Navigation
EXT SSC
UCC and SPA3-2 interconnection
![Non-UCC2 interconnection and SPA3-2](/cmmsupport/knowledgebase/media/img/gen/d3127843949c4605a70e8113aa98db73.png)
UCC and dual SPA3-2 interconnection
![Non-UCC2 interconnection and dual SPA3-2](/cmmsupport/knowledgebase/media/img/gen/3fcfcae39e0440088cb8a393f1e32433.png)
NOTE: For dual SPA3-2 installations the SPA connected to port 1 of the controller is considered the MASTER. The master SPA3-2 must be connected to the MCU, machine I/O and RS232.