Station analogue scaling interface

What it represents

Maps the source measurement representation to the assigned station engineering quantity. Station automation collects measurements and statuses and issues assigned commands through defined authority paths. A communicated point has a value, quality and equipment identity; it should not be treated as an unexplained contact.

In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Raw measurement and scale” at the input and “Engineering-unit measurement” at the output. Scale and units require explicit configuration.

Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.

How to read it

• Start at the named input: Raw measurement and scale. Identify its source device or document and the state represented on the drawing.
• Follow the named output: Engineering-unit measurement. Cross-reference its destination and separate the command from confirmation that the equipment responded.
• Scale and units require explicit configuration.
• Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability.

Information to show or reference

• Label the source and connection reference for raw measurement and scale.
• Identify the destination and defined state of engineering-unit measurement.
• Record the equipment or control-document revision supporting this functional block.
• Check this application limit in the project design: Scale and units require explicit configuration.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.