Product Overview
1.2 Application of ET 200pro fail-safe modules
ET 200pro Distributed I/O System - Fail-Safe Modules
16
Operating Instructions, 05/2007, A5E00394073-02
Application Limited to Safety Mode
You can operate standard and fail-safe modules simultaneously in an ET 200pro.
Fail-safe modules can only be used in safety mode. They cannot be operated in standard
mode.
Achievable Safety Classes
Fail-safe modules are equipped with integrated safety functions for safety mode.
The following safety classes can be achieved by assigning applicable parameters to the
safety functions in
STEP 7 with the S7 Distributed Safety or S7 F/FH Systems optional
package, combining certain standard and F-modules and arranging the wiring of the sensors
and actuators in a specific way:
Table 1-1
Achievable Safety Classes in Safety Mode
Safety class in safety mode
In accordance with IEC
61508
In accordance with EN 954-1
In accordance with Performance
Level (PL)
SIL2
Category 3
d
SIL3
Category 3
e
SIL3
Category 4
e
See also
