ABB PM864AK01 3BSE018161R2 | Processor Module for AC 800M Controllers

Description

Product Introduction

In a high-availability AC 800M setup, the PM864AK01 3BSE018161R2 is the workhorse that keeps the control loop running when the primary processor drops out. This module serves as the central processing unit for the AC 800M family, managing logic execution, network traffic, and I/O scanning. It slots directly into the S800 I/O rack and communicates over the Module Bus.

The standout feature here is the dual RJ45 Ethernet ports, which allow for redundant network topologies without needing an external switch. In my experience, this hardware redundancy cuts network single points of failure significantly. It packs 16 MB of RAM, which handles complex control strategies and large-scale data logging better than the older PM861 models.

ABB-PM864AK01-eA-3BSE018161R2

Key Technical Specifications

Compatibility & Replacement Matrix

• PM861AK01 3BSE018157R1 → PM864AK01 3BSE018161R2 : Direct — Same footprint and electrical interface; firmware may need alignment.
• PM864AK01 3BSE018161R1 → PM864AK01 3BSE018161R2 : Direct — Hardware revision update; R2 is backward compatible with R1 projects.
• PM860AK01 3BSE018100R1 → PM864AK01 3BSE018161R2 : Needs Adaptation — Requires firmware check and potential Control Builder M project recompile.
• PM866AK01 3BSE018168R1 → : Incompatible — Different processor architecture and power profile; do not mix in the same redundant pair.

Quality Inspection & SOP Transparency

We don’t just look at the box and ship it. Here is the actual procedure our technicians follow for every 3BSE018161R2 that leaves the warehouse.

1. Incoming Inspection: We start by tracing the serial number against ABB’s manufacturing database to confirm it’s not a reported theft or RMA return. Visually, we check for the tell-tale yellowing of older plastics — if the module looks sun-bleached, we reject it. The label must be crisp, with no smudged barcodes.
2. Live Functional Test: The unit goes into a live AC 800M rack (TU845 baseplate). We power it up and watch the LEDs: the “Run” LED should be solid green, not flashing. We then establish a Control Builder M connection and verify we can read the CPU status without timeouts.
3. I/O and Comms Check: We simulate a full rack load by connecting a TU830 I/O baseplate and cycling digital outputs while monitoring the module bus traffic. For Ethernet, we ping the CPU from a laptop on the same subnet; packet loss must be 0%.
4. Firmware Verification: We read the firmware version directly from the CPU properties. If it’s running anything older than v5.1, we flag it for potential upgrade — though we don’t upgrade without customer approval, since that can break backward compatibility.
5. Final QC & Packaging: After a 24-hour burn-in at 50 °C (we use a calibrated thermal chamber), we log the max temperature rise. If it stays under 45 °C, it passes. The unit is then sealed in an anti-static bag with a desiccant pack and labeled with the test date and technician ID.

ABB-PM864AK01-eA-3BSE018161R2

Common Replacement Pitfalls

1. Firmware Revision Mismatch: This is the big one. I once swapped a into a system running Control Builder M v6.0, only to find the new CPU was on firmware v4.2. The controller wouldn’t go into “Run” mode. Always check your project’s firmware requirement before ordering.
2. DIP Switch Settings: The redundancy DIP switches on the front are easy to miss. If you’re replacing one half of a redundant pair, the new module’s switches must match the existing one exactly. A single switch in the wrong position and you’ll spend hours chasing a “Sync Failed” error.
3. Ethernet Port Configuration: The has two RJ45 ports, but they aren’t always configured the same way. Some sites use Port 1 for Control Net and Port 2 for Plant Net. Double-check your network diagram before plugging in cables.
4. Module Bus Termination: When you pull a CPU, the module bus termination can get disturbed. Before powering up the new unit, double-check that the termination resistors on the adjacent modules are set correctly. A floating bus will cause intermittent communication errors.
5. ESD Damage: It sounds basic, but I’ve seen it happen. The is sensitive to static discharge. Always wear a grounded wrist strap when handling the module — especially in dry winter months.

Get these five right and you’ll cut rework time by most of the afternoon.

FAQ

Can I just swap this in directly?
It depends. If you’re replacing a with another and the firmware versions match, yes — it’s a direct swap. But if you’re moving from a PM861, you’ll need to verify the rack power budget first. The PM864 draws slightly more current on the 24 V rail.

My system runs AC 800M V6.0 — will this module work?
Yes, but with a caveat. The is compatible with AC 800M V6.0, but you’ll likely need to upgrade the CPU firmware to at least v5.1 to avoid communication issues with newer I/O modules. We recommend confirming the exact firmware version with your system integrator before installation.

Is this a genuine ABB part or a refurb?
This is a new original unit — factory sealed, never installed. We source directly from ABB’s authorized distribution network, so the serial number will register in their system. We don’t sell refurbs or “pulled” units.

The main difference is memory and processing power. The PM864 has 16 MB of RAM vs. the PM861’s 8 MB, and a faster clock speed (133 MHz vs. 100 MHz). Physically, they’re identical — same connectors, same mounting. If your project is growing, the PM864 gives you more headroom.

Do you offer a warranty?
Yes, 1 year from the date of shipment. It covers manufacturing defects and DOA (dead on arrival) issues. It doesn’t cover damage from improper installation — like forgetting the ESD strap — so please be careful.