Roller-operation qualifier

What it represents

This qualifier identifies contact with a roller-operated mechanism. A roller receives mechanical movement from another part and transfers it to the operating mechanism. It often helps explain a positional switch relationship on a machine or moving assembly.

Associate the mechanism with the physical position or movement it senses. Keep the corresponding electrical contact state and equipment tag explicit in the schematic.

How to read it

• Associate the roller with its driven position and contact operating condition.
• A roller qualifier identifies actuation, not the electrical contact rating.

Information to show or reference

• Identify the associated device, circuit or diagram boundary.
• Associate the roller with its driven position and contact operating condition.
• Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

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. 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.

Entry JSON · Entry Markdown · Last editorial update: 14 October 2026