ABB PM866AK02 3BSE081637R1 Redundant Processor Unit

Product Overview

The ABB PM866AK02 (3BSE081637R1) is a redundant Processor Unit Kit for the AC 800M controller family. It includes two PM866A processors with baseplates and redundancy cabling, enabling hot-standby CPU redundancy for mission-critical applications.

Key Specifications

• Manufacturer: ABB
• Part Number: PM866AK02 (3BSE081637R1)
• Product Type: AC 800M Redundant Processor Unit Kit
• CPU: 2× MPC866 @ 133 MHz
• Memory: 64 MB SDRAM per CPU
• Performance: 0.09 ms per 1000 boolean operations; 1.4× PM864A
• Redundancy: Hot-standby CPU, CEX-Bus, S800 I/O
• Switchover Time: Max 10 ms (Primary to Backup)
• System: AC 800M / System 800xA
• Kit Includes: 2× PM866A CPU, 2× TP830 Baseplate (115mm), 2× TB807 ModuleBus Terminator, 1× TK850 CEX-Bus Expansion Cable, 1× TK851 RCU-Link Cable, 2× Battery for memory backup (4943013-6)
• Power Supply: 24 V DC (19.2–30 V DC)
• Dimensions: W 119 × H 186 × D 135 mm (per unit)
• Weight: 2800 g (package)

Applications

• Mission-critical process control
• High-availability power generation
• Pharmaceutical batch operations

FAQ

Q: What cables are required for redundancy?
A: The kit includes TK851 RCU-Link Cable. TK855/TK856 fiber-optic RCU links are optional alternatives.

Q: Does redundancy affect I/O capacity?
A: In redundant configuration, the electrical ModuleBus is not available; use optical ModuleBus or CEX-Bus-connected I/O interfaces.

Q: Can I upgrade from PM866AK01 to redundant?
A: Yes, by adding a second PM866AK01 kit and the appropriate RCU link cables.

Installation Guide

1. Mount both TP830 baseplates side-by-side on DIN rail.
2. Install PM866A processors on each baseplate.
3. Connect TK851 RCU-Link cable between the two CPUs.
4. Wire independent 24 V DC power feeds to each baseplate.
5. Connect CN1/CN2 Ethernet for control network redundancy.
6. Configure redundancy in Control Builder M and synchronize CPUs.

Selection Tips

• Order PM866AK02 for new redundant installations.
• Ensure cabinet width accommodates two processor units plus CEX-Bus modules.
• Use BC810/BC820 to section the CEX-Bus for higher availability.
• Verify all I/O modules support redundant configuration.