Fail-Safe Modules
7.5 4/8 F-DI DC24V PROFIsafe Digital Electronic Module
ET 200S Distributed I/O System - Fail-Safe Modules
114 Installation and Operating Manual, 08/2008, A5E00103686-07
Conditions for achieving SIL/Category/PL
The table below lists the conditions which have to be met for achieving the various safety
categories.
Table 7- 18 EM 4/8 F-DI DC24V PROFIsafe: Conditions for achieving SIL/Category/PL
Application Sensors Sensor
Evaluation
Sensor Supply achievable
SIL/Category/
PL
Internal, with short-
circuit test
Internal, without short-
circuit test
1 1-channel 1oo1
External
2 / 3 / d
Internal, with short-
circuit test
Internal, without short-
circuit test
2.1 1-channel 1oo2
External
Internal, without short-
circuit test
2.2 2-channel
equivalent
1oo2
External
Internal, without short-
circuit test
2.3 2-channel,
nonequivalent
1oo2
External
3 / 3 / e
3.1 2-channel
equivalent
3.2 2-channel,
nonequivalent
1oo2 Internal, with short-
circuit test
3 / 4 / e
Note
You can operate the various inputs of an F-DI module simultaneously in SIL2/Category
3/PLd and SIL3/Category 3 or 4/PLe. You only have to connect the inputs and assign the
parameters as shown in the following chapters.
Sensor Requirements
Please note the information in section
"Requirements for Sensors and Actuators"
when using
sensors for safety-related applications.
See also
Requirements for Sensors and Actuators (Page 37)
Using ET 200S Fail-Safe Modules (Page 14)
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