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

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).