ABB 3BSE018129R1/PM861 High-Performance AC 800M Processor Module

Product Description:

The ABB PM861 (3BSE018129R1) is a high-performance processor module designed for ABB’s AC 800M distributed control system (DCS) within the 800xA and Advant platforms. Ideal for demanding industrial automation environments, this modular CPU ensures stable real-time control, enhanced communication flexibility, and full system redundancy for critical applications.

Key Technical Features

• Processor Type: MPC860

• Clock Speed: 48 MHz (or 133 MHz depending on model variant)

• Performance: Capable of executing 1000 boolean operations in 0.23 ms

• Memory:

• RAM: 16 MB (7.155 MB available for application use)

• Flash Memory: 2 MB for firmware storage

• Battery-backed RAM for secure data retention

• Built-in lithium battery (3.6 V) with a typical life span of up to 5 years

Communication Interfaces

• Ethernet Ports: 2 × 10 Mbit/s, RJ-45 for network communication

• RS-232C Serial Ports: 2 (one for general communication, one for service tool connection)

• ModuleBus: Supports both electrical and optical interfaces

• CEX Bus: Supports up to 12 CEX modules for scalable system integration

• Control Network Protocols: MMS (Manufacturing Message Service), IAC (Inter Application Communication)

Electrical and Environmental Specifications

• Power Supply: 24 V DC (Range: 19.2 - 30 V DC)

• Power Consumption:

• Typical: 250 mA

• Maximum: 430 mA

• Power Dissipation: 6.0 W (Maximum: 10.3 W)

• Operating Temperature Range: 0°C to +55°C

• Protection Class: IP20 (Suitable for installation in control cabinets)

• Redundant Power Supply: Yes, with backup battery options for reliability

• Real-time Clock Stability: 100 ppm (approximately 1 hour/year)

I/O Capacity and Performance

• Max I/O Capacity:

• Single PM861: Up to 96 I/O modules

• Redundant PM861: Up to 84 I/O modules

• Modulebus Scan Rate: 0 - 100 ms (dependent on I/O count)

• Supply Current on Electrical Modulebus:

• 24 V: Max 1.0 A

• 5 V: Max 1.5 A

Physical and Mechanical Specifications

• Dimensions: 119 × 186 × 135 mm

• Weight: 0.5 kg 

• Mounting: DIN-rail mount, compact design for easy integration into control cabinets

Typical Applications:

• Distributed Control Systems (DCS)

• ABB 800xA / Advant AC 800M systems

• Chemical, Petrochemical, and Power Generation Plants

• Large-scale industrial automation requiring high reliability and redundancy

FAQ:

Q: What redundancy features does the PM861 support?
A: The ABB PM861 supports full redundancy, including CPU, communication interfaces, and the CEX bus, ensuring high system availability in mission-critical applications.

Q: What is the maximum I/O capacity supported by the PM861?
A: The PM861 supports up to 96 I/O modules in a single configuration, and up to 84 modules in a redundant setup.

Q: Can this processor module be used in harsh environmental conditions?
A: Yes, with its IP20 protection class, the PM861 is designed for use in control cabinets, with a wide operating temperature range of 0°C to +55°C.