Fail-Safe Modules 
  7.7 4 F-DO DC24V/2A PROFIsafe digital electronic module 
ET 200S Distributed I/O System - Fail-Safe Modules 
Installation and Operating Manual, 08/2008, A5E00103686-07 
165 
Magnetic capacitance with inductive loads 
 
 
Note 
Note that an inductive load connected to the DO channels can induce voltages in the case of 
electromagnetic interference of a strong magnetic field. This can cause a short-circuit error 
message. 
Remedy: 
•  Spatially disconnect the inductive loads or shield against the magnetic field. 
•  Set the parameters for the readback time to 50 ms or higher. 
 
7.7.2  Terminal assignment of the EM 4 F-DO DC24V/2A PROFIsafe 
Front View 
*URXSIDXOWGLVSOD\UHG
6WDWXVGLVSOD\VIRU
RXWSXWVJUHHQ
 
Figure 7-48  Front view EM 4 F-DO DC24V/2A PROFIsafe 
 
WARNING 
 
The SF LED and the status displays of the inputs/outputs are not designed for safety-
related functions and may therefore not be evaluated for safety-related activities.