The Siemens SIMATIC S7-200 SMART CPU CR40 AC/DC/Relay PLC (Part Number: 6ES7288-1CR40-0AA0) is a compact programmable logic controller designed for industrial automation, machine control, and manufacturing applications. This controller combines an AC power supply, 24 V DC digital inputs, and relay outputs in one unit, providing a flexible control solution for compatible industrial systems.

The CPU features 24 digital inputs rated at 24 V DC and 16 relay outputs rated up to 2 A under specified operating conditions. It supports an AC power supply range of 85–264 V AC at 47–63 Hz, making it suitable for compatible industrial electrical installations. The controller provides 20 KB of combined program and data memory and supports programming through Siemens STEP 7 Micro/WIN SMART software.

The integrated digital inputs can monitor compatible sensors, push buttons, selector switches, limit switches, and other industrial field devices. The relay outputs can switch compatible electrical loads within the manufacturer's specified voltage, current, and load-type ratings. This onboard I/O configuration can help simplify control-panel design and reduce the need for separate digital I/O modules in suitable applications.

The Siemens S7-200 SMART CR40 supports an RS-485 communication interface for connection to compatible industrial devices and automation systems. Ethernet availability should be verified against the specific hardware version and official documentation before system integration. The controller also supports functions such as high-speed counting, real-time clock operation, and PID control, subject to configuration and application requirements.

This PLC is suitable for packaging machinery, conveyor systems, manufacturing equipment, assembly lines, material-handling systems, and industrial control panels. Its compact design, integrated I/O, and relay-based outputs make it a practical option for automation applications that require programmable logic and multiple digital control signals.

Technical Specifications:

• Brand: Siemens

• Product Family: SIMATIC S7-200 SMART

• Product Type: Programmable Logic Controller (PLC)

• CPU Model: CR40

• CPU Configuration: AC/DC/Relay

• Order Number: 6ES7288-1CR40-0AA0

• Power Supply Type: AC

• Supply Voltage Range: 85–264 V AC

• Rated Supply Options: 120 V AC / 230 V AC

• Supply Frequency: 47–63 Hz

• Rated Current Consumption: 150 mA at 240 V AC

• Maximum Current Consumption: 250 mA at 120 V AC

• Digital Inputs: 24

• Digital Input Voltage: 24 V DC

• Digital Outputs: 16 relay outputs

• Maximum Relay Switching Current: 2 A under specified load conditions

• Program Memory: 12 KB

• User Data Memory: 8 KB

• Combined Program/Data Memory: 20 KB

• Programming Software: STEP 7 Micro/WIN SMART

• Communication Interface: RS-485

• High-Speed Counter Functions: Supported

• PID Control: Supported

• Real-Time Clock: Supported

• Sensor Power Output: 24 V DC, up to 300 mA

• Mounting Type: Standard DIN rail

• Protection Rating: IP20

• Dimensions (W × H × D): Approximately 125 × 100 × 81 mm

• Approximate Weight: 440 g

• Main Application: Industrial automation and machine control

Key Features and Benefits:

1. Integrated Digital I/O: Provides 24 digital inputs and 16 relay outputs for compatible industrial automation systems.

2. Wide AC Power Input: Supports 85–264 V AC at 47–63 Hz within the specified operating range.

3. Relay Output Switching: Enables switching of compatible electrical loads within the manufacturer's relay contact ratings.

4. 20 KB Program/Data Memory: Provides memory capacity for suitable PLC programs and application data.

5. RS-485 Communication: Supports serial communication with compatible industrial equipment and control systems.

6. Flexible PLC Programming: Compatible with STEP 7 Micro/WIN SMART software for program development, troubleshooting, and maintenance.

7. High-Speed Counting: Supports configured counting functions for suitable machine-control applications.

8. PID Control Capability: Can support compatible process-control applications when properly configured.

9. DIN Rail Mounting: Designed for installation inside a compatible industrial control cabinet.

10. Compact Industrial Control: Combines CPU functionality and onboard I/O in a single unit for suitable automation projects.

Applications:

• Industrial machine automation

• Manufacturing and assembly lines

• Packaging and filling machinery

• Conveyor belt control systems

• Automated production equipment

• Material-handling systems

• Industrial control panels

• Digital sensor and switch monitoring

• Pump and utility control systems

• Machine sequencing and interlocking

• Industrial equipment monitoring

• OEM machinery and automation systems

• Factory automation and process control

• Relay-based industrial control systems

• Production-line automation

Installation and Compatibility: Before purchasing or installing the Siemens 6ES7288-1CR40-0AA0 PLC, verify the order number, AC supply requirements, digital input wiring, relay contact ratings, connected load specifications, communication requirements, and PLC program compatibility. This model requires an AC supply within its specified range and must not be powered directly from 24 V DC. Relay outputs must be operated within the manufacturer's electrical ratings, especially when switching inductive or high-inrush loads. Installation, wiring, commissioning, and maintenance should be performed by qualified personnel following Siemens documentation and applicable electrical safety standards.