Here is a guide showing how to update the firmware on a Trimble Total Station using Trimble Installation Manager installed on a windows device PDF - How to update the firmware on a Trimble Total Station using Trimble Installation Manager
The following link is for the Trimble Controller Operating System & Firmware downloads Portal, a useful resource for updating controller firmware. Each controller in the list has a PDF download containing installation instructions. Trimble Controller Firmware Downloads
This guide details the process of updating or reinstalling the firmware for a Trimble S-Series Total Station. Updating the firmware on Trimble S-Series Total Station.pdf