# 4: RF door switch safety circuit Safety door switches with a limit switch or magnetic action are easy to hack. But you cannot easily hack a safety switch that is uniquely coded with RFID. Check out this episode to see this next-level safety switch in action. The RF safety switch is used to control the relay output of the SC10 controller {% embed url="" %} Episode 4: RF door switch safety circuit {% endembed %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://wiki.codeandcompile.com/factory-automation/safety-controller/banner-sc10-series/4-rf-door-switch-safety-circuit.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.