S27x Upgrade Firmware Instruction Page 2 of 6 Ver1.0 WWW.GSM-M2M.COM
GSM 3G M2M
RTU
utomation solution
The S27x GSM 3G M2M RTU supports upgrade firmware by USB port, please follow below instructions to
upgrade it if you required to upgrade the firmware.
Step 1: Connect the unit to the computer using the USB cable.
Step 2: Open the uint 's back cover, turn the Upgrade Firmware Switch to “Load” side.
S270/S271 Back side S272/273/275 Back side
Step 3: Connect the external DC Power to the RTU, and Switch ON the S27x RTU by the power switch.
Step 4: install software, extract the software.
Step 5: Click install shortcuts
Step 6: Install USB Drvier
Please Contact the unit to the PC by USB Cable, and then install the USB Driver to the computer from the
CD firstly. When successful, it can be found out at the device manager of the XP or Windows 7 or Win10,
please see the below photo. Also, the driver for different OS can be downloaded from Silicon Laboratories,
Inc. http://www.silabs.com , the model is CP210x.
