Product Overview of the PM866AK01 CPU Board

The PM866AK01 (article number 3BSE076939R1) is a powerful CPU board. Specifically, ABB designed this module for the AC 800M controller family. The board contains a microprocessor and RAM memory. Additionally, it includes a real-time clock and LED indicators. An INIT push button and CompactFlash interface are also present. Consequently, this CPU board offers complete standalone functionality.

Processor and Memory Specifications

The processor type is MPC866 running at 133 MHz. For performance, it reaches 0.09 ms for 1,000 boolean operations. The memory includes 64 MB RAM in total. More specifically, 51.389 MB of RAM is available for applications. Flash memory is included for program storage. Furthermore, flash PROM for firmware stores 4 MB. Thus, the PM866AK01 handles complex automation tasks efficiently.

Power Supply and Electrical Characteristics

The PM866AK01 requires a 24V DC power supply (19.2V to 30V range). Typically, power consumption is 210 mA at 24V. However, maximum consumption reaches 360 mA. Power dissipation is typically 5.1 watts. In contrast, maximum dissipation goes up to 8.6 watts. Moreover, a redundant power supply status input is provided. The built-in backup battery is Lithium 3.6V. As a result, the controller maintains data during power interruptions.

Redundancy and High Availability Features

The PM866AK01 supports CPU redundancy for higher availability. Specifically, redundancy covers CPU, CEX-Bus, communication interfaces, and S800 I/O. The switchover time in redundant configuration is max 10 ms. Therefore, this ensures seamless failover for critical processes. For clarity, this specific model does not include High Integrity certification. Nevertheless, it delivers excellent reliability for most industrial applications.

Programming and Application Capacity

The PM866AK01 runs up to 32 applications per controller. In addition, each application supports 64 programs. Similarly, each application handles 128 diagrams. The controller manages 32 tasks in total. Furthermore, there are 32 different cycle times available. Cycle time per application program can go down to 1 ms. Hence, this makes the controller suitable for fast automation tasks.

Communication Interfaces and Network Ports

The base plate provides two RJ45 Ethernet ports (CN1, CN2). Specifically, these connect to the Control Network. The Ethernet interface runs at 10 Mbit/s per IEEE 802.3. Moreover, Control Network protocols include MMS and IAC. Additionally, two RJ45 serial ports (COM3, COM4) are available.

Serial Port Details:

• COM3: RS-232C with modem control signals, not opto-isolated

• COM4: Isolated RS-232C for configuration tool connection

The recommended Control Network backbone is 100 Mbit/s switched Ethernet. For synchronization, clock reaches 1 ms between AC 800M controllers using CNCP protocol.

CEX Bus and ModuleBus Expansion

The PM866AK01 supports up to 12 communication modules on the CEX bus. Consequently, the CEX bus supply current max is 2.4 A. The CEX bus can be sectioned using a pair of BC810 or BC820 modules.

ModuleBus I/O Capacity:

• Non-redundant CPU: 1 electrical + 7 optical I/O clusters

• Redundant CPU: 0 electrical + 7 optical I/O clusters

• Max I/O modules with single PM866: 96 modules

• Max I/O modules with redundant PM866: 84 modules

ModuleBus scan rate ranges from 0 to 100 ms. Specifically, the actual time depends on the number of I/O modules connected.

Environmental Specifications and Certifications

Operating temperature ranges from +5°C to +55°C. In comparison, storage temperature spans –40°C to +70°C. Temperature changes are limited to 3°C per minute. Relative humidity is 5% to 95% non-condensing. As a result, the protection class is IP20 per EN 60529.

Key Certifications:

• ISA Secure certified

• CE Mark approved

• Marine certificates: DNV-GL (plus ABS, BV, LR)

• Hazardous location: UL 60079-15, cULus Class 1 Zone 2

• RoHS and WEEE compliant

The PM866AK01 also holds full EMC certification. For emission and immunity, it follows EN 61000-6-4 and EN 61000-6-2. Additionally, corrosion protection meets G3 compliant to ISA 71.04.

Physical Dimensions and Mounting Guide

Dimensions:

• Width: 119 mm (4.7 inches)

• Height: 186 mm (7.3 inches)

• Depth: 135 mm (5.3 inches)

• Weight: 1200 g (2.6 lbs) including base plate

Installation Steps for the PM866AK01:

Step 1: Mount the TP830 base plate on a DIN rail. Then, use the unique slide and lock mechanism for secure attachment.

Step 2: Verify the Ethernet address label on the base plate. Consequently, this provides a unique hardware identity for your CPU.

Step 3: Attach the PM866AK01 CPU board to the base plate. Ensure proper alignment of all connectors.

Step 4: Connect the 24V DC power supply to the base plate terminals. After that, verify voltage stays within 19.2V to 30V range.

Step 5: Wire the two Ethernet ports (CN1, CN2) to your Control Network. Use standard RJ45 cables with 10 Mbit/s support.

Step 6: Connect a configuration tool to COM4 port if needed. Finally, use 800xA Control Builder software for configuration.

Package Contents

The box includes the following items:

• One PM866AK01 CPU board (article 3BSE076939R1)

• One TP830 base plate with pre-attached Ethernet address label

• One lithium backup battery (3.6V, pre-installed)

• One quick start installation guide

• One CompactFlash memory card (blank)

Frequently Asked Questions (FAQ)

Question 1: What is the difference between PM866 and PM866AK01?

Answer: The PM866AK01 is the updated version with article number 3BSE076939R1. Specifically, it includes similar specifications but with full ISA Secure certification.

Question 2: Does the PM866AK01 support CPU redundancy?

Answer: Yes, the PM866AK01 supports CPU redundancy for higher availability. Therefore, the switchover time is max 10 ms for seamless failover.

Question 3: How many I/O modules can I connect to this controller?

Answer: A single PM866AK01 supports up to 96 I/O modules on ModuleBus. However, in redundant configuration, it supports up to 84 modules.

Question 4: What software do I need to configure this CPU board?

Answer: You need ABB 800xA Control Builder software. More specifically, this tool connects via the isolated COM4 serial port.

Question 5: Is the PM866AK01 approved for hazardous locations?

Answer: Yes, the PM866AK01 holds cULus Class 1 Zone 2 approval. For this reason, it is certified for hazardous locations per UL 60079-15.