# Hardware configuration

Depending on the jumpers settings inside the unit, every of three output channels marked CH1, CH2 and CH3 can work as:

1. Normally opened (NO) isolated switch.
2. Normally closed (NC) isolated switch.
3. Power source on when condition is **true** (PS).
4. Power source on when condition is **not true** (NPS).

<figure><img src="/files/fbIlzymXZHLvFTXbvCjg" alt=""><figcaption></figcaption></figure>

All these modes are described in the following chapters.


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