SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005
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Product description
3
Applications
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.
The function modules are subdivided into function modules with communication interfacing
and function modules without communication interfacing.
Function modules
3RA28 function modules
Electronic timing relays with semiconductor
output
Solid-state time-delay auxiliary switches
Function module for star-delta (wye-delta) start
3RA27 function modules with communication
connection
Function modules for AS-Interface
Function modules for IO-Link
This chapter describes 3RA28 function modules without a communication connection. You
will find information about function modules with a communication connection in the
corresponding manuals.
Function
Function modules are used to delay switching functions.
System integration
The 3RA28 function modules have been matched to the contactors in the 3RT2 series and to
the contactor relays in the 3RH2 series
1)
both electrically and mechanically, and can be
integrated in the feeders by directly mounting them on contactors. The function modules can
be used for size S00, S0, S2 and S3 contactors.
The 3RA27 function modules can only be used for communication-capable contactors.
1)
The 3RA28 function modules must not be mounted on 3RH2 coupling relays.
