Independent public references

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Standards references, public manufacturer information and official CAD resources support this library. Original explanations and illustrations are kept distinct from publisher material.

A public download is not automatically licensed for redistribution. Manufacturer graphics, CAD files and standards content remain at their original sources; original artwork has its own clearly stated scope and licence.

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Westermo

Industrial cellular routers and gateways

Public product family page for industrial routers and gateways, including stateful firewall functions.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Westermo

Industrial Ethernet to fibre media converters

Public product family page for copper Ethernet to multimode or single-mode fibre conversion.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Westermo

Industrial PoE Ethernet switches

Public product family page for Ethernet switches that supply Power over Ethernet to field devices.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Texas Instruments

SNx4HC11 triple 3-input AND gates

Device documentation for three-input AND gates.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Texas Instruments

SNx4HC20 dual 4-input NAND gates

Device documentation for four-input NAND gates.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Texas Instruments

SNx4HC27 triple 3-input NOR gates

Device documentation for three-input NOR gates.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Texas Instruments

CDx4HC4075 triple 3-input OR gates

Device documentation for three-input OR gates.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Texas Instruments

SN74LS51 AND-OR-invert gates

Device documentation for AND-OR-invert gates.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Hitachi Energy

STATCOM: converter-based reactive power compensation

Public STATCOM description: voltage-source converter, reactive power support and active filtering capability.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Hitachi Energy

Static Var Compensators (SVC)

Public SVC description naming thyristor-controlled reactor, thyristor-switched capacitor and harmonic filter branches.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Hitachi Energy

Capacitor and filter product offerings

Public overview of passive and harmonic filters and shunt compensation banks with and without reactors.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Hitachi Energy

Synchronous Condenser System

Public synchronous condenser description: reactive power, inertia and short-circuit power, pony motor start.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

DEIF

ATS controllers

Public automatic transfer controller description including generator-mains mode and overlap switching.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

DEIF

Single genset controllers for backup power

Public single genset controller description covering start, stop, engine and generator protection.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Victron Energy

Inverters product listing

Public inverter product range listing with DC input and AC output ratings.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 Symbol Preview: Motor Starters

Public motor starters family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 Symbol Preview: Photoelectric Emitter Switches

Public photoelectric emitter switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 Symbol Preview: Photoelectric Receiver Switches

Public photoelectric receiver switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Power Switches

Public power switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: 3 Phase Transformers

Public 3 phase transformers family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Counter Relays

Public counter relays family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Inductive Switches

Public inductive switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Capacitive Switches

Public capacitive switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Magnetic Switches

Public magnetic switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Photoelectric Emitter/Receiver Switches

Public photoelectric emitter/receiver switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Current Protection Relays

Public current protection relays family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Voltage Protection Relays

Public voltage protection relays family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Miscellaneous Relays

Public miscellaneous relays family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Electronics

Public electronics family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Power Stations

Public power stations family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Winding

Public winding family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Mechanical Controls

Public mechanical controls family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device

Public mechanical controls, latching device family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Mechanical Controls, Coupling

Public mechanical controls, coupling family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Annunciations

Public annunciations family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Solenoids

Public solenoids family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Ultrasonic Switches

Public ultrasonic switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEEE Symbol Preview: Touch Switches

Public touch switches family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.

Public reference checked 28 October 2026 · Publisher material linked, not redistributed