Installing the PSSu system
Installation Manual PSSuniversal
21262-EN-07
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– Base modules and electronic modules can be combined with compact modules at
will.
– However, if modules of the same function are combined into groups it makes things
clearer and simplifies the wiring.
– It is not possible to mix base modules with screw terminals and base modules with
spring-loaded terminals in one PSSuniversal system.
– The maximum number of input/output modules is determined through the defined
system limits.
– Input/output modules for FS applications cannot be used on head modules that do
not have an FS section.
}
Additional supply voltage modules may be required in order to refresh the module sup-
ply or periphery supply.
}
Supply groups require an additional voltage supply module at the start of each group.
The modules belonging to the supply group will then follow to the right.
}
The final element in a PSSu system is always a terminating plate containing the termin-
ating resistors for the module bus.
}
The system is attached to the mounting rail using fastening elements at the start and
end of the system. The following are available, depending on vibration and shock
stress:
– Plastic version (standard)
– Metal version (where there is increased stress)
Module layout:
Head module
End angle
(metal version
if necessary)
Supply voltage
(Supply voltage module
if necessary)
Input/output module
Electronic/base module
or
compact module
(with supply voltage modules for
potential isolation if necessary)
Terminating plate
with integrated
end angle
If necessary:
Additional metal
end angle
4.3
Connection levels
4.3.1
Connections on the base modules
The connections on the base modules are divided into connection levels and connection
columns. The connections have a two-digit number.
