Product overview
1.2 Hardware and software components
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
13
Hardware and software components
S7-1200 Fail-Safe CPUs and SMs
There are four fail-safe CPUs and three fail-safe signal modules (SM) in conjunction with the
S7-1200 V4.1 or later release:
● CPU 1214FC DC/DC/DC
● CPU 1214FC DC/DC/RLY
● CPU 1215FC DC/DC/DC
● CPU 1215FC DC/DC/RLY
● SM 1226 F-DI 16 x 24 VDC
● SM 1226 F-DQ 4 x 24 VDC
● SM 1226 F-DQ 2 x Relay
An S7-1200 fail-safe system requires a fail-safe CPU and fail-safe SMs. The integrated I/O
on the CPU is not fail-safe, but can be used to complete other control functions.
The S7-1200 standard signal modules (SM), communication modules (CM), and signal
boards (SB) can be used in the same system with fail-safe SMs to complete your application
control functions that do not require a rated Safety Integrity Level (SIL). Standard SMs that
are supported for use with fail-safe SMs have the article numbers (6ES7 --- ---32 0XB0) or
later.
The S7-1200 fail-safe CPUs do not support PROFIBUS or PROFINET distributed fail-safe
I/O.
Required software components
You require one of the following software combinations:
● STEP 7 Basic V13 SP1 or later with STEP 7 Safety Basic V13 SP1 or later
● STEP 7 Professional V13 SP1 or later with STEP 7 Safety Advanced V13 SP1 or later
STEP 7 Safety Advanced V13 SP1 or later and STEP 7 Safety Basic V13 SP1 or later are
the configuration and programming software packages for the SIMATIC Safety fail-safe
system. In both software packages, you receive the following:
● Support for configuring the fail-safe CPUs and SMs in the hardware and network editor of
the TIA portal
● Support for creating the safety program using LAD and FBD and integrating error
detection functions into the safety program
● Instructions for programming your safety program in LAD and FBD, which you are familiar
with from the standard user programs
● Instructions for programming your safety program in LAD and FBD with special safety
functions
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