Schneider ALU 200 CPU | 20MHz 128KB Program Memory

The ALU 200 serves as the central processing unit for Schneider PLC systems. This module executes user programs and manages all I/O data transfers. Its rectangular frame measures 125 millimeters in width. The module height reaches 110 millimeters exactly. Depth stays at 85 millimeters. You will find this unit weighs approximately 0.52 kilograms. Therefore, installation requires a standard DIN rail clip. One front-panel RS-232 port connects to programming software.

Physical Layout and Connectors

The front panel features a 2-line LCD display for system diagnostics. You will find six push buttons for local configuration access. One RS-485 port supports Modbus communication networks. A removable terminal block provides 24V DC power input connections. Four status LEDs indicate run, stop, error, and battery conditions.

Technical Specifications

Parameter	Specification
Module Width	125 mm
Module Height	110 mm
Module Depth	85 mm
Unit Weight	0.52 kg
Processor	16-bit @ 20 MHz
Program Memory	128 KB (ladder logic)
Data Memory	64 KB (retentive)
Scan Time	0.8 ms per 1K instructions
Communication Ports	RS-232, RS-485
Component Total	487 discrete parts
Internal Energy Storage	1500 µF capacitor bank
Backup Battery	Lithium (3V, 5 years)
Operating Temperature	0°C to +55°C

Internal Design and Energy Storage

The ALU 200 contains exactly 487 discrete components inside. A 1500 microfarad capacitor bank filters the main power supply input. This bank holds enough charge for 15 milliseconds after power loss. The processor chip runs at 20 megahertz for fast execution. A lithium battery retains data memory for up to five years. EEPROM stores the user program without any battery backup.

Operational Performance

This CPU executes ladder logic from 128 kilobytes of program memory. It scans 1,000 instructions in just 0.8 milliseconds. Moreover, the unit handles up to 256 digital I/O points directly. Two communication ports allow connection to HMIs and drives. The LCD display shows real-time system status and fault messages. Six buttons let you navigate menus without a computer. Consequently, you achieve reliable control for medium-sized automation systems. Schneider designed this CPU for compact machine control applications. Its industrial enclosure meets IP20 protection standards.

In summary, the ALU 200 delivers powerful yet compact CPU performance. Use this processor for packaging, conveying, or assembly machines. It reduces system cost with integrated communication ports. Order this CPU for your Schneider PLC upgrade project.