Efficient Networks Siemens Sinamics S120 - Manual (Page 300)

Safety Integrated basic functions
9.1 General information
Drive Functions
300
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
● EN 954-1
Safety-related parts of control systems
● EN 1050
Risk assessment
● IEC 60204-1
Safety of machinery - Electrical equipment of machines - Part 1: General
Requirements for the electrical equipment of machines
● IEC 61508
Functional reliability of electrical and electronic systems
This standard defines "safety integrity levels" (SIL), which not only describe a certain
degree of integrity with regard to safety-oriented software but also defined, quantitative
error probability ranges with regard to the hardware.
Note
In conjunction with certified components, the safety functions of the SINAMICS S120
drive system fulfill the following requirements:
•
Category 3 to EN 954-1.
• Safety integrity level 2 (SIL 2) to IEC 61508.
A list of certified components is available on request from your local Siemens office.
Note
When operated in proper condition and in dry operating areas, SINAMICS devices with
three-phase motors conform to Low-Voltage Directive 73/23/EEC.
● IEC 61800-5-2
Adjustable-speed electrical power drive systems, Part 5-2: Requirements
for safety - Functional requirements
Two-channel monitoring structure
All the main hardware and software functions for Safety Integrated are implemented in two
independent monitoring channels (e.g. switch-off signal paths, data management, data
comparison).
The two drive monitoring channels are implemented using the following components:
● Control Unit
● The Motor Module/Power Module belonging to a drive.
The monitoring functions in each monitoring channel work on the principle that a defined
status must prevail before each action is carried out and a specific acknowledgement must
be made after each action.
If these expectations of a monitoring channel are not fulfilled, the drive coasts to a standstill
(two-channel) and an appropriate message is output.