With the RANGER powered off install the expansion card on the radio and secure with the supplied nut.
The A2D1 card can be enabled from the Settings menu under "Select Daughter Card"
The HART, Modbus and SDI-12 cards require that the corresponding firmware is loaded onto the RANGER.
From the RANGER ToolKit, select Update Firmware from the Tools menu and select the latest firmware variant that corresponds to the installed card. For example, to enable the HART card on a v0.1.15 RANGER, upload firmware v0.1.15-modbus.