The Delta AHCPU500-EN is a CPU module in the AH series, rated for 768 local I/O points and 32K steps (128 KB) program capacity. Execution speed on LD instructions is 0.1 μs per step, with 1K steps completing in 0.3 ms. It supports 128 function blocks and holds 16K / 16K / 512K words across data registers D, L, and B types.
The 768 local I/O points define the maximum number of on-board I/O channels without an extension backplane — this CPU supports zero extension backplanes, so all I/O must be local. Program capacity of 32K steps (128 KB) suits medium-size logic sequences; the 128 function blocks cover modular routines like timers, counters, and math operations. Internal power consumption is only 2 W, so the backplane budget is minimal. Dimensions of 110 x 40 x 103 mm fit standard DIN-rail enclosures.
Peer Comparison: AHCPU500-RS2
The AHCPU500-RS2 shares identical function blocks (128), local I/O (768), program capacity (32K steps), execution speed, data register sizes, power draw (2 W), and dimensions. The only difference is the model suffix, likely indicating a variant in communication interface or firmware region. Both parts are mechanically interchangeable — same footprint, same backplane loading — so the AHCPU500-EN can drop into a panel specified for the -RS2 without rewiring, provided the communication protocol matches the rest of the system.