2.4.2 Mounting the extension moduleYou have the possibility to extend the interfaces of the CPU by plugging an extensionmodule. For this the extension module is plugged at the left side of the CPU. The mount-ings happens with the following proceeding:1. Remove the bus cover with a screwdriver on the left side of the CPU.2. The extension module has a locking lever on the upper and lower side. Pull theselevers outwards as shown in the figure, until these engage audible.CAUTION!It is not allowed to mount the module sideways on the mounting rail,as otherwise the module may be damaged.3. To mount plug the extension module from the top onto the mounting rail and turnthe extension module downward until it rests on the mounting rail.4. Attach the extension module to the CPU by sliding the extension module on themounting rail to the right until the interface connector slightly locks into the CPU.5. To fix the extension module at the mounting rail, move the locking levers back to theinitial position.ProceedingVIPA System MICROBasics and mountingMounting > Mounting the extension moduleHB400 | CPU | M13-CCF0000 | en | 16-4716