Delta AH AHCPU521-DNP

AHCPU521-DNP: source-backed AH system component. Confirm exact application compatibility and current supply before ordering.

Manufacturer part number: AHCPU521-DNP
Brand: Delta
Category: PLC and HMI
Catalog status: Request a quotation

Technical specifications

Controller family: Delta AH
Module function: PLC CPU with DNP3
Local I/O capacity: 2304 points maximum; system capacity, not onboard I/O
Program capacity: 192k steps
Data registers: D: 96k words; L: 96k words; B: 2048k words reserved for function blocks
Maximum function blocks: 2048
Maximum extension backplanes: 3
LD instruction execution time: 0.02 microseconds
Internal power consumption: 2.9 W
Serial communication ports: 1 x RS-232 / RS-422 / RS-485 multi-mode
Communication interface: 100 Mbps Ethernet; Mini-USB programming
Protocols: DNP3; Modbus RTU/ASCII; Modbus TCP
SD card capacity: 32 GB maximum
Dimensions H x W x D: 110 x 40 x 103 mm
Document pages: PDF 22, 38
Current lifecycle status: Not established by historical catalogue; confirm separately

Manufacturer technical catalog · Delta AH catalogue; exact model technical/ordering table, PDF 22, 38 · en · PDF · DELTA_IA-PLC_AH_C_EN_20210811Manufacturer source: Delta · Model explicitly covered in family document · Covered models: AHCPU521-DNP · Checked: 2026-10-22Official manufacturer source

This sheet provides a quick technical summary. For design, installation and final selection, review the latest official manufacturer documentation and verify the complete part number.