Overview
The ABB PM856A is a high-performance CPU module within the AC 800M controller family, engineered for advanced process control, high-availability automation, and large-scale distributed systems. It executes complex control algorithms, handles extensive I/O networks, and maintains reliable operation in demanding industrial environments such as power generation, petrochemicals, and manufacturing.
The controller consists of a CPU board with a high-speed processor, RAM memory, real-time clock, LED indicators, CompactFlash interface, and an INIT push button. The base plate provides dual Ethernet ports (CN1, CN2) for Control Network communication and two serial ports (COM3 RS-232C with modem signals and COM4 isolated), enabling flexible integration with sensors, engineering tools, and third-party devices.
Technical Data
| Specification | Description |
|---|---|
| Product Type | AC 800M Controller CPU Module PM856A |
Typical Applications
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Process industries: Supervising chemical, petrochemical, pharmaceutical, and oil & gas processes via large distributed I/O networks.
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Power generation: Controlling turbines, boilers, auxiliary systems, and excitation platforms with high reliability.
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Water treatment: Managing pumps, mixers, valves, and water quality instrumentation.
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Manufacturing automation: Coordinating production lines, machining cells, and robotics.
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Infrastructure systems: Supporting building automation, HVAC, energy management, and utilities.
Example: In a major refinery, the PM856A communicates with numerous local and remote I/O stations to monitor and control thousands of process signals across multiple production units.
FAQ
Q1: What is the ABB PM856A used for?
A1: It is a CPU controller module for the AC 800M system, responsible for executing control logic and managing communication with local and remote I/O.
Q2: How many I/O stations can it connect to?
A2: Up to 8 local I/O stations (non-redundant) and up to 98 remote Profibus DP stations.
Q3: What communication interfaces are available?
A3: Two Ethernet ports (CN1, CN2) and two serial ports (COM3 RS-232C with modem signals, COM4 isolated).
Q4: How is the PM856A installed?
A4: It mounts on a DIN-rail using a slide-and-lock mechanism for secure and tool-free installation.
Q5: Does each controller have a unique identity?
A5: Yes, each base plate includes a unique Ethernet MAC address for system identification and configuration.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
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