The DVP80EH00R3 is a Delta DVP Series Main Processing Unit (Base Unit) with 80 I/O points. It's the CPU and backplane in one — no separate rack or power supply module to spec for the base configuration. The 80-point count tells you the maximum local I/O this unit handles before you need an expansion bus.
The DVP80EH00R3 shares the same 80-point I/O count and base-unit form factor as the earlier DVP80EH00R2. The key difference is the processor generation — the R3 carries the EH3 series firmware and hardware revision, which affects scan cycle timing and instruction set compatibility. If your program uses newer EH3-specific instructions, the R2 won't run it. For a drop-in replacement on an existing R2 panel, verify the firmware revision first.