The Siemens SIMATIC S7-200 CPU 226 PLC (6ES7216-2AD23-0XB0) is a compact programmable logic controller designed for industrial automation, machine control, and process sequencing. This CPU 226 model features a 24 V DC power supply, 24 digital DC inputs, and 16 transistor-type digital DC outputs, making it suitable for automation systems that require a larger number of integrated digital I/O points.

The controller processes signals from sensors, push buttons, limit switches, and other compatible field devices according to the user program. Its transistor outputs are designed for compatible DC loads and support fast switching applications within the specified electrical limits. Selected outputs can also support high-speed pulse-generation tasks, subject to the CPU configuration and manufacturer specifications.

The CPU 226 provides up to 24 KB of integrated program memory, with 16 KB available when runtime editing is active, and 10 KB of data memory. Two integrated serial interfaces support PPI and freeport communication and compatible MPI-related configurations. The controller can be expanded using compatible S7-200 modules, subject to the system's electrical and configuration limits.

This PLC is suitable for maintaining and repairing existing Siemens S7-200 automation systems. Siemens lists this model as a spare part and indicates that its product has been cancelled since October 1, 2017. Availability may therefore depend on remaining inventory, used equipment, or refurbished stock.

Key Features

• Siemens SIMATIC S7-200 CPU 226 compact PLC

• Exact order number: 6ES7216-2AD23-0XB0

• 24 V DC power supply

• 24 integrated digital DC inputs

• 16 integrated transistor-type digital DC outputs

• Up to 24 KB program memory

• 10 KB data memory

• Two PPI/freeport communication interfaces

• Integrated RS-485 serial communication

• Supports compatible PPI, freeport, and MPI-related communication configurations

• High-speed counter functionality

• High-speed pulse outputs on supported channels

• Compatible S7-200 expansion module support

• PROFIBUS DP expansion capability with suitable hardware

• Compact design for industrial control cabinets

• Suitable for compatible legacy machinery and automation systems

Technical Specifications

Specifications are based on published Siemens product data. Output-current limits, grouped output loads, pulse-output performance, and expansion capacity depend on operating conditions. Consult the official datasheet before designing or modifying a control system.

Applications

The Siemens S7-200 CPU 226 PLC can be used in compatible automation systems for:

• Industrial machine and equipment control

• Conveyor and material-handling systems

• Packaging and production machinery

• Pump and water-control systems

• Manufacturing and assembly automation

• Sensor monitoring and digital signal processing

• High-speed counting and pulse-control applications

• Industrial process sequencing

• Control-panel maintenance and repair

• Legacy PLC replacement and refurbishment

• Compatible industrial communication configurations

Compatibility and Installation

Before ordering, confirm that the existing system requires the exact part number 6ES7216-2AD23-0XB0. This model uses a 24 V DC power supply and transistor-type DC outputs. It is different from the CPU 226 version 6ES7216-2BD23-0XB0, which uses an AC power supply and relay outputs.

Verify the power supply, output polarity, connected-load current, expansion modules, communication interfaces, and programming software. Transistor outputs do not provide built-in short-circuit protection, so suitable external circuit protection must be provided.

Installation, wiring, and commissioning should be performed by qualified personnel in accordance with Siemens documentation and applicable electrical safety requirements.

Product Availability Note

The Siemens SIMATIC S7-200 CPU 226 is a discontinued legacy product. Depending on the supplier, available units may be new old stock, used, or refurbished. Confirm the exact order number, product condition, warranty, and return policy before purchasing.