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Built-in RS-232/422/485 multi-mode communication port x 1
RS-232:115.2 Kbps / RS-422 / 485:921.6 Kbps
Built-in Ethernet communication port (100 Mbps)
Built-in SD card slot (maximum capacity:
2 GB for AHCPU5_0 or 32 GB for AHCPU5_1)
Built-in Mini USB programming communication port
With system diagnosis/status indicator/online programming and debugging functions
Support PLC Link/Ether Link automatic data exchange function
Support Modbus RTU/ASCII, Modbus TCP
Support DNP3 protocol (AHCPU521-DNP only)
EtherNet/IP support (AHCPU5_1-EN only)
-Scanner and Adapter modes
-support for I/O connections and explicit messages
-Number of connections: TCP = 32 ~ 128; CIP = 64 ~ 256
- RPI: 1 ~ 1,000 ms
-250 words/connection
The language LD/SFC/FBD/IL/ST is supported
Support for 256 interrupts
(time/IO/external/low voltage/communication interruption)
2,048 Timer and Counter are supported
Support battery-free data saving
With RTC function (up to 30 days power-off hold)
Support NTP network timing function
The function of WEB/E-Mail/IP Filter is supported
CPU RAM/ROM capacity
AHCPU5_0:32 MB / 8 MB
AHCPU5_1:128 MB / 128 MB
Cpu frequency
AHCPU5_0:133 MHz
AHCPU5_1:800 MHz
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A: Absolutely! We offer a variety of alternative options for this product. Whether it's different colors, sizes, or styles, you can explore the range of alternatives available to find the perfect fit for your needs.
Reviews
- W
William Black
Oct 09, 2025
Delta PLC CPU Module AHCPU521-ENQuick and efficient shipping response!HelpfulUnhelpful - C
Chris Malm
Jun 17, 2025
Delta PLC CPU Module AHCPU521-ENOutstanding service from the seller. The process was simple and delivery was swift.HelpfulUnhelpful - C
Craig Edelman
May 03, 2025
Delta PLC CPU Module AHCPU521-ENI received my order exactly as expected.HelpfulUnhelpful - Z
Zoe
Mar 02, 2025
Delta PLC CPU Module AHCPU521-ENI've had a great experience working with them.HelpfulUnhelpful - M
MYRA POPE
Dec 27, 2024
Delta PLC CPU Module AHCPU521-ENWell-packaged parts, fast delivery, and a perfect fit for a good price.HelpfulUnhelpful - R
Ron Crews
Aug 07, 2024
Delta PLC CPU Module AHCPU521-ENexact part neededHelpfulUnhelpful - A
Anonymous user
Nov 25, 2022
Delta PLC CPU Module AHCPU521-ENAll was ok! No problems whatsoever.HelpfulUnhelpful
Delta PLC CPU Module AHCPU521-EN
✔ In Stock (Can ship in 5-7 days)

Online Support 24/7
12 Months Warranty for New Products
30 Days Money Back Guarantee
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