ABB PM803F 3BDH000530R1 FieldController Base Unit

‑ Power Supply：24VDC back‑plane power supply；typical power consumption 10W

‑ Mechanical Structure：AC800F rack plug‑in base controller；overall weight approx 1.8kg

‑ On‑board Resources：32‑bit super‑scalar RISC CPU 75MHz；16MB battery‑buffered SDRAM；8MB Flash firmware storage；dual‑level hardware watchdog circuit；3.6V lithium battery for real‑time clock and retention data；ECC memory error correction circuit；comprehensive hardware self‑diagnosis circuit

‑ Communication Interface：internal CAN back‑plane bus for S700 I/O modules；dual 10/100M RJ45 ethernet ports；RS232 service debugging port；multiple expansion slots for additional communication modules

‑ Galvanic Isolation：communication channels adopt galvanic isolation, isolation rating 2500VAC

‑ Core Function：IEC61131‑3 multi‑task control execution, complex PID loop regulation, interlock & sequence/batch control, high‑accuracy SOE event recording, supports CPU hot‑standby redundancy, multi‑protocol communication access, dual‑level hardware watchdog, memory ECC error correction, comprehensive self‑diagnosis

‑ Protection：surge‑suppression and ESD protection for communication ports, reverse‑polarity power‑supply protection

‑ Status LED Indicators：PWR power indicator, RUN running status, ERR fault alarm, COM bus status, ETH network status LED

‑ Weight：approx 1.8kg

‑ Installed inside AC800F controller rack, exchanges data with S700 series I/O modules and communication modules through internal CAN back‑plane bus. Single rack runs one PM803F as primary controller, hardware supports main‑standby hot‑standby redundancy configuration, realizes bumpless switchover upon main CPU fault. Expansion slots can install Profibus‑DP, Modbus, FF fieldbus and other communication interface modules, expansion modules support hot‑swap replacement. Single controller supports maximum around 1000 I/O points, suitable for large‑scale process control stations.

‑ Supports IEC61131‑3 standard programming languages including FBD, LD, ST, SFC. Multi‑task scheduling, minimum configurable cyclic task cycle time 5ms, completes complex continuous PID regulation, cascade control, split‑range control, safety interlock protection, sequential logic and large‑batch process control. Dual ethernet ports can configure system bus redundancy, connect Freelance operator station and upper monitoring system. RS232 service port is used for local program download, debugging and maintenance. ECC memory realizes single‑bit error correction and double‑bit error detection, improves system running stability. On‑board lithium battery keeps real‑time clock and retention process variables when power off. Dual‑level watchdog circuit realizes hardware reset when program runs abnormally.

‑ Module self‑diagnosis continuously monitors back‑plane power supply, CPU operation, memory error, bus and communication channel abnormality; fault codes and alarm messages are uploaded to Freelance operator workstation.

‑ Cannot run independently; must cooperate with AC800F rack, 24VDC rack power supply, S700 I/O modules. Compared with PM802F, PM803F owns larger 16MB application memory, ECC error correction function, stronger processing capacity, for large‑size control projects.

‑ Continuously monitors power supply, memory, CAN back‑plane bus and each communication channel status. Hardware fault will light front‑panel ERR fault LED and report fault alarm code to DCS operator station.

‑ No local historical‑data storage; runtime status and fault diagnosis information are read via Freelance engineering configuration tool.

‑ CPU hardware failure will lead to control station out‑of‑service; under redundant configuration, standby controller will automatically take over control task without process interruption.

‑ Back‑plane connector: insert into AC800F rack main slot, connect internal CAN bus and 24VDC power supply.

‑ External interfaces：dual RJ45 ethernet ports, RS232 service port, expansion slots for communication modules.

‑ Mounting：AC800F rack slot installation

‑ Operating Temperature：0 ℃ ~ +60 ℃

‑ Storage Temperature：‑40 ℃ ~ +85 ℃

‑ Relative Humidity：5‑95 %RH, non‑condensing

‑ Pollution degree：Degree 2

‑ Protection Class：IP20, cabinet‑internal installation.

‑ Cut off rack power before inserting or replacing PM803F main CPU unit, hot‑swap is not supported; only expansion communication modules allow hot‑swap operation. When deploying redundant CPU, follow Freelance redundancy configuration rules, use matched redundant network structure. Use industrial shielded cables for ethernet and field‑bus wiring. Pay attention to lithium‑battery ageing, replace battery periodically to avoid loss of clock and retention data.

‑ For spare‑part replacement: verify full model PM803F and part‑number 3BDH000530R1; after hardware installation download firmware and user control program, verify logic operation, PID loop regulation and all communication channel data interaction. Mismatched hardware will cause station startup failure or abnormal program execution.

‑ Main CPU fault will result in control station stop; redundant configuration can avoid production interruption.

Power plant, chemical industry, large water‑plant Freelance AC800F DCS control cabinets; large‑size process control station main controller; industrial spare‑part for Freelance AC800F DCS high‑end CPU unit.