# Introduction

This document goes through all the parts that make up the XBB020 or XBB021 and how to produce such a device. The only thing that separates XBB020 and XBB021 is the label, where XBB020 is ICU's product and XBB021 is marked with Astec's designation.

An XBB020/21 consists of three cards; a BBO and two analogue cards that are connected to the BBO. Everything is mounted in a box and an Ethernet cable is connected for configuration and communication, as well as a power unit with a micro-USB connector for power supply.


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