Efficient Networks S120 manual Two-channel monitoring structure

Models: S120

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Safety Integrated basic functions

9.1General information

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.

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Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

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Efficient Networks S120 manual Two-channel monitoring structure, Safety Integrated basic functions General information