SIMATIC S7-200 SMART CPU ST40 / 6ES7288-1ST40-0AA1

S7-200 SMART CPU ST40 with 24 digital inputs and 16 digital outputs. Program/data memory and expansion support follow the exact model column. Confirm supplied hardware revision and configuration before ordering.

Manufacturer part number: 6ES7288-1ST40-0AA1
Brand: Siemens
Category: PLC and HMI
Catalog status: Request a quotation

Technical specifications

Controller family: SIMATIC S7-200 SMART
CPU designation: CPU ST40
CPU variant: DC/DC/DC
Program memory: 24 Kbytes
User data memory (V): 20 Kbytes
Digital inputs: 24
Digital outputs: 16
Maximum expansion modules: 6
Dimensions (W x H x D): 125 x 100 x 81 mm
Generation scope: S7-200 SMART exact 0AA1 ordering suffix; do not infer compatibility with classic S7-200, CN or other revisions
Document pages: PDF 866, 867, 1003
Current lifecycle status: Not established by historical manual; confirm current lifecycle and supply separately

Manufacturer manual · S7-200 SMART System Manual / V2.8 / 08/2023 · en · PDF · V2.8 / 08/2023 / A5E03822230-ALManufacturer source: Siemens · Model explicitly covered in family document · Covered models: 6ES7288-1ST40-0AA1 · Checked: 2026-10-22Official manufacturer source

This sheet provides a quick technical summary. For design, installation and final selection, review the latest official manufacturer documentation and verify the complete part number.