ABB PM857K01 3BSE088385R1 AC 800M High Integrity Processor Unit

Parameter

Specification

Manufacturer

ABB

Model Number

PM857K01

Article Number

3BSE088385R1

Product Family

AC 800M

Product Type

High Integrity processor unit package

Package Configuration

Single processor, non-redundant K01 package

Maximum I/O Signals

128

Processor Type

MPC866

Processor Clock Frequency

96 MHz

Execution Performance

1,000 Boolean operations in 0.17 ms

Total Memory

32 MB

Available Application RAM

22.184 MB

Firmware Flash PROM

18 MB

Application Program Cycle Time

10 ms

Supply Voltage

24 V DC

Permitted Supply Range

19.2–30 V DC

Current Consumption at 24 V DC

210 mA typical; 360 mA maximum

Power Dissipation

5.1 W typical; 8.6 W maximum

Redundant Power-Supply Status Input

Supported

Backup Battery Type

3.6 V lithium

Clock Synchronization

1 ms between AC 800M controllers using CNCP

Event Queue per OPC Client

Maximum 3,000 events

OPC Event Transfer Rate

36–86 events per second

OPC Data Message Transfer Rate

113–143 messages per second

CEX-Bus Communication Modules

Maximum 12

Maximum CEX-Bus Supply Current

2.4 A

ModuleBus Clusters with Single CPU

1 electrical and 7 optical clusters

ModuleBus Module Capacity

Maximum 96 modules with a single PM857

Effective PM857 I/O Limit

Maximum 128 I/O signals in total

ModuleBus Scan Rate

0–100 ms, depending on the I/O configuration

Electrical ModuleBus 24 V Supply Current

Maximum 1.0 A

Real-Time Clock Stability

100 ppm, approximately 1 hour per year

Operating Temperature

0 to +55°C

Storage Temperature

−40 to +70°C

Relative Humidity

5–95%, non-condensing

Application Area

Typical Use

Small High Integrity Control Systems

PM857K01 is suitable for High Integrity applications that remain within its 128-I/O-signal limit. The complete architecture requires an SM812 module, compatible software and engineering according to ABB’s applicable instructions.

Equipment Shutdown and Interlocking

The processor can execute permissives, protective sequences and coordinated shutdown logic for individual machines or compact process units. Engineers must account for the 10 ms application cycle and the response times of connected I/O and field equipment.

Burner and Combustion Control

PM857K01 can form part of a properly engineered burner or combustion-control architecture where the required signal count fits within the controller limit. The final configuration must include the necessary High Integrity hardware and software components.

Packaged Process Units

The controller can be applied to skids and packaged systems with a defined number of process and protective signals. Its compact DIN-rail format supports installation in localized control cabinets.

Distributed S800 I/O Systems

Electrical and optical ModuleBus connections allow S800 I/O to be distributed between local and remote cabinets. Although ModuleBus can support multiple modules, the PM857 application remains limited to 128 I/O signals in total.