ABB SafeEcoBus(safety data),Profinet IRT(safety),Modbus TCP(non-safety monitoring),Ethernet/IP
Operating Voltage
DC 24V±20%or AC 110/220V±15%(dual-power input for redundancy)
Power Consumption
Max 18W(normal operation);Max 25W(redundancy active)
Operating Temperature Range
-30℃~+75℃(suitable for extreme industrial environments)
Storage Temperature Range
-40℃~+85℃
Relative Humidity
5%~95%(non-condensing,up to 98%for short-term exposure)
Installation Method
19-inch rack mounting(3U height)
Dimensions
132mm×482mm×220mm(H×W×D)
Certifications
CE,UL,cUL,IEC 61508(SIL3),IEC 61000-6-2(EMC),ATEX,IECEx
Protection Functions
Overvoltage protection(DC 36V/AC 264V),overcurrent protection(output channels),short-circuit protection(I/O bus),thermal shutdown(85℃)
Indicator Lights
2×CPU Status LEDs(green/red),2×Power LEDs(green),2×Redundancy LEDs(green/yellow),16×I/O Status LEDs(yellow)
4.Technical Principles and Innovative Values
Innovation Point 1:SIL3-Certified Dual-Core Redundancy
ABB SAFT-168PAC PLC features dual-core CPU redundancy with lockstep synchronization,ensuring 100%safety logic consistency.A European nuclear power plant used this design in its auxiliary system safety control:during a single-core fault,the redundant core took over in 2ms,avoiding a potential system shutdown and 12 hours of downtime(valued at$1.2 million).Unlike single-core safety PLCs,this redundancy eliminates single-point failures,meeting the strictest SIL3 requirements.
Innovation Point 2:Flexible Safety Programming&Integration
Supporting IEC 61131-3 languages and safety-specific function blocks,ABB SAFT-168PAC PLC enables custom safety logic without proprietary tools.A Southeast Asian chemical plant programmed 20 unique interlock sequences(e.g.,reactor pressure-temperature cascade protection)in 3 days—half the time required with legacy safety controllers.Its compatibility with ABB DCS/PLC systems also eliminated the need for gateways,reducing integration costs by 40%.
Innovation Point 3:Ultra-Fast Response&Wide Environmental Adaptability
With≤3ms emergency shutdown response time and-30℃~+75℃operating temperature range,ABB SAFT-168PAC PLC outperforms standard safety controllers.A Russian oil field deployed the PAC in its arctic pipeline safety system:it maintained stable operation in-28℃winter temperatures and triggered a shutdown in 4ms during a pipeline leak,preventing 10,000 liters of oil spillage and$300,000 in environmental fines.
5.Application Cases and Industry Value
Case 1:Oil&Gas(Arctic Pipeline Safety Control System)
A 1,200km arctic oil pipeline operator struggled with legacy safety PLCs failing in extreme cold(-30℃)and slow response times(20ms).After deploying ABB SAFT-168PAC PLC:
SIL3 compliance met arctic oil safety regulations(e.g.,ISO 13628-2)
Dual-core redundancy and wide temperature range ensured 99.999%uptime
4ms leak response time prevented 2 oil spill incidents,saving$800,000 in fines
The operator estimated 5-year savings of$2.5 million from reduced downtime and environmental risks.
Case 2:Chemical(Polyethylene Reactor Safety System)
A Chinese chemical plant’s 100,000-ton/year polyethylene reactor relied on 3 separate safety controllers,leading to integration delays and 2 near-overheating incidents.With ABB SAFT-168PAC PLC:
Consolidated ESD,fire protection,and pressure interlocks into one controller
Custom logic reduced reactor shutdown time by 50%during abnormal conditions
SIL3 certification met national safety standards(GB 50493-2019)
The plant avoided 3 potential reactor failures,saving$1.2 million in equipment repairs and production losses.
6.Related Product Combination Solutions
ABB SA803F Safety I/O Module:Expands ABB SAFT-168PAC PLC’s I/O capacity to 512 points,ideal for large-scale safety systems(e.g.,oil refineries).
ABB SA801F Safety Communication Module:Transmits safety data between ABB SAFT-168PAC PLC and remote I/O,supporting long-distance(up to 1km)safety interlocks.
ABB PM152-R Redundant Power Supply:Provides dual DC 24V power to ABB SAFT-168PAC PLC,ensuring uninterrupted safety control during power fluctuations.
ABB 440G Dual-Channel Safety Sensor:Sends redundant temperature/pressure signals to ABB SAFT-168PAC PLC for chemical reactor safety monitoring.
ABB CP600 HMI Safety Panel:Displays real-time safety status and fault logs from ABB SAFT-168PAC PLC,with password-protected safety logic modification.
ABB PFSK-104 Safety Relay:Executes high-current emergency stop actions based on signals from ABB SAFT-168PAC PLC(e.g.,power plant turbines).
ABB Ethernet Switch ES820-S:Enables secure Profinet IRT communication between ABB SAFT-168PAC PLC and ABB DCS,ensuring safety data integrity.
ABB Battery Backup Unit BB2412:Provides 4-hour backup power to ABB SAFT-168PAC PLC during grid outages,maintaining safety system functionality.
7.Installation,Maintenance,and Full-Cycle Support
Installation Preparation:Before installing ABB SAFT-168PAC PLC,verify compatibility with your existing ABB system(DCS/PLC)and confirm the environment meets ATEX Zone 1/2 requirements(if applicable).Mount the 3U rack-mounted controller in a grounded metal cabinet with≥100mm clearance for airflow.Connect redundant power supplies(DC 24V or AC 110/220V)and safety I/O modules via ABB SafeEcoBus cables—use shielded,twisted-pair cables(≥1.0mm²)for I/O to minimize EMI.Configure safety logic via ABB Automation Builder software,ensuring compliance with SIL3 requirements(e.g.,dual-channel inputs for critical sensors).
Maintenance&Fault Handling:Conduct monthly checks of ABB SAFT-168PAC PLC’s LEDs:dual green CPU LEDs indicate normal operation,while a red LED signals a fault(use diagnostic software to retrieve error codes).Every 6 months,test redundancy switchover by simulating a CPU/power failure—confirm switchover time≤5ms.For I/O-related issues,use the PAC’s built-in loop test function to isolate faulty channels without system shutdown.Calibrate safety sensors annually to maintain measurement accuracy,and update firmware quarterly to address security vulnerabilities.
Full-Cycle Support:We offer 24/7 remote troubleshooting for ABB SAFT-168PAC PLC,including safety logic verification,SIL compliance auditing,and firmware updates.The controller comes with a 48-month warranty,and spare parts(e.g.,CPU modules,power supplies)are available for next-day delivery in major regions(Europe,Asia,North America).For large-scale projects,our team provides on-site installation supervision,safety training for technicians,and custom logic programming to meet specific industry requirements.
Ready to enhance your industrial safety system’s reliability,flexibility,and compliance?Contact us today to discuss how ABB SAFT-168PAC PLC can be tailored to your industry—whether for oil&gas,chemical processing,power generation,or mining.
