symbol that needs clarification

Trying to figure out what this symbol means, for context here's the rung on the ladder logic diagram that it was taken from. enter image description here

  • \$\begingroup\$ You appear to be talking about ladder logic. If so, could you edit your question to say so? I would go as far as to suggest that your title should say "ladder logic" in it somewhere. \$\endgroup\$
    – TimWescott
    Dec 21, 2022 at 15:39
  • \$\begingroup\$ @TimWescott I'm only focused on the symbol meaning. I put the schematic I took it from so that it could probably offer additional meaning. You're certain I should mention ladder logic? \$\endgroup\$
    – SRR
    Dec 21, 2022 at 15:44
  • 2
    \$\begingroup\$ @SRR Ladder logic uses a very different set of symbols than anything else in electrical engineering, so yes, you should definitely mention the context in which you see the symbol. \$\endgroup\$
    – Hearth
    Dec 21, 2022 at 15:46
  • \$\begingroup\$ What country or region did this schematic originate from? Is it a fluidic (pneumatic or hydraulic) system? The symbol suggests some kind of limit function. \$\endgroup\$ Dec 21, 2022 at 16:09
  • 1
    \$\begingroup\$ You should add the info from your comments to the question. \$\endgroup\$ Dec 21, 2022 at 17:14

1 Answer 1


The symbol relates to an SPST toggle / rotary switch.


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