Technical Specifications 32‑bit RISC processor runs at 67 MHz clock frequency. RAM capacity is 12 MB, flash memory is 4 MB for firmware and application storage. Rated input power is 24 V DC, working voltage range 19.2‑30 V DC. Typical power consumption is 5.1 Watt. Operating temperature range 0 ℃‑60 ℃, non‑condensing relative humidity 5%‑95%. Equipped with dual 10/100 Mbps Ethernet ports, ModuleBus, CEX‑Bus, redundancy control link interface and dual redundant power input terminals. Supports maximum twelve CEX‑Bus peripheral modules. Protection grade IP20 for cabinet‑only installation. It complies with industrial EMC immunity standard for heavy electromagnetic interference environment.
Functional Features Executes full set of IEC61131‑3 programming languages for process control. Supports hardware‑based hot‑standby redundancy when paired with second PM862 unit. Built‑in comprehensive self‑diagnosis covers CPU operation, memory integrity, power supply status and every communication channel. Lithium backup battery preserves RAM variable data upon main power loss. Real‑time clock provides high‑precision time stamp for event log and alarm records. Supports online partial download of control program without stopping running process. Front‑panel LED indicators reflect power supply, run status, internal fault, battery health and redundancy operating mode. Compatible with multiple upper‑layer communication protocols by installing corresponding CEX‑Bus communication modules. Internal short power reservoir circuit completes orderly data saving during short‑term power drop.
Application Scenarios Main controller unit for chemical plant, pulp mill, municipal water treatment and medium‑size manufacturing automation system. Suitable for both single non‑redundant control cabinet and high‑availability redundant controller cabinet. Cooperates with S800 I/O series for distributed field signal acquisition and actuator driving. Connects to System 800xA operator station for human‑machine interaction, historical data recording and alarm management. Applies to process sites requiring moderate computing load and stable cyclic control performance.
Usage Notes Wear anti‑static wrist strap before touching exposed circuit board parts.
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