MODICON ALU151-1 PLC Central Processing Unit

Technical Specifications

Model: ALU151-1 Brand: AEG MODICON Product Type: A250 Series Rack Mount PLC CPU Module Part Number: 6390-042.244725 Program Memory: 1MB RAM Communication: Modnet1 interface Mounting: Backplane rack slot mount Operating temperature: 0℃ ~ +60℃ Storage temperature: -20℃ ~ +70℃ Relative humidity: 5%~95%, non-condensing Weight: 1.20kg Dimension: 260mm40mm190mm Protection: IP20

System compatibility

ALU151-1 belongs to AEG MODICON A250 series CPU. Compatible with A250 rack backplane and matching series I/O modules. It supports Modnet1 bus network connection for multi-node automation system. Suitable for maintenance and replacement of old control systems in chemical plants, water treatment, power plants and packaging machinery.

Function

ALU151-1 is the main processor for A250 PLC rack system. It executes ladder logic programs, scans digital and analog I/O modules on backplane, performs timer, counter, arithmetic and PID regulation. Modnet1 bus interface supports data exchange between multiple PLC stations and field devices. Lithium backup battery retains user program and runtime data after power loss. Built-in hardware watchdog and power-up self-diagnosis. Front panel LED indicators for RUN, FAULT, BATTERY LOW and bus communication status. Widely used for process and machine control in legacy AEG MODICON automation system.

Installation

Cut off rack power before installation. Insert ALU151-1 CPU module into A250 backplane slot and lock the card. Check gold finger contact condition. Connect power wiring and Modnet1 bus cable. Download PLC program, verify I/O scanning and network communication before formal operation.

Interface

Backplane bus connector, power terminal block, Modnet1 communication port, run/fault/battery low status LED indicators for ALU151-1 AEG MODICON PLC CPU.

Feature

AEG MODICON ALU151-1 rack CPU, 1MB RAM memory, Modnet1 bus communication, battery backup memory, hardware watchdog, self-diagnosis, industrial anti-interference design. This discontinued legacy industrial spare part used for old AEG MODICON A250 PLC rack main control maintenance and replacement.

Diagnostic

CPU no power: check rack power supply, fuse and wiring for ALU151-1. Fault LED on: inspect program checksum error, memory corruption or low backup battery voltage. Modnet1 communication failure: verify bus cable, terminal resistor and shielding grounding. I/O modules not detected: check backplane power and module seating. Intermittent runtime fault: check loose backplane connector and component aging.

Product Brief

ALU151-1 is AEG MODICON A250 series rack mount PLC central processing unit. It runs ladder logic program, scans I/O modules and handles Modnet1 network communication for A250 automation racks, classic spare part for legacy AEG MODICON industrial control system overhaul.

Disclaimer: All parameters are for reference only and shall not be used as the basis for quotation. Goods are scarce, overseas delivery lead time is 3-7 working days. It is only used for equipment maintenance and renovation.