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V01.01 | 2018/11
13
7
Using the Device in Safety Applications
The device is designed in accordance with EN ISO 13849-1 “Safety of machinery - Safety-related
parts of control systems”.
7.1
Safety Function
The safety function is executed by the higher-level system.
The supply voltage (V2) of the outputs at C4…C7 can be safely switched off by an external
safety relay or a safety PLC.
Safe Status
In the safe state, the outputs at C4…C7 are switched off (0). The disconnection is done extern-
ally in the higher-level system.
Performance Level (PL)/SIL Level
In safety functions based only on fault exclusions, a maximum of PL d EN ISO 13849) and SIL 2
(EN IEC 61508) can be reached. The device is part of a safety-related overall system. The overall
system must always be evaluated as a whole with regard to the requirements of EN ISO 13849-1
and EN IEC 61508.
7.1.1
Safety Characteristic Data for the Galvanic Isolation
Characteristic data
Value
Standard
PFH
D
Average frequency of dangerous failure per hour
5 × 10
-9
1/h
IEC/EN 61508;
EN/IEC 62061;
EN/ISO 13849-1
MTTF
D
Mean Time To Failure Dangerous
> 100 a
EN/ISO 13849-1: 2016
PL (Performance Level)
d
EN/ISO 13849-1: 2016
SIL (Safety Integrity Level)
2
IEC/EN 61508
Diagnostic Coverage
0…99 %
EN/ISO 13849-1: 2016
7.1.2
Cited Standards
Standard
Title
DIN EN ISO 13849-1:2016
Safety of machinery – Safety-related parts of control systems
DIN EN 62061:2005 + A1:2013
IEC 62061:2005
Safety of machinery – Functional safety of safety-related elec-
trical, electronic and programmable electronic control systems
DIN EN 61508:2011
IEC 61508:2010
Functional safety of electrical/electronic/programmable elec-
tronic safety-related systems
DIN EN 61131-2:2008
IEC 61131-2:2007
Programmable controllers
EN ISO/ISO 12100
Safety of machinery – General principles for design – Risk as-
sessment and risk reduction