ABB PM891K01, article 3BSE053241R1, is a single AC 800M processor
package for high-performance control, Control Network communication
and optical S800 I/O. It is a self-contained processor unit and
does not use the TP830 baseplate found on other PM8xx families.
Core Specifications
Model / article number
PM891K01 / 3BSE053241R1
Package configuration
Single processor unit
Processor type / clock
MPC8270 / 450 MHz
Performance, 1,000 Boolean operations
0.043 ms
Memory
256 MB
Application program cycle time
Down to 1 ms
Power supply
24 VDC; permitted range 19.2–30 VDC
Network, I/O & Configuration
01Control Network
Use CN1 for a single network. Use CN1 and CN2 when the controller
is engineered for a redundant Control Network.
02S800 I/O
The unit has optical ModuleBus only. It supports seven clusters,
each with up to twelve modules; redundant and non-redundant modules
may be mixed within ABB limits.
03CEX-Bus expansion
Communication interfaces are added on the CEX-Bus. ABB specifies up
to twelve interfaces; BC810 can divide the bus into independent
segments.
Battery & Redundancy Planning
The PM891 has no internal battery. If retained memory requires
battery support, engineer the ABB external battery option and
include its condition in the maintenance plan.
For processor redundancy, ABB uses two separate links: TK855 for
RCU data and TK856 for RCU control. The redundant arrangement also
connects both processors to the same CEX-Bus and uses optical
ModuleBus with two TB840 units for S800 I/O.
K01 identifies the single-processor package. Do not treat a second
loose CPU as a complete redundant conversion without checking the
ABB redundancy cables, CEX-Bus arrangement, I/O connection and
project configuration.
Applications & Fault Scenarios
Controller renewal
A maintenance team may source a verified single-processor package
for an installed PM891 position or for a separately engineered
redundant pair.
Control Network loss
Check CN1/CN2 cabling, switch path, hardware address records and
controller status before replacing the processor.
Application will not load
Compare the installed System 800xA/Control Builder release, CPU
firmware and project hardware definition before another download
attempt.
Additional Specifications
Current consumption at 24 VDC
660 mA typical / 750 mA maximum
External backup option
SB822; ABB states at least 33 hours when fully charged
Ethernet channels / speed
2 × RJ45, 10/100 Mbit/s
ModuleBus I/O capacity
Up to 84 modules
Dimensions (W × H × D)
174 × 186 × 94 mm
Operating temperature
0 to +55 °C (+32 to +131 °F)
Official Documentation
ABB — Compact Product Suite Hardware Selector — PM891K01 Data SheetData sheet dated 2026-02-05 | Article 3BSE053241R1Open official ABB source
ABB — ABB Ability System 800xA 6.1 — AC 800M Controller Hardware
Product Guide3BSE036352-610 A | System version 6.1Open official ABB source
Amikon Service
Commercial supply support, separate from ABB technical
documentation.
Checked. Packed. Ready.
Warehouse handling for planned automation spare shipments.
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.
FAQ
Is PM891K01 a redundant processor package?
No. It is the single-processor package. The hardware supports
redundancy only when a second processor and the specified ABB
links, bus hardware and project configuration are added.
Does PM891K01 use a TP830 baseplate?
No. The processor is a monolithic unit with integrated termination.
How is S800 I/O connected to PM891K01?
Through optical ModuleBus. The verified limit is seven clusters and
a maximum of 84 modules.
Does PM891K01 have an internal backup battery?
No. Use the ABB external battery arrangement when retained-memory
backup is required.
Which service port is available on PM891K01?
COM4 is an isolated RS-232C service interface at 9,600 baud; COM3
is not supported.
What should be included in a PM891K01 RFQ?
Provide the part number, quantity, destination, required date,
machine/system model, installed firmware or System 800xA release,
and clear nameplate photos.
RFQ for PM891K01
For a faster technical and commercial check, send the
installed-part details before the requested ship date.
Amikon Limited specializes in the global supply of industrial
automation module spare parts. The company focuses on well-known international brands covering DCS
systems, robot control systems, and large-scale servo control
systems.
Product scope includes:
➢Distributed Control Systems (DCS)
➢Programmable Logic Controllers (PLC)
➢MOTOROLA MVME industrial modules
➢Industrial communication converters (Anybus / Gateway)
➢Remote I/O and RTU modules
➢Industrial PCs (IPC)
➢Industrial low-frequency display units
➢Human-Machine Interfaces (HMI)
➢Industrial communication interfaces (SCSI 50 / 68 / 80 Pin)
Amikon supplies both new and obsolete / discontinued automation
components. Leveraging long-term industry experience, the company
provides targeted spare parts solutions to support system
continuity and lifecycle extension.
Corporate Development Timeline
◆ 2004
Company founded.
Business established around long-term supply of industrial
automation spare parts, with emphasis on discontinued and obsolete
components.
◆ 2006
First large-scale commercial order completed.
Contract value exceeded USD 500,000.
Initial customer service procedures and quality control standards
implemented.
Workforce expanded to 20+ employees.
◆ 2008
Annual order volume increased by approximately 100%.
Structured recruitment program launched for technical and
management roles.
Talent development and performance incentive mechanisms introduced.
◆ 2010
Employee headcount exceeded 50.
Company relocated to a 700㎡ office facility.
Operational space and customer reception capabilities upgraded.
◆ 2012
First million-dollar project delivered.
Project value: USD 3 million.
Execution across 20+ countries within eight months.
International project management framework established.
Multiple industry certifications obtained.
◆ 2014
Business entered consolidation phase.
Customer retention rate reached 85%.
Three new product lines launched.
Five technology patents registered.
ERP management system implemented.
Internal training system formalized.
◆ 2016
Overseas orders increased by 150% year-on-year.
Two foreign trade departments expanded.
Overseas sales team grew to 30+ staff.
Products supplied to 100+ countries and regions.
International business accounted for 40%+ of total revenue.
◆ 2018
Headquarters relocated to China World Trade Center.
Office area expanded to 1,200㎡.
More than 80% of employees possessed 10+ years of industry
experience.
Sales and product training systems upgraded.
Annual performance increased by approximately 80%.
◆ 2024
20th anniversary year.
Company workforce exceeded 70 employees.
Customers served across 60+ countries and regions.
Strategic planning initiated for next-stage development.
