Appendix
A.6 Fail-safe shutdown of the ET 200pro Standard edition modules
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
525
WARNING
To avoid cross circuits between the current-sourcing switch and current-sinking switch of a
fail-safe digital output, you must route the cable for connecting the relays at the current-
sourcing and current-sinking switches such that they are cross-circuit proof (e.g. through
kink-proof routing in a conduit or in cable duct).
Note the EN 60204-1 standard, "Safely protected routing"!
F-switch PROFIsafe
Fail-safe shutdown (system-integrated solution, see section Placement of PM-O DC 2x24V
Outgoing Module (Page 40)) is also possible with the F-switch PROFIsafe electronic module
(6ES7148-4FS00-0AB0).
The fail-safe F-switch PROFIsafe records the signal states of safety-related encoders and
sends corresponding safety message frames to the F-CPU. It is suitable for connecting
frequency converters, motors, and output modules.
You can find additional information in the ET 200pro Distributed I/O System - Fail-Safe
Modules (
http://support.automation.siemens.com/WW/view/en/22098524
) Operating
Instructions and in the following TÜV certificate.
Request TÜV certificate (Report no. SA66851 T, Revision 1.1, June 6, 2007)
You can request copies of the TÜV certificate and the accompanying report at the following
address:
Siemens AG
Automation & Drives
A&D AS RD ST
P.O. Box 1963
92209 Amberg, Germany