Getting Started
Fail-Safe Systems
A5E00085588-03
2-5
Connect actuators, or alternatively terminating resistors, to the output module (e.g.
between 12 Ω and 3.4 kΩ with 1 watt), or disable group diagnosis for unused
channels in the hardware configuration.
Interface restrictions between S7-400 CPU and ET 200M I/O
The ET 200M components which can be used in safety mode depend on the safety
class and the use of a safety protector in the ET 200M configuration:
• If you comply with the requirements of safety class SIL 2 or use a safety
protector in SIL 3 in ET 200M, you can use all the available IM 153-2 interface
modules and you can set up the PROFIBUS-DP with the copper cable (as in
standard mode).
• If you don’t use a safety protector in SIL 3 in ET 200M, you must connect the
PROFIBUS-DP lines - the S7 F System and the S7 400H programmable
controllers with fiber optic cables as described in the S7 F/FH Programmable
Controllers.
Additional Information
You can find detailed descriptions of the hardware components in the following
manuals:
•
S7-400, M7-400 Programmable Controllers, Installation and Module
Specifications
•
S7-400H Programmable Controller, Fault-Tolerant Systems
•
S7-300 Programmable Controller, Fail-Safe Signal Modules
•
ET 200S Distributed I/O System, Fail-Safe Modules
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