Siemens just expanded the portfolio of system components for SIMATIC HMI PRO devices with the Extension Unit box, which can now be ordered in sizes ranging from 12 inches to 22 inches.
The Extension Unit box is there to facilitate customer customization. It consists of an empty enclosure into which customer-specific components can be installed. The mounting slots are not pre- perforated and have to be created individually. The amount of mounting slots is dependent on the number of control elements used. The unit offers sufficient space for a great many pieces of equipment, system components, and operator controls such as SIRIUS ACT. Four screw channels are available on the inside for universal use.
The concept behind the box is for one or more boxes to be mounted below a Siemens 16:9 SIMATIC PRO device. It can be set up as a pedestal via an extendable, flange bottom, or used for a support arm with an extendable, round tube. Units of 12-inch, 15-inch,19-inch, and 22-inch are available, with the option of handles and keyboard tray installations. They are all-round IP65 as well as enclosure type 4/4x protected.
Note, however, that standard PRO operator controls cannot be installed in the Extension Unit box. Instead, these units are only intended for installation of components with a maximum rated voltage of 24 V DC. Further, there is no integrated cable harness or communications module is inside the unit.
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