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Safety & Safety Requirements
Functional Safety Measures Implemented in this Architecture
Overview
Within the described architecture, there are 2 safety functions covering different risks. These will
be described in the following sections.
NOTE: The safety functions proposed in this architecture do not provide a preferred safety chain
solution for your machine. These are proposals as to how a safety function could be realized.
WARNING
UNINTENDED EQUIPMENT OPERATION
Ensure that a risk assessment is conducted and respected according to EN/ISO 12100 during
the design of your machine.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
Emergency Stop
In this TVDA, the safety function emergency stop is applied to disconnect the main power supply
of all drives.
This safety architecture is conforming to category 4 EN ISO 13849-1:2008 and is using the stop
category 0 in accordance with the standard IEC/EN 60204-1.
The architecture achieves a performance level (PL) of e and a safety integrity level (SIL) of 3.
Used devices:
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Device
Description
Input
2 channel emergency stop button Harmony XAL K
Logic
Preventa safety module TM3 SAF5R
Output
2 redundant contactors with feedback loop LC1D
EIO0000001677 06/2014