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ABB · INDUSTRIAL AUTOMATION
PM891
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EXACT-MATCH CHECK
MODEL · CODE · REVISION · SYSTEM
Confirm the complete identity before replacement.
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| PM891 executes AC 800M control applications and coordinates communication with control networks, CEX-bus modules and optical Modulebus I/O. It supports redundant controller arrangements and provides two Ethernet channels for the control network. | Brand: ABB Model: PM891 Order code: 3BSE053240R1 Category: AC 800M Processor Module |
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◈ Installed Role
High-performance AC 800M CPU for deterministic process control, controller redundancy and System 800xA integration. |
⌁ Integration
System identity, revision and connected hardware define the correct replacement path. |
◎ Buyer Check
Send the complete code, revision, quantity, condition requirement and destination. |
Responsive support for scarce automation parts, urgent dispatch and international delivery coordination.
| 1 | Do not order the CPU-module code when the installation requires a complete PM891K01 or redundant PM891K02 package. |
| 2 | Confirm the installed System 800xA and Control Builder release before replacement. |
| 3 | Back up the control application and record firmware and hardware revisions before removing the CPU. |
| 4 | Verify Ethernet, CEX-bus, optical Modulebus and redundancy connections before startup. |
| 01 |
Is PM891 3BSE053240R1 the same as PM891K01?
No. 3BSE053240R1 identifies the CPU module; PM891K01 is a processor-unit kit with order code 3BSE053241R1.
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| 02 |
Can PM891 operate in a redundant controller pair?
Yes. CPU redundancy is supported, with a stated maximum switch-over time of 10 ms when correctly engineered.
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| 03 |
Does PM891 support electrical Modulebus?
No. PM891 uses optical Modulebus; electrical Modulebus is not supported by this CPU.
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| 04 |
What must be matched when replacing PM891?
Match the exact order code, installed hardware revision, firmware, engineering-system version, base arrangement and redundancy role.
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| 05 |
How much application memory is available?
The CPU has 256 MB RAM, with 208.985 MB stated as available for the application.
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