ABB PM858-C 3BSE093350R1 | AC 800M CPU Processor Module for System 800xA | In Stock

Description

Product Core Brief

• Model: PM858-C
• Order code: 3BSE093350R1
• Brand: ABB
• Series: ABB AC 800M / System 800xA control system family
• Core Function: Central processor module for AC 800M controllers, executing continuous and batch control logic, managing S800 I/O via ModuleBus, and providing Ethernet connectivity for engineering, operator stations, and plant networks.
• Product Type: Processor module / CPU controller
• Key Specs: 24 VDC power supply | 2× RJ45 Ethernet ports | 2× RS-232C serial ports (COM3/COM4) | supports CPU redundancy | CompactFlash card slot | connects to S800 I/O via TP830 baseplate | CEX-bus expansion for fieldbus modules
• Condition: New Original / New Surplus

Key Technical Specifications

• Order code: 3BSE093350R1
• Product designation: PM858-C processor module
• System family: ABB AC 800M / System 800xA
• Power supply: 24 VDC nominal (19.2–30 VDC), supplied via AC 800M base/power unit
• Processor: MPC866, 33 MHz clock frequency
• Memory: 16 MB RAM, with approximately 7.147 MB available for application
• Communication interfaces: 2× RJ45 Ethernet ports (CN1, CN2) for control network; 2× RS-232C serial ports (COM3 with modem control signals, COM4 isolated for configuration tool)
• Fieldbus expansion: Supports PROFIBUS DP, Foundation Fieldbus HSE, Modbus TCP, MasterBus 300 and other protocols via CEX-bus communication interface modules (CI8xx series)
• I/O architecture: No onboard I/O; connects to S800 I/O through ModuleBus on TP830 baseplate, supporting up to 12 S800 I/O modules (192 points) in non-redundant configuration
• Redundancy: Supports CPU redundancy configurations for higher availability, including redundant CPU, CEX-bus, communication interfaces, and S800 I/O
• Storage: CompactFlash card slot for application and data storage
• Mounting: DIN-rail mounting via TP830 baseplate
• Typical applications: Process control, power generation, oil and gas, water treatment, chemical processing, metallurgy, and distributed industrial automation systems
• Note: Exact firmware version, communication module configuration, and system compatibility should be confirmed from the ABB product documentation or the unit nameplate

Product Introduction

The ABB PM858-C 3BSE093350R1 is a processor module designed for the ABB AC 800M control system architecture. It serves as a central processing unit in distributed automation applications, executing deterministic control programs, coordinating I/O data exchange through the TP830 baseplate and S800 I/O modules, and providing Ethernet-based connectivity for plant networks and engineering access.

The PM858-C features an MPC866 processor running at 33 MHz with 16 MB of RAM, of which approximately 7.147 MB is available for application use. The module includes two RJ45 Ethernet ports for control network communication and two RS-232C serial ports, with COM4 isolated for configuration tool connection. A CompactFlash card slot provides non-volatile storage for applications and data, enabling controller recovery after power interruptions without requiring a full download from the engineering station.

The module supports CPU redundancy configurations, allowing two PM858-C units to operate in a hot-standby arrangement for higher system availability. Redundancy extends to CEX-bus communication modules and S800 I/O, providing comprehensive fault tolerance. Fieldbus connectivity such as PROFIBUS DP, Foundation Fieldbus HSE, and Modbus TCP can be added through ABB CI8xx communication interface modules on the CEX-

bus.

This module is not a standalone PLC and must be installed as part of a compatible AC 800M / System 800xA system with a TP830 baseplate. Before replacement, always confirm the existing system configuration, firmware version, communication interface modules, and connected S800 I/O arrangement.

QA & Testing SOP

1. Order code verification: Confirm PM858-C and 3BSE093350R1 on the nameplate.
2. Visual inspection: Check the module housing, Ethernet ports, serial ports, CompactFlash slot, and mounting hardware for damage or corrosion.
3. Power-up test: Install the module into the correct TP830 baseplate position, apply 24 VDC supply, and verify normal start-up without fault indicators.
4. Communication check: Verify Ethernet connectivity on both ports and serial port communication via COM3/COM4.
5. System test: Confirm program download/upload capability, S800 I/O communication, redundancy status if applicable, and stable controller operation within the AC 800M / System 800xA environment.

Installation Pitfalls & Guide

❗ Confirm system compatibility. PM858-C is designed for the ABB AC 800M / System 800xA architecture with TP830 baseplate. It cannot be directly substituted into AC 800F / Freelance or other ABB controller families.

❗ Record existing configuration. Before removal, save the controller program, firmware version, communication module configuration, and baseplate slot assignment.

❗ Verify CompactFlash card. Ensure the CompactFlash card is present and contains the correct application. The card is essential for controller recovery after power loss.

❗ Check redundancy configuration. If the system uses CPU redundancy, confirm that both primary and secondary units are properly configured and synchronized before replacing either module.

❗ Follow proper grounding practices. Ensure correct grounding and shielding to minimize electromagnetic interference in industrial environments.

Replacement steps:

1. Pre-install: Back up the existing controller program, note the firmware version, communication configuration, and slot position.
2. Removal: Follow safe shutdown procedures, disconnect power if required, then remove the processor module.
3. Install: Insert the PM858-C into the correct TP830 baseplate position, verify all connectors, and confirm proper seating.
4. Commissioning: Power up the system, confirm normal startup, verify Ethernet and fieldbus communication, check S800 I/O status, validate redundancy if applicable, and confirm process control operation before returning to production.

Technical FAQ

Is 3BSE093350R1 the correct order code for PM858-C? Yes, 3BSE093350R1 is listed as the order code for the ABB PM858-C processor module. Always confirm the full designation on the existing nameplate.

What system is PM858-C used in? It is designed for the ABB AC 800M control system and integrates with System 800xA environments, using S800 I/O and CEX-bus communication interface modules.

s the same as PM858K01? PM858K01 (3BSE082895R1) is a related variant in the same PM858 family. While both share the PM858 designation, the order codes differ and firmware or feature compatibility should be verified before cross-substitution.

Does PM858-C have onboard I/O? No. PM858-C has no onboard discrete or analog I/O by design. Field I/O is handled through S800 I/O modules connected via the TP830 baseplate ModuleBus.

Can PM858-C be configured for redundancy? Yes. PM858-C supports CPU redundancy configurations for higher availability in critical process applications.

Do you offer price flexibility? Yes. Pricing depends on condition, firmware visibility, quantity, and urgency. New original stock and tested surplus units are quoted separately.

What warranty is included? Typical coverage is 12 months from delivery for functional defects, excluding incorrect installation, firmware mismatch, communication configuration errors, or damage from improper handling. Final terms are confirmed on the quotation.