Technical Specifications Processor Type: High‑performance industrial 32‑bit processing core User Program Memory: 1024 KB Flash memory Data Memory: 512 KB RAM Fieldbus Interface: CS31 fieldbus, maximum 31 remote stations Serial Communication Port: RS232 / RS485 compatible interface Expansion Capability: Support local I/O rack and distributed remote I/O expansion Operating Power Supply: 24 VDC Operating Current: 450 mA typical value Operating Temperature: 0 ℃ to +55 ℃ Storage Temperature: -40 ℃ to +85 ℃ Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard AC31 single‑slot CPU form factor Mounting Standard: DIN‑rail EN 60715 Certifications: CE, UL
Functional Features Supports cyclic execution of large‑scale user PLC control programs. Provides complete PID closed‑loop regulation, timer, counter and complex arithmetic function blocks. Realizes data communication with distributed remote I/O modules via CS31 fieldbus. Offers program storage and parameter persistent saving inside onboard Flash memory. Implements comprehensive hardware and program self‑diagnosis. Provides multi‑color LED indicators for run status, fault alarm and bus communication status. Supports online program download, upload and monitoring through programming software. Realizes interlock logic processing for safety‑related equipment control loops. Maintains full mechanical and software compatibility with 07KT98B for direct field replacement.
Application Scenarios Factory assembly line automatic control systems. Water treatment plant process monitoring and interlock control. Packaging machinery and material handling equipment control. Building automation and HVAC control loops. Small‑medium chemical plant auxiliary process control. Distributed remote I/O networking automation projects.
Performance Parameters Program scan cycle: Minimum 0.1 ms per 1K instruction Maximum CS31 bus transmission distance: 1000 meters at low baud rate Maximum supported remote I/O station quantity: 31 stations Fault tolerance: Internal watchdog circuit prevents program deadlock Mean Time Between Failures: Greater than 280000 hours under normal industrial environment Shock and vibration resistance: Complies with IEC 60068‑2‑6 cabinet‑mount industrial standard
Material Composition Main circuit substrate: High‑grade industrial multilayer printed circuit board with anti‑corrosion conformal coating. Housing and frame: Reinforced flame‑retardant industrial plastic housing. Connector parts: Gold‑plated backplane bus connectors and screw‑type field terminal blocks. Internal components: Industrial grade microprocessor, flash storage chip, isolated communication transceiver chips. Structural fasteners: Anti‑loosening metal spring clips for DIN‑rail locking.
Structural Characteristics Standard single‑slot plug‑in structure matching AC31 series rack. Front panel equipped with multi‑status LED indicator lamps for run, fault and bus status. Backplane golden finger interface for internal system bus connection. Screw terminal block located at module front side for serial communication wiring. Integrated shielding structure to suppress external electromagnetic interference. Spring‑clip locking mechanism for firm DIN‑rail installation to resist vibration displacement.
Working Principle Power supply is fed into the CPU unit from 24VDC power terminal. On‑board microprocessor loads user program stored in Flash memory into RAM for cyclic execution. Input signal data is collected from local I/O modules and remote CS31 bus stations. After completing logic judgment, arithmetic calculation and PID processing, output instructions are transmitted to corresponding I/O modules via backplane and CS31 bus. Built‑in watchdog circuit continuously monitors program running status. When hardware fault or program execution abnormality is detected, fault flag will be triggered and corresponding front‑panel LED will light up without damaging stored user program. Serial communication port realizes data exchange with upper‑level configuration software or third‑party devices.
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