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PM783F 3BDH000364R000 is a compact central
processing unit in the Freelance series, specifically designed for small and medium-sized process control scenarios. It supports up to 300 I/O points and can be flexibly expanded with 8 direct I/O modules and 1 Profibus interface module. Meanwhile, it is natively compatible with the Modbus TCP protocol and, equipped with dual serial interfaces, achieves the separation of Modbus communication and diagnostic functions, meeting the diverse connectivity requirements in industrial settings.
With its multi-tasking capability and high-performance computing power, this CPU can accurately meet the core demands of process control while minimizing resource usage, making it widely applicable to various industrial automation systems.
Data table download:
PM 783F.pdf

Core Features and Advantages
High-performance Computing and Flexible Expansion
- 96 MHz clock frequency, with 1000 Boolean operations taking only 0.71 ms, ensuring fast instruction execution.
- 10 MB total memory combined with 2 MB application-available RAM provides stable and stable operating space for control programs.
- Supports 8 cyclic priority tasks with adjustable cycles and 1 high-speed PLC-like task, optimizing CPU load distribution.
Comprehensive Communication and Connectivity Capabilities
- Onboard Ethernet interface (IEEE 802.3 standard, 100/10 Mbit/s) with an RJ-45 female connector design, ensuring efficient system communication.
- 2 RS-232C serial interfaces, adapted to general scenarios and service tools respectively, enabling parallel operation of Modbus communication and device diagnostics.
- Supports Modbus TCP protocol and can be expanded with Profibus interface modules, compatible with mainstream industrial communication specifications.
Safety Protection and Status Monitoring
- Equipped with a physical key lock function, which can prohibit application program and firmware downloads, enhancing the operational safety of the device.
- A small front-mounted display screen shows device status and diagnostic information in real-time, facilitating quick on-site troubleshooting.
- Built-in lithium battery (TA 521F) ensures stable storage of critical data in case of power failure.
Industrial-grade Environmental Adaptability
- Operating temperature range of 0°C to 60°C and storage temperature range of -20°C to 75°C, adapting to harsh industrial environments.
- Protection class IP20, compliant with ISA 71.04 G3 anti-corrosion standards, with a relative humidity tolerance of up to 95% (non-condensing).
- Anti-vibration performance up to 1 g (2 Hz-150 Hz) and altitude adaptability below 2000 m, ensuring stable operation in various industrial scenarios.

Technical Specifications

Application Scenarios
- It serves as the core control unit for small and medium-sized process control systems, such as modular equipment control in industries like chemical engineering, pharmaceuticals, and water treatment.
- It is suitable for industrial automation scenarios that require flexible expansion of I/O and communication interfaces, supporting seamless connection with various sensors, actuators, and upper-level systems.
- It applies to compact control cabinet installation scenarios with strict requirements on equipment size and power consumption, and is adaptable to harsh industrial operating environments.
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