44 Using in Safety Related Applications
WAGO-I/O-SYSTEM 750 XTR
750-537/040-000 8DO 24 VDC 0.5A Diagn XTR
Manual
Version 1.1.1
7.2
Connection for the I/O Module to Safety Switching
Devices or F I/O Modules
7.2.1
General Structure of a Potential Group
When using the interference-free I/O module 750-537/040-000 in safety-related
applications, the I/O modules belonging to a safety switching device shall be
combined to form a potential group. The power supply of the potential group may
only be provided via the following supply or filter modules:
Table 24: Supply or Filter Modules for Setting up a Potential Group
Supply Terminal Blocks
750-602/040-000
750-612/040-000
750-613/040-000
Field-side power supply filter
Power supply filter
750-624/040-001
750-626/040-000
The potential group must be terminated by one of the listed supply or filter
modules or by the end module 750-600/040-000.
Figure 12: Setting up a Potential Group (Example)