Technical Specifications Back‑plane system bus interface, multiple communication interfaces. Auxiliary working power 24 V DC. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. On‑board program memory and data storage component.
Functional Features Executes user control application program cyclically. Completes logic control, analog closed‑loop regulation and interlock sequence logic. Reads field measuring data and sends control commands to I/O modules via back‑plane bus. Communicates with HMI, engineering station and field devices through external communication ports. Front‑panel LED indicators display module power‑on, program running and fault alarm status. Built‑in hardware self‑diagnosis detects CPU, memory and bus communication abnormality.
Application Scenarios Spare processor module for ABB AC800F DCS rack. Applied in chemical, power plant and process‑control cabinet overhaul projects.
Performance Parameters Stable cyclic program execution performance. Fast process data computing speed. Reliable internal hardware fault detection capability.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Main processing chip, memory and communication processing assemblies. Back‑plane plug‑in connector and external communication terminals.
Structural Characteristics Standard rack plug‑in processor module. Front side equipped with communication interfaces and multi‑bit status LED indicators. Rear side fitted with back‑plane system bus connector.
Working Principle After power‑on and self‑check, PM803F loads user control project. It acquires field process data from I/O modules through rack back‑plane bus, executes control algorithm and interlock logic, outputs control instructions to I/O modules. Meanwhile it exchanges project data and alarm information with upper‑level engineering and monitoring system.
Installation RequirementsConfirm back‑plane connector is fully engaged. Restore power supply, download complete control project and configuration parameters, verify program operation and I/O data interaction.
Usage Notes Download matching project configuration after hardware replacement. Hot‑plug under powered state is prohibited. Confirm no processor‑related fault code after commissioning.
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