12 Rockwell Automation Publication 440G-UM001C-EN-P - June 2019
Chapter 2 Safety Concept
The installed system, including the safety control system and the means by
which the machine stops, must achieve the needed safety performance. The
440G-LZ safety switch is one element in the safety system.
Additional guidance on guards, guard locking and guard interlock can be
found in:
• EN ISO 12100
• EN ISO 13854
• EN ISO 13855
• EN ISO 13857
• EN ISO 14119
• EN ISO TR 24119
• EN ISO 14120
• Application-specific C-level standards
ATTENTION: A risk assessment is required to prove that the selected switch
can be used in the desired application. A functional test of the system is
necessary to validate that it works as expected (see Functional Testing on
page 20).
Guard locking switches that are activated by the Power to Lock principle,
440G-LZS 21 **L* safety switch, must only be used after a risk assessment has
shown that the use of a Power to Release principle, 440G-LZS21**R* safety
switch is inappropriate. This assessment is necessary since the guard can be
immediately opened after a loss of power supply or upon de-activation of the
unlocking signal.
To Next Page
Loading...
