ABB PM867 3BSE076356R1 AC 800M High-Integrity Processor Unit

Configured for high-integrity and safety-related process control in ABB System 800xA platforms, the ABB PM867 3BSE076356R1 (PM867 High-Integrity Processor Unit) provides direct physical/electrical execution across safety critical loops. The module features an MPC866 microprocessor running at 133 MHz with 64 MB of system RAM, executing instructions at approximately 0.09 ms per 1,000 Boolean operations. Hardware connectivity includes dual RJ45 Ethernet interfaces, two RS-232C serial ports, a local ModuleBus interface, and a CEX-Bus extension port to support S800 I/O and safety-certified communications up to SIL 3 ratings.

Suffix Breakdown & Model Matrix

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Flash Compatibility

The high-integrity execution architecture routes process safety data across internal backplane buses while maintaining strict deterministic timing. Integrated ModuleBus and CEX-Bus interface controllers deliver stable backplane bus communication velocity across attached S800 High Integrity I/O clusters, supplying up to 2.4 A to CEX-Bus modules. The onboard non-volatile firmware storage enforces strict firmware flash compatibility checking via ABB 800xA Control Builder, preventing execution of unverified or mismatched safety application logic across the system platform.

Frequently Asked Questions

Q: What additional hardware is required to achieve a SIL 3 safety rating with the PM867 processor?

A: Achieving SIL 3 safety compliance requires pairing the PM867 processor unit with an SM812 safety module along with SIL 3-certified software application configurations and S800 High Integrity I/O.

Q: How is application data retained in RAM when main power is disconnected?

A: A 3.6 V lithium backup battery included in the package supplies continuous backup power to the onboard RAM, maintaining approximately 46.559 MB of application data during main 24 VDC power outages.

Field Installation Guidelines

Mount the TP830 baseplate vertically onto a standard 35 mm DIN rail inside an IP54 or higher protective industrial enclosure. Ensure at least 50 mm of vertical clearance above and below the assembly to allow natural convection airflow across the cooling vents. Secure the TB807 ModuleBus terminator, TB850 CEX-Bus terminator, and TB852 RCU-Link terminator into their designated backplane ports to prevent signal reflection errors. Connect the primary 24 VDC nominal power lines using shielded conductors, attaching the drain wires directly to the main functional grounding bar of the enclosure.