Product Overview

• Part No: PM803F, 3BDH000530R1
• Brand: ABB

• Category: AC800F Field Controller CPU Base UnitPM803F is a high‑performance central processing base unit belonging to ABB AC800F Freelance DCS platform. Equipped with powerful RISC processor, large‑capacity RAM and flash storage, it executes real‑time control logic, data processing and fieldbus communication tasks for distributed automation systems. This controller supports full IEC 61131‑3 programming standard, and can work in standalone mode or build redundant dual‑CPU configuration to achieve fault‑tolerant operation for critical processes. Multiple built‑in communication interfaces realize data interaction with I/O modules, engineering workstations, HMI and upper SCADA systems. LED indicators on front panel display running status, fault alarm and communication activity for quick on‑site diagnosis. It is widely adopted in power, chemical and manufacturing industries, serving as key maintenance spare for existing Freelance DCS retrofit and overhaul projects.

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Core Features

• High‑performance RISC processor for real‑time process control computation
• Compliant with IEC 61131‑3 international programming standard
• Supports hot‑standby redundant CPU configuration for high‑availability systems
• Multiple onboard communication ports: Ethernet, RS232, RS485 serial interface
• Expandable I/O capacity via fieldbus connection with S800 I/O stations
• Front‑panel LED indicators for module status, error and communication diagnostics
• Compact DIN‑rail mount housing for cabinet installation
• Hardware watchdog for automatic fault recovery

• Passed strict EMC, vibration and temperature cycling qualification for harsh industrial environment

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Technical Specifications

• Part Number: 3BDH000530R1
• Power Supply: 24 VDC
• Programming Standard: IEC 61131‑3
• Communication: Ethernet, RS‑232, RS‑485
• Operating Temperature: ‑25°C ~ +70°C
• Storage Temperature: ‑40°C ~ +85°C
• Mounting: DIN‑rail mounting

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Fully compatible with ABB AC800F Freelance DCS system and S800 series I/O modules
• Applied in thermal power plants, water treatment, petrochemical, pulp & paper and manufacturing automation
• Used for closed‑loop process regulation, interlock logic and plant‑wide monitoring control