Product Details

Modicon AS-B885-002 is a dedicated ascii basic module and powerful intelligent communication card designed for Modicon 800 series backplane and Modicon 984 PLC racks. This serial processor card carries onboard BASIC runtime, allowing users to run custom BASIC programs independently of the main CPU to handle serial data parsing, protocol conversion and peripheral device communication. It features two built-in serial ports and supports ASCII and BASIC data processing, making it ideal for connecting printers, barcode readers, serial weighing instruments and third-party serial devices to the Modicon PLC system. By offloading serial communication tasks, this ascii basic module reduces the CPU scan load and maintains stable data exchange even with multiple serial peripherals. As a discontinued legacy spare, this intelligent communication card serves as a drop-in replacement to restore custom serial data handling capability for ageing Modicon automation racks.

Basic Parameters

Brand: Modicon

Model: AS-B885-002

Product Type: ASCII BASIC Intelligent Processor Module

Compatible Rack: Modicon 800 series backplane, Modicon 984 PLC

Onboard Runtime: BASIC interpreter

Communication Ports: Two serial ports

Supported Data Type: ASCII, BASIC

Mounting: Standard rack slot mounting

Product Status: Discontinued legacy spare

Net Weight: Approximately 2.72 kg

Supported Functions

This ascii basic module supports independent BASIC program execution, ASCII string receiving and transmitting, and custom serial protocol parsing. The intelligent communication card performs data formatting, checksum calculation and bidirectional handshake with external serial instruments. This serial processor card can transfer parsed data to the PLC backplane and read register values from the host controller for output to serial devices. It also provides built-in self-diagnosis for port errors and program runtime faults, and supports program backup and download for fast commissioning.

Core Functions

As a standalone serial processor card, this ascii basic module executes user BASIC logic and manages all serial communication traffic between the PLC and external serial peripherals. It isolates serial peripheral traffic from the main CPU to avoid impacting critical control scan cycles. This intelligent communication card acts as a direct spare to rebuild flexible serial interface capability for ageing Modicon automation racks.

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 shielded shell

Protection: Serial port transient surge suppression

Anti-interference: Isolated serial lines to reduce ground loop noise

Compatibility: Matches 800 series backplane and compatible peripheral 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.

available stock.xlsx