Product Details

Modicon AS-884A-100 is a reliable plc processor designed as the core cpu controller for the classic Modicon 884A automation rack system. This legacy spare part is widely used as a replacement unit for ageing industrial control equipment. It runs ladder logic programs, scans field input and output signals, and exchanges data through Modbus communication to connect with HMI and host monitoring systems. Equipped with non-volatile memory, it keeps user programs and register data safe during unexpected power loss, which guarantees continuous operation for industrial sites and reduces downtime caused by hardware failure.

Basic Parameters

Brand: Modicon

Model: AS-884A-100

Product Type: PLC Processor Module

User Logic Memory: 2K

Supported Protocol: Modbus

Programming Language: Ladder Logic

Max Discrete I/O: 256 Points

Mounting Method: Rack Mount

Product Condition: Discontinued legacy spare

Net Weight: Approximately 2.3 kg

Supported Functions

This plc processor supports ladder logic program upload, download and modification, real-time I/O scanning, data register storage and remote data transmission. It provides built-in diagnostic functions to detect communication faults and module abnormalities. It also supports sequential control, interlock logic and mathematical calculation to meet different automation control demands.

Core Functions

As the central cpu controller, this module executes all user control logic and processes field signals to trigger corresponding output actions. It maintains stable scan cycles for the whole control rack and handles Modbus communication for upper-level supervision. This legacy spare part acts as a drop-in replacement to quickly restore the operation of old Modicon control systems.

Hardware Specifications & Environmental Features

Operating Temperature: -10°C ~ +60°C

Storage Temperature: -20°C ~ +70°C

Relative Humidity: 5%–95%, non-condensing

Housing: Heavy-duty industrial metal casing

Anti-interference: Built-in surge and noise suppression

Compatible Series: Modicon 800 series backplane and matching I/O modules

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm 800 series backplane compatibility, pulse signal type, counting mode and preset logic before ordering.

This is from our current stock.

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