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ABB AC 800M 3BSE036352 Controller Hardware Product Guide System Version 5.1

From: | Author:Wang | Time :2025-04-14 | 94 visit: | Share:

ABB AC 800M 3BSE036352 Controller Hardware Product Guide System Version 5.1

Functional Description

Processor Unit: Divided into two types: PM8xx (except PM891), which consists of a processor unit and a TP830 baseboard with ports such as Ethernet and serial ports, and supports connection to the S800 I/O unit; and the PM891, which is a monolithic unit with stronger performance and unique redundant links and interfaces. Some processor units support redundant configurations with a switchover time of less than 10ms.


Communication: By adding communication units to the CEX bus, the number of ports and types of protocols can be expanded to support a variety of field buses and communication protocols, such as PROFIBUS DP, FOUNDATION Fieldbus, etc., to achieve connection with remote I/O, field instruments and other devices.

Battery Backup: There are two types of backup methods, internal battery (except PM891) and external battery (SB821, SB822), which are used to supply power to RAM and real-time clock in case of power failure.

Power supply: The power supply unit (SD83x) converts AC power to 24V DC power and supports redundant configurations. The processor unit has an internal power reserve to cope with short-term power failures. Power can also be supplied from an external 24V DC source, but voltage stability should be taken into account.

PM891K01 - Controllers > AC 800M Controllers - ABB Process Automation

I/O system: support a variety of I/O system connection methods, such as S100 I/O, S800 I/O, S900 I/O, etc., through different communication interfaces and protocols.S800 I/O supports hot configuration, redundancy and HART routing and other functions.

Drive system: ABB standard and customised drives can be connected to the AC 800M in a variety of ways, such as optical ModuleBus, PROFIBUS DP, etc. The CI858 DriveBus interface can control up to 24 drives.


Software Components: The software used with the AC 800M controller is the control software, which includes hardware functions, firmware functions, and applications. Firmware needs to be loaded and applications downloaded through the Control Builder interface, and the firmware version of the CPU and other hardware units should be checked before installation.

Hardware components: Introduction to the hardware components, such as the composition and functions of the processor units (PM8xx, PM891) in different configurations; CEX bus interconnection unit (BC810) for improved communication reliability; characteristics and parameters of the various communication interfaces (PROFIBUS DP, RS-232C, etc.); types of battery back-up components and their use; power supply components (SD83x, SS832); and the power supply components (SD83x, SS832). SD83x, SS832) specifications and functions.

Mechanical Design: Examples of cabinet design are provided, showing how controllers, power supply units, etc. are configured and installed in the cabinet. It is emphasised that a certain amount of space needs to be reserved above and below the equipment in order to ensure ventilation and cooling.

Technical data and performance: Performance data of the processor units (PM8xx, PM891) are given, including CPU model, memory, communication speed, etc.; technical parameters and performance indexes of each communication interface unit, battery back-up unit, power supply components, etc.; certification and environmental adaptability of the products are also introduced.


Technical specification parameters

Processor Unit

CPU performance: PM851/PM851A/PM856/PM856A/PM860/PM860A/PM861 adopts MPC860 microprocessor, running frequency 48MHz; PM864/PM865 adopts MPC862 microprocessor, running frequency 96MHz; PM866 adopts MPC866 microprocessor, running frequency 133MHz; PM891 adopts MPC8270 microprocessor, running frequency 450MHz. The PM866 uses the MPC866 microprocessor running at 133MHz and the PM891 uses the MPC8270 microprocessor running at 450MHz. different processor units execute applications at different speeds, e.g., the PM860 executes twice as fast as the PM851/PM856.


Memory Configuration: PM851/PM856/PM860 are equipped with 2MB Flash PROM (for firmware storage) and 8MB SDRAM; PM851A has 2MB Flash PROM and 12MB SDRAM; PM856A/PM860A has 2MB Flash PROM and 16MB SDRAM, etc., while PM891 has 16MB Flash PROM and 256MB SDRAM with integrity check. The PM891 has 16MB of Flash PROM and 256MB of DDR2 SDRAM with integrity check.


Port parameters: Ethernet ports (CN1, CN2), only CN1 is available on some models (e.g. PM851/PM851A) at 10Mbit/s (half-duplex), the PM891's CN1+CN2 ports support 10/100Mbit/s; Serial port COM3 (available on some Processor Units) is available at a selectable communication speed of 75 - 19200 baud; COM4 is used for connection to Control Builder, communication speed 9600 baud.


Other parameters: Electrical ModuleBus for 1 S800 I/O basic cluster, up to 12 S800 I/O units, 192 I/O signals in total (PM891 does not have this interface); Optical ModuleBus for 7 S800 I/O clusters (PM851/PM851A only 1), 12 units in each cluster; CEX bus for up to 12 communication interfaces (PM851/PM851A, PM851A, PM851A, PM851A, PM851A, PM851A, PM851A, PM851A, PM851A, PM851A, PM851A). Up to 12 communication interfaces can be connected to the CEX bus (up to 1 for PM851/PM851A).


Communication interface units

PROFIBUS DP interface (CI851, CI854/CI854A): Supports the PROFIBUS DP protocol, with communication speeds of 9.6, 19.2, 93.75, 187.5, 500, 1500, 3000, 6000, 12000 kbit/s and other options, and a bus capacity of up to 32 nodes per segment with galvanic isolation. The CI851 is a DP Master Class I and the CI854/CI854A supports DP-V0 and DP-V1 services.

RS-232C interface (CI853): Provides dual non-isolated RS-232C ports with Hayes modem signals and selectable communication speeds from 75 to 19200 baud for protocols such as Modbus, Siemens 3964R, etc.


Other interfaces: e.g. MasterBus 300 interface (CI855) for connecting the AC 800M to a MasterBus 300 network; S100 I/O interface (CI856) for connecting the S100 I/O, supporting up to 5 I/O racks with 20 I/O units each; FOUNDATION Fieldbus High Speed Ethernet interface (CI860) for connecting the AC 800M to a MasterBus 300 network. The FOUNDATION Fieldbus High Speed Ethernet interface (CI860) supports FF HSE and communication speed of 10/100Mbit/s, etc. Each interface has corresponding parameters in terms of communication speed, number of ports, electrical isolation, status indication, and so on.


Power Supply Unit

SD83x series power supply units: different input voltage ranges, such as SD831 supports AC 100 - 240V or DC 110 - 300V input, the output is 24V DC, and the rated output currents are of different specifications, such as 3A, 5A, 10A, 20A, etc. The power supply units are equipped with soft-start function, and the output voltage is 10V DC, and the output voltage is 10V DC. With soft start function, stable output voltage and LED to indicate whether the output voltage is normal or not.

Voting unit (SS823, SS832): SS823 is used for redundant power output combination, with double over-voltage protection circuits, which can detect short-circuit and open-circuit; SS832 can be directly used for loads below 10A, and two modules are needed for 20A loads, which have specific parameters in rated output current, voltage, power, and so on.


Battery Backup Components

Internal Battery: Located in the processor unit, some models (e.g. PM891) do not have an internal battery and are used to power the RAM and real-time clock in the event of a power failure.

External Battery (SB821, SB822): SB821 is a non-rechargeable Li-ion battery (3.6V 16Ah), the battery memory backup time varies with different processor units, e.g., at least 4 weeks for PM851/PM856/PM860; SB822 is a rechargeable Li-ion battery (3.75V 2.3Ah), which is used in the PM891 and other scenarios requiring long backup time. Other components


Other Components

CEX-Bus Interconnection Unit (BC810): Used to split the CEX bus into two independent segments to improve system availability, with status indicators, 24V DC power input, 50mA typical current consumption and 1.2W power loss.

SM810 and SM811: for intelligent monitoring of the controllers, with memory, status indicators and specific I/O interfaces, current consumption of 160 mA typical, power loss of 3.8 W, hot-plugging support (backup unit in redundant configuration).

ABB DCS PM865 CPU ABB AC800M PLC AC 800M Controller - AoteWell ...



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