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Functional Safety

Safer machines with integrated safety

 

What is functional safety? 

Functional Safety entails the detection of a potentially dangerous condition resulting in the activation of a protective or corrective device or mechanism to prevent hazardous events arising or providing mitigation to reduce the consequence of the hazardous event.

In the design of a machine, a risk assessment must be performed and then updated regularly. As far as possible, the machine should be designed to be inherently safe, so that hazards are eliminated from the basic design. However, in most cases some risks remain at an unacceptable level and must be actively reduced using suitable control measures.

Why integrated safety? 

The integration of motion safety functions in the drive supports a decentralized approach to the machine's functional safety that brings many benefits

  •  Reduced complexity and therefore design time
  •  Reduced wiring and consequential costs
  •  Ease of commissioning
  •  Speed of actuation due to close-coupling of safety function and drive

Functional-Safety-Conventional-Integrated-Approach-Diagrams

 
 

All Unidrive and Digitax drives offer onboard STO as standard. 

The MiS210 and MiS250 safety option modules extend the built-in STO with the ability to safely monitor and/or restrict the scope of motion.

 




 
Safety Option Module  Unidrive M700  Digitax HD 
Unidrive-M-Safety Digitax-HD-Safety

CIP-Functional-Safety-IconTUV-Certified-IconEthercat-Safety

MiS210
MiS250
Order No. 82400000021100 Order No. 82700000021500
Safe I/O


 
STO Integration "blade" connector wired
Safe Input Pairs 4
Safe Outputs 2 1(+1 used for STO)
Pulse Outputs 2 2
Encoders

Local Encoders

2
Encoder PSU 1
Encoder external PSU Monitoring 1
Network Safety Safety over EtherCAT (FSoE) with SI-EtherCAT on M753
CIP Safety on M700/M702 on M750
Motion Safety
Functions (instances)
Safe Stop 1 1 1
Safe Stop 2 1
Safe Operating Stop 4 4
Safe Brake Control 1 1
Safely Limited Speed 4 4
Safe Speed Monitor 4 4
Safely Limited Acceleration 4 4
Safe Direction  2 2
Safely Limited Position 4 4
Safe Datum  1 1
Safe Value Transfer Position, Speed  Position, Speed
Safe Two-Handed Control 1
Safe Emergency Stop 1
 
 

 


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