# General information
Download technical specification[Technical Specification](https://www.atreyo.in/sites/default/files/a-download/AMB-4I-4O%20Technical%20Specification.pdf)
--- #### Connection information Below is a description of the expander connectors. The outputs of the expander are directly connected to the relay leads. The relays are of normal open type. ![AMB-4I-4O connectors.png](https://docs.atreyo.in/uploads/images/gallery/2025-03/scaled-1680-/amb-4i-4o-connectors.png)