Units prior to 4G and 4C respectively do not have this hardware problem.

If your WinPLC does not have a 4G or 4C revision code on the label, you do
not need to be concerned with the hardware upgrade issue.

For a complete solution, you still need the software upgrade to version 5.2.3.

Use the following picture to determine if you have an H2-WPLC1-TD (Rev 4G) that should be repaired.

Use the following picture to determine if you have an H2-WPLC2-TD (Rev 4C) that should be repaired.