Description
‑ Power Supply：24VDC back‑plane power supply；typical power consumption 7W
‑ Mechanical Structure：AC800F rack plug‑in base controller；overall weight approx 1.2kg
‑ On‑board Resources：32‑bit RISC CPU 166MHz；4MB battery‑buffered RAM；16MB Flash firmware storage；hardware watchdog circuit；battery backup for real‑time clock and retention data；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；expansion slots for additional communication modules
‑ Galvanic Isolation：communication channels adopt galvanic isolation, isolation rating 2500VAC
‑ Core Function：IEC61131‑3 multi‑task control execution, PID loop regulation, interlock & sequence control, SOE event recording, supports CPU hot‑standby redundancy, multi‑protocol communication access, hardware watchdog, 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 1.2kg
‑ 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 PM802F as primary controller, hardware supports main‑standby hot‑standby redundancy configuration, realize bumpless switchover upon main CPU fault. Expansion slots can install Profibus‑DP, Modbus and other communication interface modules, expansion modules support hot‑swap replacement.
‑ Supports IEC61131‑3 standard programming languages including FBD, LD, ST, SFC. Multi‑task scheduling, configurable cyclic task cycle time, completes continuous PID regulation, cascade control, safety interlock protection, sequential logic and 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. On‑board lithium battery keeps real‑time clock and retention process variables when power off. Independent watchdog circuit realizes hardware reset when program runs abnormally.
‑ Module self‑diagnosis continuously monitors back‑plane power supply, CPU operation, memory fault, 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 PM803F, PM802F is low‑end model with 4MB application memory, for medium‑small scale control station.
‑ 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：‑20 ℃ ~ +60 ℃
‑ Storage Temperature：‑40 ℃ ~ +85 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Pollution degree：Degree 2
‑ Protection Class：IP20, cabinet‑internal installation.
- PM802F controller base unit（3BDH000002R1）
Complementary parts: AC800F controller rack, 24VDC rack power supply, S700 series I/O modules, communication expansion modules(optional), industrial shielded ethernet cables, Freelance engineering & monitoring software.
‑ Cut off rack power before inserting or replacing PM802F 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 PM802F and part‑number 3BDH000002R1; 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, water‑plant, chemical industry Freelance AC800F DCS control cabinets; medium‑small‑size process control station main controller; industrial spare‑part for Freelance AC800F DCS CPU unit.
- ABB Freelance AC800F dedicated PM802F base controller (3BDH000002R1), 4MB battery‑buffered application memory, fan‑less cooling structure.
- 32‑bit 166MHz RISC CPU, dual ethernet ports support system bus redundancy, RS232 local service port, multiple expansion slots for field‑bus modules.
- Supports controller‑level hot‑standby redundancy, realizes bumpless switchover for high‑reliability process occasions.
- Main CPU unit does not support hot‑swap, expansion communication modules support hot‑swap replacement.
- Fully complies with IEC61131‑3 standard, completes PID, interlock, sequence and batch control, built‑in SOE event recording and hardware watchdog function.
- Legacy discontinued DCS spare‑part, only applied for old‑system maintenance and retrofit projects。
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