Fail-safe power modules and fail-safe digital modules are available for connecting digital
sensors/encoders and actuators/loads to the ET 200S. This chapter provides the following
information for each fail-safe module:
● Properties and special features
● Front view, terminal assignment for terminal modules and the block diagram
● Wiring diagram and programmable parameters
● Diagnostic functions, including corrective measures
● Technical specifications
Description of Usable Standard Power Models and Terminal Modules
Usable standard power modules and terminal modules are described in the ET 200S
distributed I/O system operating instructions.
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
The safety characteristics in the technical specifications apply for proof test intervals of
20 years and repair times of 100 hours. If a repair within 100 hours is not possible, then
remove the respective module from the terminal module or switch off its supply voltage
before 100 hours expires.
Then proceed as described in the chapter "Reactions to Faults (Page 41)".