The system modules are connected to the CPU on the left side via a multi-pin connector. Internally they are connected via PCI Express. For the CX20xx series, up to four modules can be connected in any order. A module can be connected to CX52x0, CX53x0 or CX56x0.

The CX2500-0070 USB module adds four additional USB 3.0 interfaces.

CX2500-0070 USB 3.0 Module for CX20xx, CX52xx, CX53x0, CX56x0

Specifications	CX2500-0070
Display	4 x USB 3.0 (maximum total current 2 A)
Connection type	4 x USB 3.0, type A
Power supply	via system bus (via CX2100-0xxx power supply modules)
Dimensions (W x H x D)	24 mm x 99 mm x 54,5 mm
Weight	about 195 g
Relative humidity	95%, no condensation
Operating/storage temperature	-25…+60 °C/-40…+85 °C
Anti-vibration/shock	conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission	Complies with EN 61000-6-2/EN 61000-6-4
Protection rating	IP20