PLC I/O
PLC input / output
A controller interface point connecting field signals to an identified module channel.
Schematic
Protection functions · 16
Data communications device
Identifies equipment carrying data between control, protection or monitoring devices.
SLD / Schematic · 16
What it represents
Identifies equipment carrying data between control, protection or monitoring devices.
In a drafting package, connect this reference to the communication medium and connected endpoints. The associated drawing should trace the network ports, link identifiers and architecture drawing; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the communication medium and connected endpoints.
- Trace the network ports, link identifiers and architecture drawing.
Information to show or reference
- Label the communication medium and connected endpoints.
- Cross-reference the network ports, link identifiers and architecture drawing.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
Device 16 describes the communication role; its suffix and network legend determine whether the item is a switch, router or other device.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ANSI device-number and suffix reference table
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
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. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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