ABB PM864AK01 AC 800M Processor Unit Technical Specifications

ABB PM864AK01 Processor Module

Configured for deterministic control logic execution in System 800xA network platforms, the ABB PM864AK01 (PM864A Processor Unit) provides direct physical and electrical processing of control applications.

Suffix Breakdown & Model Matrix

The PM864AK01 (3BSE018161R1) is supplied as a complete processor package. The kit includes the PM864A CPU, TP830 baseplate (115 mm width), TB850 CEX-bus terminator, TB807 ModuleBus terminator, TB852 RCU-Link terminator, and the 4943013-6 memory backup battery.

Hardware Specifications

Profinet and Deterministic Network Communication

The PM864AK01 integrates into the AC 800M controller architecture, supporting deterministic communication across the backplane bus. The module facilitates high-speed data exchange with I/O subsystems via the ModuleBus and CEX-bus interfaces. Users must ensure that firmware flash compatibility is maintained across all redundant controller pairs to prevent synchronization errors during active operation. The processor supports deterministic network cycles compliant with Profinet and Ethernet/IP protocols, allowing for precise timing of control loops within the distributed control system.

Frequently Asked Questions

Q: Can the PM864AK01 be replaced while the system is powered on?

A: Hot-swapping is permitted only when the module is part of a configured redundant pair. You must ensure the secondary module is in the 'Standby' state before removing the failed primary unit to maintain continuous control execution.

Q: What is the purpose of the included TB852 RCU-Link terminator?

A: The TB852 serves as a bus terminator for the Redundancy Control Unit (RCU) link. It is mandatory for maintaining signal integrity on the link between redundant CPUs to prevent reflection interference.

Field Installation Guidelines

1. Baseplate Mounting: Secure the TP830 baseplate to a grounded DIN-rail or mounting plate. Ensure the mounting surface is level to prevent mechanical stress on the backplane connectors.
2. Termination: Install the provided TB850, TB807, and TB852 terminators at the physical ends of their respective buses (CEX, ModuleBus, and RCU-Link). Failure to install these terminators results in unstable communication and cyclic redundancy check (CRC) errors.
3. Battery Insertion: Install the 4943013-6 memory backup battery into the PM864A housing prior to powering up the unit to ensure the retention of volatile memory during power cycles.
4. Wiring: Route all power supply cabling (24 VDC) separately from communication signal wires to minimize electromagnetic interference (EMI) coupling.