Siemens SIRIUS 3RT Series System Manual page 595

Types of adapter
The DIN rail adapter is the same for all devices. A pair of adapters is required for mounting a
reversing contactor assembly.
Figure 6-2
Connecting the adapters for reversing contactor assemblies
The DIN rail adapters can be connected without the need for tools. Link wedges simply need
to be plugged in on the rear of the adapters.
Two link wedges are required to connect two DIN rail adapters.
Figure 6-3
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
DIN rail adapters, individual and as a pair
Connecting DIN rail adapters with link wedges
SIRIUS 3RA21/22 load feeders
6.6 Mounting
595