# IEC selector-switch contact: 4 stable positions key selector normally closed-rotating in 2 ways Canonical URL: https://eloragrid.ai/symbols/iec-selector-switch-contact-4-stable-positions-key-selector-normally-closed-rotating-in-2-ways Publisher: Elora Grid Updated: 2026-10-28 Lookup label: SS Drawing use: Schematic Reference families: IEC, Manufacturer ## Symbol convention Convention: IEC Form: 4 Stable Positions Key Selector Normally Closed-Rotating in 2 Ways Autodesk IEC-60617 Symbol Preview: 4 Position Selector Switches, HSS12S50 / VSS12S50. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted. Selector-switch contact form: 4 Stable Positions Key Selector Normally Closed-Rotating in 2 Ways. ## In plain English ### What does IEC selector-switch contact: 4 stable positions key selector normally closed-rotating in 2 ways mean? A rotary selector has discrete handle positions and one or more contact blocks driven by its mechanism. A contact shown as normally open or normally closed describes the stated reference position; it does not give the whole switching table across the remaining positions. This entry identifies the 4 stable positions key selector normally closed-rotating in 2 ways form in the publisher's IEC-context family. ### A simple example For a local/off/remote selector, prepare a contact-versus-position chart alongside the schematic. The chart tells the installer which input is active at each handle setting, while spring-return, maintained and key-operated marks explain how the operator reaches or leaves that setting. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The selected key-selector form permits operating movement in both rotary directions; the position table must remain consistent in either approach direction. ### What the drawings help you do A vendor neutral-position number must be read with that vendor form and the project legend. It does not automatically establish a key-removal position, a contact overlap or an off state. Those details need their own table or equipment reference. ### This particular reference Selector-switch contact form: 4 Stable Positions Key Selector Normally Closed-Rotating in 2 Ways. This entry adds the 4 stable positions key selector normally closed-rotating in 2 ways detail to the broader selector-switch contact family. A vendor neutral-position number must be read with that vendor form and the project legend. It does not automatically establish a key-removal position, a contact overlap or an off state. Those details need their own table or equipment reference. ### Terms - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Signal: Electrical information passed between devices, rather than necessarily the main power supply. - Rating: A value stating the conditions for which equipment is specified. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [AutoCAD Electrical: Four-position selectors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-09243080-0BE8-4401-8E79-11156DF1CDDF.htm) ## What it represents A rotary selector has discrete handle positions and one or more contact blocks driven by its mechanism. A contact shown as normally open or normally closed describes the stated reference position; it does not give the whole switching table across the remaining positions. This entry identifies the 4 stable positions key selector normally closed-rotating in 2 ways form in the publisher's IEC-context family. For a local/off/remote selector, prepare a contact-versus-position chart alongside the schematic. The chart tells the installer which input is active at each handle setting, while spring-return, maintained and key-operated marks explain how the operator reaches or leaves that setting. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. The selected key-selector form permits operating movement in both rotary directions; the position table must remain consistent in either approach direction. A vendor neutral-position number must be read with that vendor form and the project legend. It does not automatically establish a key-removal position, a contact overlap or an off state. Those details need their own table or equipment reference. ## How to read it - The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state. - The selected key-selector form permits operating movement in both rotary directions; the position table must remain consistent in either approach direction. - A vendor neutral-position number must be read with that vendor form and the project legend. It does not automatically establish a key-removal position, a contact overlap or an off state. Those details need their own table or equipment reference. ## Information to show or reference - Label every handle position and preserve its reference orientation. - Cross-reference a contact-versus-position chart. - State maintained positions, return directions and any key-removal conditions. ## Important distinction This entry adds the 4 stable positions key selector normally closed-rotating in 2 ways detail to the broader selector-switch contact family. A vendor neutral-position number must be read with that vendor form and the project legend. It does not automatically establish a key-removal position, a contact overlap or an off state. Those details need their own table or equipment reference. ## Facts - Drawing form: 4 Stable Positions Key Selector Normally Closed-Rotating in 2 Ways - Public vendor block names: HSS12S50 / VSS12S50. Autodesk identifiers, not standards database IDs. - Drawing purpose: selector-switch contact - Graphic scope: Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint. ## Public references - [AutoCAD Electrical: Four-position selectors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-09243080-0BE8-4401-8E79-11156DF1CDDF.htm) — Autodesk. Public 4 Position Selector Switches table explicitly lists HSS12S50 / VSS12S50 with this operating or connection form. Vendor graphics are linked, not copied. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.