ABB PM858 | 3BSE093350R1 | Processor Unit

Description

Product Specifications & Datasheet

• Brand: ABB
• Model: PM858 (3BSE093350R1)
• Series: AC 800M Controller Family
• Product Name: Processor Unit / Central Processing Unit
• Place of Origin: Sweden
• Lifecycle Status: Active / Industrial Automation Hardware
• Dimensions: 135 mm x 110 mm x 105 mm
• Weight: 0.70 kg
• Origin Country: Sweden
• Power Rating: 24V DC (Powered via CEX-Bus / Baseplate)

Operating Procedures & Usage Guidelines

• Pre-Installation Check: Ensure the control system baseplate is powered off and inspect the module connector pins for cleanliness and alignment.
• Mounting: Carefully guide the processor unit onto the designated slot on the DIN rail and secure it firmly onto the ABB baseplate.
• Memory & Battery: Install or check the backup battery unit and secure the CompactFlash memory card containing the control project if applicable.
• Power-Up & Boot: Apply power to the system and monitor the front-panel LED indicators (such as Run, Error, and Battery) to verify normal startup and firmware execution.

Emergency Shutdown Operation

• Master Power Disconnection: Trip the primary power distribution breaker supplying the controller cabinet to perform an immediate emergency shutdown.
• Safe State Transition: Ensure connected I/O safety loops and actuators drop to their pre-configured safe states upon loss of controller processing power.

Troubleshooting & Common Issues

• Fault LED Illuminated: Connect via the engineering station (Control Builder) to read diagnostic logs and identify specific software or hardware faults.
• Communication Failure: Check the Ethernet and CEX-Bus connections to ensure local control network links and peer-to-peer communications are intact.
• Processor Overheating: Verify that cabinet cooling fans are operational and that ambient temperatures surrounding the controller rack remain within specified limits.

Routine Maintenance & Care

• Battery Replacement: Periodically inspect and replace the internal backup battery according to the manufacturer schedule to preserve RAM data during power losses.
• Firmware Management: Back up project files before performing any scheduled firmware upgrades or system configuration changes.
• Dust Control: Clean cabinet air filters regularly to prevent dust accumulation on the processor cooling vents.

Frequently Asked Questions (Q&A)

• Q: What is the role of the ABB PM858 processor in a control system?
  • A: It executes the user control logic, coordinates communication across modules, and manages process data within the AC 800M automation architecture.
• Q: Is the PM858 processor suitable for redundant setups?
  • A: Yes, it supports CPU redundancy configurations to ensure high availability in critical industrial processes.
• Q: How do I check the operational status of the unit?
  • A: Monitor the status LED indicators on the front faceplate and review diagnostics inside the engineering software environment.