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108928_en_02
1.4
Safety notes
Observe the country-specific installation, safety, and accident prevention regulations.
1.4.1
Safety of machines or systems
Draw up and implement
a safety concept
The machine or system manufacturer and the operator are responsible for the safety of the
machine or system and the application in which the machine or system is used. In order to
use the Smart Element described in this document, you must have drawn up an appropriate
safety concept for your machine or system. This includes a hazard and risk analysis in
accordance with the directives and standards specified in Section
Risk assessment, valida
-
tion, and function test
•
Before using the Smart Element, perform risk assessment for the machine or system.
•
Validate your entire safety system.
•
Carry out a new validation every time you make a safety-related modification.
•
Perform a function test on a regular basis.
Achievable safety integrity
Functional safety is guaranteed for the Smart Element as a single component. However, this
does not guarantee functional safety for the entire machine or system. In order to achieve
the desired safety level for the entire machine or system, define the safety requirements for
the machine or system as well as how to implement them from both a technological and
organizational perspective.
1.4.2
Safety when starting applications
Start conditions
Take the following into consideration when determining the start conditions for your machine
or system:
– The machine or system may only be started if it can be ensured that nobody is present
in the danger zone.
– Meet the requirements of EN ISO 13849-1 with regard to the manual reset function.
NOTE: Electrostatic discharge
Electrostatic discharge can damage or destroy components. When handling the device,
observe the necessary safety precautions against electrostatic discharge (ESD) in accor
-
dance with EN 61340-5-1 and IEC 61340-5-1.
NOTE: Damage to contacts or malfunction during mounting or removal when
connected
Before performing work on a Smart Element, disconnect the power to the Smart Element.
This means:
•
Disconnect the connected I/O devices from the power.
•
Switch off the I/O supply voltage U
P
at the backplane in which the Smart Element is
located.
•
Disconnect the communications power supply U
L
at the bus coupler or controller.