Siemens 6ES7288-1ST30-0AA1 is a SIMATIC S7-200 SMART CPU ST30 for compact automation equipment using a 24 V DC control supply. The DC/DC/DC controller integrates eighteen 24 V DC digital inputs and twelve sourcing MOSFET transistor outputs, including three pulse outputs rated by Siemens for operation up to 100 kHz.
The CPU provides 18 KB of program memory, 16 KB of user data memory, PROFINET and integrated RS485 communication. It supports up to six expansion modules and one signal board; supply quality, output grouping, current limits, suppression, grounding, firmware and commissioning must follow the current Siemens S7-200 SMART System Manual.
Siemens 6ES7288-1ST30-0AA1 is engineered with STEP 7 Micro/WIN SMART and belongs to the S7-200 SMART family. It supports up to six S7-200 SMART expansion modules and one compatible signal board, selected according to firmware and power limits.
PROFINET and RS485 functions must be configured according to current Siemens documentation. Confirm MOSFET output ratings, common grouping, network settings, grounding and installation conditions before commissioning.
Siemens identifies 6ES7288-1ST30-0AA1 as the CPU ST30 DC/DC/DC article for the SIMATIC S7-200 SMART family. An exact replacement must retain the complete article number and use a supported firmware and STEP 7 Micro/WIN SMART engineering-tool combination.
Before replacement, archive the project and verify I/O allocation, MOSFET output grouping, expansion power, signal-board selection, PROFINET and RS485 settings. Check the current Siemens product record for PLM status and any official successor notice before procurement or commissioning.

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