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Help CenterABB PM858-C 3BSE093350R1 AC 800M Series CPU Modules
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1. Product Description
ABB PM858-C (Order No.: 3BSE093350R1) is an industrial‑grade high‑performance PLC CPU module belonging to the ABB AC 800M series. As the core processing unit of the Distributed Control System (DCS), it is designed for large‑scale industrial automation and process control applications. It is widely used in power, petrochemical, metallurgical, paper and other industries, performing core functions including logic operation, data processing, command output, equipment interlocking and system management.
The module adopts an advanced multi‑core processor architecture with high speed and strong processing capacity, supporting multi‑task parallel execution. It integrates rich communication interfaces and standard protocols, enabling seamless compatibility with ABB AC 800M systems and third‑party industrial automation equipment for high‑speed data exchange. It features high reliability, strong anti‑interference and flexible scalability, supports hot‑swap and redundant configuration, and adapts to harsh industrial environments. It is a core control component for new construction, expansion and retrofit of industrial automation systems, effectively improving control accuracy and operational stability.
2. Technical Specifications
| Parameter Category | Details |
|---|---|
| Model | PM858‑C (Order No.: 3BSE093350R1) |
| Manufacturer | ABB |
| Product Type | Industrial‑grade PLC CPU module, ABB AC 800M series, core processing unit of DCS |
| Core Purpose | 1) Logic operation: executes core logic programming, data processing and command calculation, supports multi‑task parallel processing;2) System control: coordinates I/O modules and intelligent devices to realize equipment interlocking and process control;3) Data communication: high‑speed data transmission with host computer, PLC, sensors and actuators;4) Redundancy: supports hot/cold redundancy to improve system reliability;5) System expansion: compatible with AC 800M series I/O modules, supports system expansion and function upgrade. |
| Electrical Parameters | Supply voltage: 24V DC (operating range 19.2–28.8V DC); Power consumption: ≤25W;Overvoltage, undervoltage, overcurrent and over‑temperature protection;Compliant with IEC 61508 SIL3, CE, RoHS and UL certifications. |
| Processing Performance | Multi‑core processor, frequency ≥1GHz;Instruction execution: Boolean ≤0.1μs, floating‑point ≤0.5μs;Multi‑task parallel processing, task cycle configurable down to 1ms;Built‑in large memory: RAM ≥2GB, Flash ≥8GB for program and data storage. |
| I/O & Communication | Supports Profibus DP, Modbus RTU/TCP, OPC UA, EtherNet/IP and other mainstream industrial protocols;Standard: 2×Gigabit Ethernet (RJ45), 1×RS‑485; communication modules extendable;Seamless connection with AC 800M I/O modules, up to 256 I/O channels;Redundant communication supported for stable transmission. |
| Physical Dimensions | Modular design for standard AC 800M rack mounting;Dimensions: 140×100×40mm (L×W×H); Weight: approx. 0.8kg;Hot‑swap supported, maintenance without system shutdown. |
| Protection Degree | IP20 (rack mounting), basic dust protection;EMC compliant with IEC 1000‑4 series, stable in strong EMI environments. |
| Environmental Rating | Operating temperature: -25°C ~ +70°C; Storage temperature: -40°C ~ +85°C;Relative humidity: 5% ~ 95% (non‑condensing);Vibration: IEC 60068‑2‑6; Shock: IEC 60068‑2‑27. |
| Other Features | Hot/cold redundancy supported to avoid single point of failure;Online programming, debugging and firmware upgrade without system interruption;Built‑in self‑diagnosis monitors status and reports abnormalities;Highly compatible with ABB Control Builder M for programming and configuration;MTBF > 200,000 hours. |
3. Functions & Features
(1) High‑Performance Processing & Multi‑Tasking
High‑speed computing: multi‑core processor ≥1GHz, Boolean ≤0.1μs, floating‑point ≤0.5μs, handling complex logic and large data for real‑time control.
Multi‑task parallel: supports simultaneous execution of logic control, acquisition and communication, with task cycle down to 1ms.
Large memory: RAM ≥2GB, Flash ≥8GB for programs, history data and fault records.
(2) Multi‑Protocol Compatibility & Seamless Integration
Rich interfaces: Gigabit Ethernet, RS‑485, supporting multiple industrial protocols for high‑speed data exchange.
Seamless compatibility: dedicated for AC 800M, fully compatible with I/O and communication modules.
Flexible expansion: up to 256 I/O channels, expandable communication modules.
(3) High Reliability & Redundancy Protection
Redundancy: hot/cold redundant configuration ensures uninterrupted operation.
Comprehensive protection: overvoltage, undervoltage, overcurrent, over‑temperature; high EMC performance.
Long‑term stability: MTBF > 200,000 hours, rugged design for harsh environments.
(4) Easy Maintenance & Intelligent Management
Hot‑swap: replacement without shutdown, reducing downtime.
Convenient engineering: compatible with Control Builder M, online programming and debugging.
Intelligent diagnosis: real‑time monitoring, alarm and fault logging; online firmware upgrade.
4. Applications
Power industry: automation control in power plants and substations, logic control for turbines, boilers and auxiliaries.
Petrochemical industry: process control in refineries and chemical plants, reliable operation under high EMI.
Metallurgy industry: core control for smelting, rolling and casting lines.
General industry: paper, cement, water treatment and other large automation systems.
5. FAQs & Troubleshooting
1. Module fails to start or restarts frequently
Check power supply within 19.2–28.8V DC, correct polarity and tight connections.
Inspect backplane connectors for cleanliness and damage; ensure firm insertion.
Reduce electromagnetic interference: separate communication and power cables, use shielded wiring.
Upgrade firmware; contact ABB authorized service if fault persists.
2. Communication abnormal or data interrupted
Check cables and terminals for open/short circuits.
Verify protocol, IP address, baud rate match system settings; reconfigure via Control Builder M.
Check redundant communication links if enabled.
Test communication interfaces; replace modules if needed.
3. Redundant system switch failure
Ensure stable power supply for both primary and backup modules.
Confirm identical firmware versions and synchronized parameters.
Check redundant link connections.
Review switch logs via diagnostics; contact ABB service for commissioning.
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