Siemens SIMATIC S7-200 SMART CPU ST40

Series#: Siemens

Product Details

SIEMENS SIMATIC S7-200 SMART CPU ST40 (6ES7 288-1ST40-0AA1) – A high-performance, transistor-output CPU for cost-effective mid-range automation.
24 digital inputs and 16 digital outputs (sinking/sourcing) for flexible control in compact applications.
Integrated Ethernet port for programming, HMI connectivity, and remote access via web server.
High-speed processing and modular expansion support for up to 6 I/O modules.
Programmed via TIA Portal for intuitive, powerful engineering and seamless integration.
Robust industrial design with IP20 protection and wide DC power range (20.4V to 28.8V).
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

Specification

The SIEMENS SIMATIC S7-200 SMART CPU ST40, part number 6ES7 288-1ST40-0AA1, is a versatile and powerful compact controller designed for medium-scale automation tasks requiring precise transistor outputs. This DC-powered CPU combines a 24-point digital input array with 16 high-speed transistor outputs, making it ideal for applications demanding fast switching and reliable control. Its built-in Ethernet interface enables straightforward programming, data exchange, and remote monitoring via the integrated web server, while optional RS-485/Modbus RTU modules expand connectivity to legacy systems. With a robust IP20 enclosure and support for up to six expansion modules, the ST40 delivers scalable performance for industries such as packaging, material handling, and machine building.

Specification	Detail
Product Type	SIMATIC S7-200 SMART CPU
Model Number	6ES7 288-1ST40-0AA1
Power Supply Voltage	20.4V to 28.8V DC
Digital Inputs	24 (sinking/sourcing, 24V DC)
Digital Outputs	16 (transistor, sinking/sourcing, 24V DC)
Output Current per Point	0.5 A (continuous)
Total Output Current per Module	4 A (continuous)
Program Memory	24 KB (for user program and data)
Data Memory	16 KB (retentive)
Bit Memory	256 bytes
Timers/Counters	256 timers, 256 counters
Communication Interfaces	1x Ethernet (RJ45) for programming, HMI, and web server
Optional Communication	RS-485/Modbus RTU, PROFIBUS DP via signal boards
Expansion Capability	Up to 6 I/O modules (local bus)
Memory Card Slot	SIMATIC Micro Memory Card (MMC)
Programming Software	TIA Portal (STEP 7 Basic V13 or higher)
Real-Time Clock	Integrated, battery-backed
Protection Class	IP20
Operating Temperature	0°C to 55°C (horizontal), 0°C to 45°C (vertical)
Dimensions (W x H x D)	125 x 100 x 81 mm
Weight	Approx. 390 g
Application Scenarios	Medium-sized automation, machine control, conveyor systems, packaging lines