# Channel inputs The channel inputs can be used for request-to-exit (REX) buttons, door position sensors, or lock status sensors * Configure input functions using Accessia Installer app * The inputs should only be connected to isolated switch contacts – do not connect to a power supply * Use a shielded cable and connect the shield to earth using the labeled earth post inside the enclosure * For end-of-line monitoring, use 2.2 kOhm +/- 1% resistors at the switch (Figure 1) ![Figure 1: DEOL monitored input](/files/GtG32P6M09a4T2AI9lbL) For optimum DEOL monitoring performance, keep the inputs isolated from each other. If it cannot be avoided, the two inputs on the same channel can share a common terminal. In this case, wire the two inputs as shown in Figure 2 ![Figure 2: DEOL monitored inputs with common terminal](/files/2ZJX3zBxDhAGdHdxHVwB) Adjacent to the input terminals is a switchable 12VDC power output for peripheral devices. This can be used for a touch-free REX button or a door-left-open alarm. Configure its function in Accessia installer app The labeling on the Hub shows the correct pin out for all these connections --- # 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://docs.accessia.com/hardware/ai-security-hub-hub-v1/inputs-and-outputs/channel-inputs.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.