Siemens 6ES7291-1AA30-0XA0 | S7-200 CPU Module

The Siemens 6ES7291-1AA30-0XA0 is a compact CPU module for the SIMATIC S7-200 programmable logic controller system. This processor unit executes user programs and manages all I/O operations efficiently. It supports both ladder logic and statement list programming languages for flexible application development . Furthermore, the module handles up to 128 digital I/O points for small to medium-scale automation tasks . The unit delivers reliable performance for basic control applications .

Integrated Memory and Processing Power

This CPU module features 8 KB of user program memory for storing control logic . Its 8 KB of data memory retains process variables and system parameters . The Siemens 6ES7291-1AA30-0XA0 achieves a scan time of approximately 1 ms per 1,000 instructions . This processing speed suits applications requiring moderate response times . Additionally, the module includes a real-time clock for time-based control functions .

Built-in Communication and Expansion Capabilities

The CPU provides a built-in RS-485 communication port for programming and networking . It supports the PPI (Point-to-Point Interface) protocol for simple master-slave configurations . Users can connect the module to a wide range of compatible I/O expansion modules . The Siemens 6ES7291-1AA30-0XA0 supports up to 7 expansion modules for system scalability . This flexibility allows users to tailor the system to specific application requirements .

Technical Specifications

Parameter	Specification
Manufacturer	Siemens
Model	Siemens 6ES7291-1AA30-0XA0
Product Type	CPU Module
Series	SIMATIC S7-200
Order Number	6ES7291-1AA30-0XA0
User Program Memory	8 KB
Data Memory	8 KB
Digital I/O Capacity	Up to 128 points
Expansion Modules	Up to 7
Communication Port	1 x RS-485 (PPI protocol)
Scan Time	Approx. 1 ms per 1,000 instructions
Real-Time Clock	Integrated
Programming Languages	Ladder Logic, Statement List
Power Supply	24 V DC
Power Consumption	3 W
Dimensions (W x H x D)	90 x 80 x 62 mm
Weight	Approximately 0.3 kg
Operating Temperature	0 °C to +55 °C
Storage Temperature	–40 °C to +70 °C
Mounting	DIN rail or panel mount

System Integration and Programming

This CPU integrates seamlessly with the S7-200 system and compatible expansion modules. Users can program the module using STEP 7-Micro/WIN software for convenient configuration . The programming software supports online monitoring and debugging for efficient troubleshooting . Furthermore, the module supports data logging and recipe management for process applications .

Applications and Industries

The CPU serves small-scale automation applications requiring cost-effective control solutions . It commonly appears in conveyor systems, packaging machines, and simple process controls . The module also supports building automation and HVAC control applications . Its compact size makes it ideal for space-constrained installations .