Siemens SIRIUS 3RF Series

System overview
1.7 Components and combinations
SIRIUS Innovations
68 System Manual, 01/2011, A8E56203870002-03
1.7.5.2 SIRIUS 3RA27 function modules for connection to the automation level
3RA27 function modules for connection to the automation level
3RA27 function modules are integrated into the higher-level control system via an IO-Link
master or AS-Interface. They facilitate the simple exchange of data with the control.
Communication-capable function modules are mounted on contactors or contactor
assemblies with a communication connection from the SIRIUS device family.
Table 1- 19 3RA27 function modules for connection to the automation level
Area Customer benefits
Functions
 Connection of direct-on-line, reversing, and star-delta (wye-delta) starters
to the automation level
 Function modules with IO-Link or AS-i interface
 2- or 3-wire communication to the control
 Integrated logic functions for starter types
 Replacement of laborious control circuit wiring
 Additional diagnostics via IO-Link.
Dimensioning and
design
 One module for both sizes S00 and S0
 Standard motor starter profile for all starter types
 Starter-oriented configuration in the TIA environment
 IO-Link:
– Up to 4 feeders in one group per channel on the master
– Addressing not required
 AS-i
– One address per feeder
– Max. 62 addresses
Mounting
advantages
 Just a few cable connections to the control
 Considerably minimized wiring complexity within a starter
 Also available as pre-assembled contactor assemblies (e.g. star-delta
(wye-delta) starters)
 No control circuit wiring to the motor starter protector (voltage check)
 Available with screw-type and spring-loaded connection systems
Application
areas/customer
benefits
 Easy and fast connection of a load feeder to the control
 Reduced number of I/O channels on the control
 Easy and fast configuration
 Improved transparency through integrated diagnostics