0-55865-9 RELIANCE

Reliance 0-55865-9 central processing unit

Brand：RELIANCE Model number：0-55865-9

Country of origin: United States Product weight：0.55kg

HS code：9032899099

Product Details：

Product Dimensions：

A Reliance CPU module is the core component of a PLC or DCS system. It contains the microprocessor, memory, and communication interfaces necessary to execute the user-defined control program, manage I/O operations, and communicate with other devices and supervisory systems.

Functionality: The CPU continuously scans inputs from sensors, executes the control program (typically written in ladder logic, but sometimes BASIC or control block languages), and then updates outputs to control actuators. It handles complex logical operations, arithmetic calculations, data manipulation, timing, and counting functions crucial for automating processes. In advanced systems like AutoMax, multiple CPUs could operate within a single rack, often sharing data via a common memory module to increase processing capability.
Architecture: Early Reliance CPUs like the AutoMate 15/20/40 series typically featured Intel 801 or similar microprocessors. Later AutoMax processors (e.g., 57C430A, 57C431, 57C435) utilized more powerful Motorola 68000 series microprocessors (16-bit or 32-bit), allowing for greater memory capacity and faster execution speeds.
Memory: These modules include non-volatile memory (e.g., SRAM with battery backup or EEPROM) for storing the user program, data tables, and configuration parameters. The size of this memory varies significantly by model, impacting the complexity of the applications they can handle.
Communication: CPUs are equipped with communication ports (e.g., RS-232, RS-485, and proprietary networks like Reliance's R-NET or AutoMax's Ethernet Interface modules) to connect to programming devices, Human-Machine Interfaces (HMIs), Supervisory Control and Data Acquisition (SCADA) systems, and other controllers.
Power Supply: Often, the CPU module itself integrates the power supply for the CPU and sometimes for accompanying I/O modules, or it requires a dedicated power supply module within the system rack.

Product Parameters

Specific parameters depend on the CPU model (e.g., AutoMate 15E, AutoMate 20, AutoMate 40, AutoMax 6010/6011/7010).

Processor Type: Examples include Intel 801, Motorola 68000, 68010, 68020.
Program Memory: Ranges from 1K x 16 (AutoMate 15) up to 104K x 16 (AutoMate 40X with expansion cards) or 512K RAM for AutoMax processors.
Execution Speed: Measured in milliseconds per K-ladder element (e.g., 4 ms/K for AutoMate 15, 10 ms/K for AutoMate 20). AutoMax processors could achieve much faster speeds (e.g., 8 MHz or 25 MHz CPU speed for 68010/68020-based models).
I/O Capacity: Dictates the maximum number of digital and/or analog I/O points the CPU can manage directly or via remote I/O subsystems (e.g., 64 digital I/O for AutoMate 15, up to 1024 digital I/O for AutoMate 40X).
Data Registers/Internal Coils: Number of internal variables the CPU can use for programming logic.
Communication Ports: Quantity and type (e.g., 1 or 2 RS-232 ports, R-NET, Ethernet via separate modules).
Power Input: Typically 120/240 VAC or 24 VDC.
Battery Backup: Many CPUs utilized an on-board lithium battery or supercapacitor to retain RAM contents during power failures, often for an extended period (e.g., 42 days).
Operating Temperature: Standard industrial ranges, typically -20°C to +60°C or -25°C to 70°C.

Product Advantages

Reliability and Durability: Reliance CPUs were designed for extreme industrial environments, offering long-term, stable operation crucial for mission-critical applications. Their rugged packaging helped them withstand harsh conditions.
Proven Technology: Being a mature product line, these CPUs have a proven track record in countless applications, giving confidence in their functional stability.
Deterministic Control: PLCs ensure highly deterministic and repeatable control actions, which is vital for process safety and product quality.
Integrated Diagnostics: Built-in LED status indicators and run-time diagnostics aid in quick troubleshooting and system monitoring, reducing downtime.
Modular Design: Allows for flexible system design and expansion by adding I/O or communication modules as needed.
Diverse Programming Capabilities: Supporting ladder logic (a widely understood industrial programming language) and sometimes high-level languages like BASIC or Control Block for more complex tasks.

Important Considerations

Obsolescence: As legacy products, new Reliance CPU modules are generally no longer manufactured. Sourcing replacements or spare parts can be challenging and expensive, often relying on surplus markets.
Technical Support: Direct manufacturer support for these older systems may be limited. Users often rely on third-party service providers or their in-house expertise.
Programming Software and Hardware: Access to compatible programming software (e.g., for IBM compatible PCs) and outdated programming cables/interfaces can be a hurdle.
Integration Challenges: Integrating these older CPUs with modern industrial networks or HMI/SCADA systems might require gateways or protocol converters.
Firmware/Software Updates: Updates or patches are highly unlikely for these legacy systems, leaving them potentially vulnerable to undiscovered bugs or limitations.
Cybersecurity: Older systems were designed before modern cybersecurity threats were prevalent, making them potentially more vulnerable if connected to unsecured networks. Implement robust network segmentation and other security measures.
Battery Maintenance: For CPUs with battery-backed RAM, regular battery replacement is critical to prevent loss of program and data on power failure.

Product Applications

Reliance Electric CPU modules have found extensive use across various industrial sectors due to their robustness and control capabilities:

Manufacturing Automation:

Controlling complex machinery like assembly lines, presses, injection molding machines, and packaging equipment.
Managing robotic cells and automated material handling systems.

Process Control:

Automating batch processes in industries such as food and beverage, pharmaceuticals, and specialty chemicals.
Controlling fluid handling systems, pump stations, and valve sequencing in water and wastewater treatment plants.

Energy and Utilities:

Supervising auxiliary systems in power generation plants.
Controlling and monitoring components within electrical substations (though more modern systems have largely replaced them).

Material Handling:

Controlling conveyor systems, automated storage and retrieval systems (AS/RS), and sortation systems in warehouses and distribution centers.

Pulp and Paper:

Controlling various stages of paper production, from raw material handling to finishing.

57412-E RELIANCE

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