8 STO (safe torque off)
8
STO (safe torque off)
The purpose of this chapter is to ensure the safe use of the STO (safe torque off) safety
function that is integrated in the servo drive.
This documentation refers to the following versions:
l
SmartServo BL 4100-C with the STO function, revision 1.0 or higher
l
Metronix ServoCommander
®
parameterisation program version 5.0.0.1.1 or higher.
8.1
Special safety instructions
Dangerous electrical voltage!
Always follow the safety instructions for electric drives and control systems in section 2
Hazards due to the loss of the safety function
If you do not comply with the specified ambient and connection conditions, the safety
function will be lost. This may lead to injuries in the worst case.
Always comply with the specified ambient and connection conditions. This applies
particularly to the input voltage tolerances. See section 12.11
8.2
Certification/safety level
The BL 4100-C servo drive with an integrated safety function is a safety device in
accordance with the EC Machinery Directive 2006/42/EC and it bears the CE mark.
Information about the product-relevant EC Directives can be found in the declaration of
conformity in section 15.2
CE conformity in accordance with the Machinery Directive
The achievable safety level depends on the other components that are used to implement
a safety function. This has been certified by an independent testing authority.
See also the cULus test certificate (scan of the original document) in section 15.3
Product manual BL 4000-C
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