Figure 16: J-Flash Tool Device Programming - Honeywell ISA100 Gen X User Manual

Step 3:
After selecting the HEX file, click on Program Device option. The program will be flashed to the device.

Figure 16: J-Flash tool device programming

Once the device has been flashed with the firmware the "Programming done" will be displayed in the Log section.
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Release Independent ISA100 Gen X Radio Module User's Guide
April 2018 Honeywell