Specifications

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Human Machine Interface A Human Machine Interface (HMI) is any device that acts
as a link between the operator and the machine. Typically,
however, the term HMI refers to devices that display machine or
process information and provide a means for entering control
information. Siemens SIMATIC HMI products provide a range of
options from the operator control and monitoring devices and
visualization software needed for machine-level interfaces to
scalable systems for plant-wide process control.
SITOP Power Supplies Often control components of various types require a regulated
power supply. Siemens offers a range of SITOP regulated
24 VDC power supplies. In addition, options for additional
voltages are also available.
Machine Control Example In the following machine example, an S7-1200 PLC is mounted
in a machine’s control panel. The manufacturer of the machine
has chosen to use field devices that require 24 VDC power. The
power for the field devices and the PLC is provided by a SITOP
power supply, shown adjacent to the S7-1200 PLC.