Hello. I know there were many versions of the C200H series PLC CPUs; and not all the literature is available online. Can anyone help me to confirm what are the differences between C200HG-CPU43 and C200HG-CPU43E? Are these two different CPU part numbers or is it just one? If these are two different CPUs, Can -CPU43E replace -CPU43? Omron list price only shows -CPU43E as an active part number.