This document is the property of LANDI.Its content cannot be reproduced or divulged without the company’s written approval.11 / 18*****************************************************************************************WARNINGDon’t connect the port by mistake, because any act of error may cause a failure of the terminals.*****************************************************************************************3 Product Installation Guide3.1 SAM Card InstallationInsert SAM card:Insert the SAM card gently following arrow direction, until it is completely embedded.The POS terminal is designed with two SAM slots.Remove the SAM card:Press the top of the SAM cards and pull it out slowly.******************************************************************************************NOTEWhen using only one SAM card, it is recommended to insert SAM1 slot (bottom).******************************************************************************************3.2 SIM Card InstallationSame procedures as above Chapter 3.1SN SIGNAL Function description1 VBUS USB Power portˈ5.0V2 D- Data line, differential signal-3 D+ Data line, differential signal+4 GND GND