ABB PM851 | CPU Module with Ethernet & CompactFlash Storage
Manufacturer: ABB
-
Part Number: PM851
Condition：New with Original Package
Product Type: CompactFlash Storage
-
Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB PM851 CPU Module
Overview
The ABB PM851 is a high-performance CPU module in the AC 800M controller family, optimized for ABB 800xA DCS applications.
It provides robust processing power for process control, industrial automation, and safety-critical operations.
This module includes a microprocessor, RAM memory, a real-time clock, and a CompactFlash interface for application storage.
Two Ethernet ports and two serial ports allow flexible communication with controllers, operator stations, and engineering tools.
The PM851 is DIN rail mountable and features ABB’s slide-and-lock mechanism for easy installation.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | PM851 |
| Article Number | 3BSE066485R1 (PM851AK01) |
| Product Type | CPU Module for AC 800M Controller |
| Processor | High-performance microprocessor |
| Clock Frequency | 24 MHz |
| Memory | 12 MB (from 800xA 5.1 FP4) |
| RAM Available for Application | 6.253 MB |
| Flash Memory | Yes |
| Ethernet Ports | 2 × RJ45 (CN1, CN2 — only CN1 usable) |
| Serial Ports | 2 × RJ45 (COM3: RS-232C, COM4: isolated) |
| Real-Time Clock | Yes |
| LED Indicators | Yes |
| INIT Push Button | Yes |
| CompactFlash Interface | Yes |
| Mounting Type | DIN rail (slide & lock mechanism) |
| System Compatibility | ABB 800xA DCS, AC 800M platform |
| Redundancy Support | No redundant Ethernet |
| Certifications | IEC 61508, TÜV, CE |
| Application Areas | Process control, safety systems, industrial automation |
FAQs
Q1: What is the primary function of ABB PM851?
✅ The PM851 CPU module manages real-time control, process automation, and safety-critical operations in 800xA DCS systems.
Q2: How much memory does the PM851 CPU module have?
✅ It provides 12 MB memory, with 6.253 MB available for application programs.
Q3: Which communication ports are available on the PM851?
✅ The module includes two Ethernet ports (only CN1 usable) and two serial ports for flexible connectivity.
Q4: Can the PM851 be mounted in control cabinets?
✅ Yes, it is DIN rail mountable with ABB’s slide-and-lock mechanism for quick installation.