Function Modules - Siemens SIRIUS 3RT Series System Manual

1.7.5

Function modules

Figure 1-31
Function modules are used to perform various control jobs on automatic production lines and
for processing machines. They are suited to all time-delayed switching operations in control,
starting, protection, and regulation circuits, and ensure a high degree of repeat accuracy for
delay times, once they have been set.
Function modules are divided into those with a communication connection (AS-Interface or
IO-Link) and those without a communication connection.
Communication-capable 3RA27 function modules are available for the following contactors
and contactor assemblies:
● For direct-on-line start
● For reversing start
● For star-delta (wye-delta) start
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Function modules
System overview
1.7 Components and combinations
65