Overview

ABB PM851AK01 is a central processing unit within the ABB Ability™ System 800xA® hardware family. It features a CPU board that includes the microprocessor and RAM memory, a real-time clock, LED indicators, an INIT push button, and a CompactFlash interface. The base plate of the PM851A controller has two RJ45 Ethernet ports (CN1, CN2) for Control Network connection and two RJ45 serial ports (COM3, COM4). Note that this module restricts Ethernet connection to one port (CN1), eliminating the possibility of redundant Ethernet. COM3 is an RS-232C port with modem control signals, while COM4 is isolated and used for configuration tool connection.

Features and Benefits

• Reliability and Simple Fault Diagnosis Procedures: Ensures system uptime with straightforward troubleshooting capabilities.
• Modularity: Allows for incremental system expansion.
• IP20 Class Protection: Provides protection without needing enclosures.
• Configurable with 800xA Control Builder: Facilitates comprehensive system design and management.
• EMC Certification: Ensures compliance with electromagnetic compatibility standards.
• Standard-Based Hardware: Optimizes communication connectivity with protocols such as Ethernet and PROFIBUS DP.

General Info

• Article Number: 3BSE066485R1 (PM851AK01)
• Redundancy: No
• High Integrity: No
• Clock Frequency: 24 MHz
• Performance: 1000 boolean operations in 0.46 ms
• Memory: 12 MB (from 800xA 5.1 FP4)
• RAM Available for Application: 6.253 MB (from 800xA 5.1 FP4)
• Flash Memory for Storage: Yes

Detailed Data

• Processor Type: MPC860
• Switch Over Time in Red. Config.: NA
• Number of Applications per Controller: 32
• Number of Programs per Application: 64
• Number of Diagrams per Application: 128
• Number of Tasks per Controller: 32
• Number of Different Cycle Times: 32
• Cycle Time per Application Programs: Down to 1 ms
• Flash PROM for Firmware Storage: 2 MB
• Power Supply: 24 V DC (19.2-30 V DC)
• Power Consumption (+24 V typ/max): 180 / 300 mA
• Power Dissipation: 4.32 W (7.2 W max)
• Redundant Power Supply Status Input: Yes
• Built-in Backup Battery: Lithium, 3.6 V
• Clock Synchronization: 1 ms between AC 800M controllers by CNCP protocol
• Event Queue in Controller per OPC Client: Up to 3000 events
• AC 800M Transmission Speed to OPC Server: 36-86 events/sec, 113-143 data messages/sec
• Communication Modules on CEX Bus: 1
• Supply Current on CEX Bus: 2.4 A
• I/O Clusters on Modulebus with Non-Red. CPU: 1 electrical, 1 optical
• I/O Clusters on Modulebus with Red. CPU: NA
• I/O Capacity on Modulebus: Max 24 I/O modules
• Modulebus Scan Rate: 0 - 100 ms (actual time depending on number of I/O modules)
• Supply Current on Electrical Modulebus: 24 V: max 1.0 A, 5 V: max 1.5 A
• Ethernet Channels: 1
• Ethernet Interface: Ethernet (IEEE 802.3), 10 Mbit/s, RJ-45, female (8-pole)
• Control Network Protocol: MMS (Manufacturing Message Service) and IAC (Inter Application Communication)
• Recommended Control Network Backbone: 100 Mbit/s switched Ethernet
• Real-Time Clock Stability: 100 ppm (approx. 1 h/year)
• RS-232C Interface: 2 (one general, 1 for service tool)
• RS-232C Interface (COM3): RS-232C, 75-19 200 baud, RJ-45 female (8-pole), not opto isolated, full RTS-CTS support
• RS-232C Interface (COM4): RS-232C, 9 600 baud, RJ-45 female (8-pole), opto isolated, no RTS-CTS support

Environment and Certification

• Operating Temperature: +5 to +55 °C (+41 to +131 °F)
• Storage Temperature: -40 to +70 °C (-40 to +158 °F)
• Temperature Changes: 3 °C/minutes according to IEC/EN 61131-2
• Pollution Degree: Degree 2 according to IEC/EN 61131-2
• Corrosion Protection: G3 compliant to ISA 71.04
• Relative Humidity: 5 to 95 %, non-condensing
• Emitted Noise: < 55 dB (A)
• Vibration: 10 < f < 50 Hz: 0.0375 mm amplitude, 50 < f < 150 Hz: 0.5 g acceleration, 5 < f < 500 Hz: 0.2 g acceleration
• Rated Isolation Voltage: 50 V
• Dielectric Test Voltage: 500 V a.c.
• Protection Class: IP20 according to EN 60529, IEC 529
• Altitude: 2000 m according to IEC/EN 61131-2
• Emission & Immunity: EN 61000-6-4, EN 61000-6-2
• Environmental Conditions: Industrial
• CE Mark: Yes
• Electrical Safety: EN 50178, IEC 61131-2, UL 61010-1, UL 61010-2-201
• Hazardous Location: cULus Class 1, Zone 2, AEx nA IIC T4, ExnA IIC T4Gc X
• Marine Certificates: ABS, BV, DNV-GL, LR
• TUV Approval: No
• RoHS Compliance: EN 50581:2012
• WEEE Compliance: DIRECTIVE/2012/19/EU

Dimensions and Weight

• Width: 119 mm (4.7 in.)
• Height: 186 mm (7.3 in.)
• Depth: 135 mm (5.3 in.)
• Weight (including base): 1100 g (2.4 lbs)

The ABB PM851AK01 processor module offers a blend of performance, reliability, and modularity, making it a versatile choice for industrial control applications.