Siemens SIRIUS 3RH Series, System Manual

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SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
7.7 Connection
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
669
7.7 Connection
7.7.1 Connecting the function modules for direct-on-line start
7.7.1.1 Connecting the solid-state timing relay with semiconductor output
Connection types
The solid-state timing relay with semiconductor output is connected via removable terminals
with the following connection options:
●
Screw-type
● Spring-loaded
Connection
The Connection systems (Page 74) section of the chapter titled System overview describes
how the screw-type/spring-loaded connections are made.
Note
During the mounting process, the solid-state timing relay is connected to coil terminals A1
and A2 at the same time (by means of plug-in contacts). Contactor coil terminals which are
not required are not covered by the timing relay enclosure.
Avoid incorrect connection.
NOTICE
The 3RA2811 timing relay with ON-delay is connected to the contactor coil in series.
Contactor coil terminal A1 must not be connected.
Designation Terminal Circuit diagram
3RA2811-.CW10
ON-delay
A3 (+)
1
/
4
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