In order to update a SDL’s firmware using a UW-USB-485P communicaiton cable, the communication protocol must be changed to RS-485.
1. Establish temporary RS-485 communicaiton with the device by following the steps in the Direct connection with an SDL500 via RS-485 article.
2. From the menu bar select Edit | Preferences.
3. Switch to the GUI tab.
4. Check the “Enable advanced interface” box, then click OK.
![](http://www.nexsens.com/wp-content/uploads/2013/07/table185.png)
Figure 1: Enable Advanced Interface
5. From the menu bar select Advanced | iSIC | iSIC.
6. Confirm that the correct PC Com Port and Address are selected and set the Connection to iSIC (Direct connect).
7. Click Connect.
![](http://www.nexsens.com/wp-content/uploads/2013/07/table186.png)
Figure 2: iSIC Setup Connection Tab
8. Click the General tab.
9. Check the “Change protocol” box and from the drop down menu select RS-485.
- Record the current protocol for future reference.
10. Click Apply. The iSIC data logger is now permanently configured for RS-485 communication.
![](http://www.nexsens.com/wp-content/uploads/2013/07/table187.png)
Figure 3: Change Protocol
11. Update the device firmware by following the Updating an iSIC or SDL’s firmware process.
12. Repeat steps 5-10 to change the protocol back to the original configuration.
REV: 13G19