Depending on the operating mode (standard or redundant), one or two power supply modules are plugged onto the corresponding terminal modules. In standard mode, a PS power supply module is combined with a TM?PS?A terminal module. In redundant mode, a second power supply unit is provided on the right of the first one. This consists of a PS power supply module and a TM?PS?B terminal module.

The power supply modules can also be used in hazardous areas. The explosion protection is guaranteed by an explosion-proof metal enclosure (explosion protection EEx d).

The power source (24 V DC or 120/230 V AC) must be installed in the safe area. It is connected to the terminal module of the power supply unit via EEX e terminals. The power source may only be connected or disconnected in a safe operating environment and not in hazardous areas.

The power supply module is moved into its working position by means of a slide system, and manually fixed there by means of a mechanical lock. Replacement through disconnection of the existing power supply module and insertion of a new module is also permissible in the hazardous area. To replace the module, the mechanical lock must first be released to remove the module from its working position using the slide.