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| Model Number : | PM891K02 |
| Brand Name : | ABB |
ABB AC 800M Controller Hardware
A factory-defined redundant PM891 package with two processor units plus separate data, control and CEX-Bus interconnection cables.
ABB PM891K02, article 3BSE053242R1, is the redundant PM891 processor package for AC 800M. It combines two PM891K01 units with TK850V007, TK855 and TK856 cables. ABB states that BC810K02 is ordered separately when hot replacement is required.
| Model / article number | PM891K02 / 3BSE053242R1 |
|---|---|
| Package configuration | Redundant processor kit |
| Processor type / clock | MPC8270 / 450 MHz |
| Performance, 1,000 Boolean operations | 0.043 ms |
| Memory per processor | 256 MB |
| Redundant switch-over | Maximum 10 ms |
| Power supply | 24 VDC; permitted range 19.2–30 VDC |
| Processor units | 2 × PM891K01 |
|---|---|
| CEX-Bus cable | 1 × TK850V007 CEX-Bus extension cable |
| Redundancy data link | 1 × TK855 RCU Data Link cable |
| Redundancy control link | 1 × TK856 RCU Control Link cable |
| BC810K02 | Not included |
| Hot replacement requirement | ABB states that BC810K02 must be ordered separately to make PM891 processor hot replacement possible |
Connect TK855 and TK856 exactly as documented; the PM891 uses separate data and control redundancy paths.
Both processors must reach the same expansion bus through the specified cable or the engineered BC810 arrangement.
Use optical ModuleBus and two TB840 units. The PM891 has no electrical ModuleBus connection.
Appropriate where the installed BOM calls for the complete redundant package rather than an isolated replacement CPU.
Check both RCU links, firmware alignment, application state and controller diagnostics before testing switch-over.
Confirm that the separately ordered BC810K02 and site procedure are in place; the package alone does not provide ABB hot replacement.
| Built-in backup battery | No |
|---|---|
| Ethernet per processor | 2 × RJ45, 10/100 Mbit/s |
| ModuleBus I/O capacity | Up to 84 modules |
| Dimensions per processor (W × H × D) | 174 × 186 × 94 mm |
| Package weight | 4,000 g |
| Operating temperature | 0 to +55 °C (+32 to +131 °F) |
Commercial supply support, separate from ABB technical documentation.
Part and package checks for planned redundant-controller work.
Part number and visible condition reviewed.
Available testing stated on the quotation.
Protective packing and prompt issue review.
Terms confirmed before the order is placed.
These part numbers are independent purchasing references only. They are not replacements for the product on this page. Compatibility and stock must be confirmed separately for each item.
Two single-processor packages, one TK850V007 CEX-Bus cable, one TK855 data-link cable and one TK856 control-link cable.
No. ABB states that it must be ordered separately when PM891 hot replacement is required.
Use both supplied links: TK855 carries RCU data and TK856 carries RCU control.
Through optical ModuleBus and two TB840 units. The processor has no electrical ModuleBus.
No. Use the approved external battery arrangement where retained-memory backup is required.
Provide the part number, quantity, destination, required date, machine/system model, installed BC810 arrangement, software release and clear labels for both processors.
For a faster technical and commercial check, send the installed-part details before the requested ship date.
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