Siemens SIRIUS 3RT Series System Manual page 46

System overview
1.7 Components and combinations
Size-specific accessories for contactors (size S0)
1 Contactor size S0
2 Laterally mountable auxiliary switch block (right or left), 2-pole
3 Auxiliary switch block for snapping onto the front, 1-pole (cable entry from above or below)
4 Auxiliary switch block for snapping onto the front, 4-pole
5 Auxiliary switch block for snapping onto the front, 2-pole (cable entry from above or below)
6 Surge suppressor
7 Function module for AS-Interface, direct-on-line start
8 3RA28 function modules
9 Function module for IO-Link, direct-on-line start
10 Pneumatic delay block
11 Mechanical latch
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SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03