The system modules for the CX20xx and CX56x0 family are connected to the CPU on the left-hand side via a multi-pin connector. Internally they are connected via PCI Express. Up to four modules can be connected in any order.
The CX2500-0020 audio module (only for CX20x0 and CX56x0) has jack plugs (5 x 3.5 mm) and an optical TOSLINK socket for digital signals (SPDIF). Up to 7.1 multi-channel audio can be used.
Data Sheet: cx2500-0020en