BECKHOFF CX2500­0020 - Manual (Page 11)

Mounting and wiring
3.3 Attaching the system interface to the CX20x0
system
Opening the PCI Express bus cover
The system interfaces for the CX20x0 system are connected via the internal PCI Express bus, which has a
protective cap. The cap can be removed with a screwdriver. To this end insert the screwdriver into the recess
in the short side (see diagram) and lever off the cap. The bus connector is then accessible, as shown in the
diagram.
Once the bus connector is accessible, the module can be attached on the left­hand side.
The module audibly locks into place.
Further modules can be connected to the system in the same way. Once all modules are connected, the
system is placed on the DIN rail as a block. For details please refer to the section on DIN rail mounting.
Notice
Maximum number of system interfaces
Up to four system interfaces can be attached on the left­hand side of the system.
CX2500­0020 11 Version 1.0