Product Details

Modicon AS-B885-100 is a high-performance single axis motion module and dedicated servo control card designed for Modicon 800 and 984 series PLC racks. This intelligent motion card adopts DNP direct numerical processing technology and supports one servo axis with resolver feedback, delivering high-precision closed-loop motion control without heavy reliance on the main CPU. It executes point-to-point positioning, speed profiling and homing routines, and sends drive commands to matched servo amplifiers while receiving resolver position feedback for real-time correction. Equipped with 17 LED indicators for status and diagnostic readout, this single axis motion module allows technicians to quickly identify faults during commissioning and maintenance. As a discontinued legacy spare, this servo control card serves as a drop-in replacement to restore accurate axis movement for ageing automated machinery.

Basic Parameters

Brand: Modicon

Model: AS-B885-100

Product Type: Single Axis Intelligent Motion Control Module

Compatible Rack: Modicon 800 series backplane, Modicon 984 PLC

Axis Control: 1 independent servo axis

Position Feedback: Resolver interface

Technology: DNP direct numerical processing

Indicators: 17 on-board LED diagnostic lights

Form Factor: Single width slot module

Mounting: Standard rack slot mounting

Product Status: Discontinued legacy spare

Net Weight: Approximately 1.05 kg

Supported Functions

This single axis motion module supports programmable motion profiles, homing sequence, electronic gearing and position preset operation. The servo control card performs continuous position tracking, error monitoring and over-travel protection. This intelligent motion card transfers motion status, fault codes and position values to the host PLC backplane, and accepts motion commands downloaded from the CPU. It supports parameter storage for rapid configuration after module replacement and built-in self-test for hardware verification.

Core Functions

As a dedicated servo control card, this single axis motion module independently manages closed-loop positioning for one servo axis and converts digital motion commands into analog or pulse drive signals. It continuously compares resolver feedback against target positions to minimise positioning deviation. This intelligent motion card acts as a direct spare to recover reliable single-axis motion control 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: Robust industrial metal module shell

Protection: Software over-speed and position limit protection

Anti-interference: Shielded resolver port for noisy factory wiring

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.

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