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Drive-based functional safety

Safer machines and processes with ABB's LV AC drives

ABB drives offer functional safety solutions together with a wide range of safety devices for smart machine design. Our LV AC drives have safe torque off (STO) built-in as a standard or offers it as an optional safety function. STO in our drives together with additional safety functions enhance application safety. ABB’s functional safety design tool helps safety designers achieve the required safety solution for their machines. Our drive-based functional safety offering complies with the requirements of international standards and requirements, including European Union Machinery Directive 2006/42/EC.

 

Drive type Integrated STO SS1 SBC SLS SSE SMS  SDI 3)  SSM 4)
Industrial drives ACS880 SIL 3/PL e
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  ●   ●
ACS800 SIL 2/PL d 
● ●
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● ●
● ● 1)
● ● 2)
   -   -
Machinery drives ACS355 SIL 3/PL e
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○
○
○
○
 ○  ○
ACS850 SIL 3/PL e
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○
○
○
○
 ○  ○
  ACS380 SIL 3/PL e       ○       ○       ○       ○   ○  ○  ○
  ACS880 SIL 3/PL e       ●       ●      ●       ●   ●  ●  ●
Industry-specific drives ACQ810 SIL 3/PL e
○
○
○
○
○
 ○  ○
  ACH580  SIL 3/PL e     ○     ○     ○     ○     ○   ○   ○ 
General purpose drives ACS580 SIL 3/PL e
○
○
○
○
○
 ○  ○
Motion control drives ACSM1 SIL 3/PL e
○
○
○
○
○
 ○  ○
MicroFlex e190 SIL 3/PL e
○
○
○
○
○
 ○  ○
  MotiFlex e180   SIL 3/PL e     ○
     ○     ○     ○    ○  ○  ○


● Available as an integrated drive option.
●● Available as an option for cabinet-built drives (+QXXX).
○ Safety functions are possible, with external safety devices connected to the STO in the drive.
1) SSE is implemented as category 1 stop function.
2) SMS is implemented as a variant of SLS.
3) SDI is available only with FSO-21
4) SSM is available only with FSO-21

You can also build safety functions to the drives without safe torque off (STO), by using external safety devices such as contactors/circuit breakers and safety relays.  

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Safety devices and support tools

Drive-based functional safety

The more you can integrate safety functionality into the machine’s safety system, the more savings it will bring you. Our scalable portfolio of drives connect smoothly to ABB's safety PLC and other safety devices for optimal safety solutions.
Functional safety design tool (FSDT-01)

The Functional safety design tool helps you perform risk assessments, establish safety integrity level (SIL) / performance level (PL) for safety functions and generate design reports.

Safety functions module

The plug-in FSO-12 and -21 for ACS880 industrial and machinery drives, offering safety functions SS1, SSE, SLS, SBC, SMS, SDI, SSM and prevention of unexpected start up. The module works encoderlessly and is TÜV certified for safety systems up to SIL3/PL e.
Typical safety functions

More information regarding safe torque off (STO), safe stop 1 (SS1), safe stop emergency (SSE), safely-limited speed (SLS), safe maximum speed (SMS) and safe brake control (SBC) here.

Safety related articles

Drive-based functional safety solutions
Safety-conscious drives meet safety standards

In the last decade, updated safety standards have made it possible for electronic
safety functions to be built directly into drives which control motor and machinery
movements in industrial processes. Mikko Ristolainen explains how this approach
simplifies things for designers and machine builders.
Cost and time savings with drive-based functional safety

ABB’s functional safety devices, together with ACS880 industrial drives, create state-of-the-art solutions to keep people and property safe.
Integration with automation systems is quick and reliable using PROFIsafe connectivity, while designing a safety system is easy with ABB’s functional safety design tool.
Technical descriptions for enhanced safety

Our drive-based functional safety technical descriptions present how specific safety functions can be designed using ABB safety components including LV AC drives.

Drives deliver safety for food and beverage machinery

Variable speed drives (VSDs) have successfully replaced many traditional techniques for controlling the machinery used throughout the food and beverage sector. In addition to precise process control and significantly improved energy efficiency, drives also help machinery manufactures meet the required safety standards and reduce system complexity.

Related products

ABB Jokab safety products

offers a wide range of safety products that work together with our drives
AC500-S safety PLC

easy to connect to our drives
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