> For the complete documentation index, see [llms.txt](https://docs.accessia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.accessia.com/hardware/ai-security-hub-hub-v1/inputs-and-outputs/channel-inputs.md).

# 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