ABB · PM851AK01
ABB PM851AK01 AC 800M Processor Unit for Compact Control
ABB PM851AK01 AC 800M processor package with PM851A CPU, TP830
baseplate, CEX-Bus and ModuleBus terminators, memory-backup battery
and single-CPU operation.
TypeAC 800M processor unit kit
SystemABB AC 800M / Compact Product Suite
Focus24 MHz, 12 MB, single CPU
BrandABB
PM851AK01 availability, lead time and order review
Send RFQProduct Introduction
PM851AK01 is a single-CPU AC 800M processor package for compact
control applications. ABB supplies the PM851A CPU with the TP830
baseplate, bus terminators and memory-backup battery.
Engineering note: PM851AK01 does not support CPU redundancy. Confirm controller
capacity, one-channel Ethernet design and CEX-Bus needs before
replacing a larger AC 800M processor with this model.
Technical Specifications
Select a category to view its specifications. All categories are
closed by default.
Identification & packageView 6 specificationsHide specifications⌄
| ABB article number | 3BSE066485R1 |
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| Processor | PM851A CPU |
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| Baseplate | TP830, 115 mm |
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| Included terminators | TB850 CEX-Bus and TB807 ModuleBus |
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| Memory backup | Battery 4943013-6 |
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| License | No license included |
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Processor & memoryView 6 specificationsHide specifications⌄
| Clock frequency | 24 MHz |
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| Package memory | 12 MB in current ABB product catalogs |
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| Processor type | MPC860 |
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| Flash storage for application/data | Yes |
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| 1000 Boolean operations | 0.46 ms |
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| Application-program cycle | Down to 1 ms |
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Integration & capacityView 6 specificationsHide specifications⌄
| CPU redundancy | No |
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| Ethernet channels | 1 × 10 Mbit/s RJ45 |
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| Communication modules on CEX-Bus | 1 |
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| ModuleBus I/O clusters | 1 electrical + 1 optical |
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| ModuleBus I/O capacity | Maximum 24 I/O modules |
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| High Integrity controller | No |
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Power & sizeView 7 specificationsHide specifications⌄
| Power supply | 24 V DC (19.2–30 V DC), max 5% ripple |
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| 24 V current, typical / max | 180 / 300 mA |
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| Typical power dissipation | 4.32 W |
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| Power reservoir | Internal 5 ms for controlled power-down |
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| Dimensions | 119 × 186 × 135 mm |
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| Weight including base | 1100 g |
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| Protection class | IP20 |
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Compatibility & Replacement
Confirmed package scope. ABB identifies PM851AK01 as a single PM851A processor package for
AC 800M and Compact Product Suite applications.
Capacity boundary. ABB specifies one Ethernet channel, one CEX-Bus communication
module and no CPU redundancy. Confirm the existing project stays
within those limits.
Applications & Fault Scenarios
01Compact AC 800M control
Runs smaller control applications where a single CPU and limited
CEX-Bus expansion meet the engineered capacity.
02Machine and package-unit control
Fits isolated or packaged control duties that do not require a
redundant processor pair.
03Controller not reachable
Check the single Ethernet path, 24 V supply, IP settings and CPU
state; there is no second network channel to mask a path failure.
04CEX-Bus expansion not recognized
Confirm that the project uses no more than the one communication
module supported by PM851A.
05Application exceeds capacity
Compare project memory, I/O count and task load with the PM851A
limits before treating performance symptoms as hardware faults.
AMIKON SUPPORTIndependent spare-parts support
Amikon can review the exact part number, installed system,
quantity, destination and required date before quotation.
Pre-outage checkpoints
- Confirm the project does not require CPU redundancy.
- Record the single Ethernet and CEX-Bus topology.
- Verify application memory and I/O count.
- Back up the project and controller IP settings.
Amikon Supply & Service
Independent multi-brand support for maintenance, outage and
legacy-system requirements.
Order reviewPart number, quantity, destination, required date and system model
checked.
Inspection & testingLabel, condition and serial checks; testing when agreed.
Packing & dispatchProtective export packing and delivery coordination.
DOA, returns, warranty & supportAfter-sales review under the quoted return and warranty terms.
Request for Quotation
- Part Number
- Quantity
- Destination
- Required Date
- Machine / System Model
Multi-brand Spare Parts Also Requested
- VCZBD1100/U
- 5IK40GN-AW2T
- 500F-BOD930
- 12SFC99AA001A
- 1400.050.145
- TJT250100RJ
- 0-396481-1
- 4306737
- 750-602/040-000
- R80031B
- R80031A
- FR-DU08 FR-A800
- 2MB55X1 1 LD
- PC776 40-20-27395
- 44B399885-002/4
- 44B399844-002/4
- 634487G
- STEINER 513102-18758
- P0960BX-0C
- BDG0103
- MDH-L425-D
- TM30050
- TM80125
- CJ2MCPU1122
- TM25020
- FT-35
- 1000X-4
- F3042.UW31.031.Z02.15
- 4116J81
- 137D5195G
These models are listed only as independent sourcing references.
They are not substitutes for PM851AK01. Compatibility,
configuration and stock must be confirmed separately for each item.
PM851AK01 FAQ
What should be checked before ordering ABB PM851AK01 for an
existing AC 800M project?
Match the complete PM851AK01 identification and verify the
installed controller, project and firmware context using the
applicable ABB documentation.
Should a buyer assume that ABB PM851AK01 is a drop-in replacement
for another AC 800M CPU?
No. Replacement and migration relationships must be confirmed
separately for the installed project, hardware package and software
level.
Can current stock, condition and lead time for ABB PM851AK01 be
confirmed from this page?
No. Stock, condition, inspection scope and lead time change by
offer and must be confirmed in the live quotation for ABB
PM851AK01.
What pre-shipment evidence can I request for ABB PM851AK01?
Request clear label, condition and serial-number photos plus the
agreed inspection or testing record for ABB PM851AK01 before
dispatch.
How should I submit an urgent shutdown requirement for ABB
PM851AK01?
Send the exact part number, quantity, destination, required date,
machine or system model and failure context. Priority routing
starts after the ABB PM851AK01 identity is confirmed.
What DOA, return and warranty terms apply to ABB PM851AK01?
They are defined in the quotation. If ABB PM851AK01 arrives DOA or
does not match the purchase order, report the serial number, label,
packaging and fault evidence promptly for after-sales review.
