6ES7288-1ST60-0AA1 is the AA1 revision of the SIMATIC S7-200 SMART CPU ST60. It integrates 36 digital inputs, 24 transistor outputs and 50 KB of combined program and data memory.

The CPU provides Ethernet/PROFINET and RS485 communication while extending the operating range below 0 °C compared with the earlier AA0 revision.

• Executes bit instructions in 150 ns, word instructions in 1.2 µs and floating-point instructions in 3.6 µs.
• Supports up to eight PROFINET IO devices in controller operation at the documented firmware level.
• Provides six high-speed counter inputs and three 100 kHz pulse outputs for fast machine signals.
• Runs up to eight PID control loops within the compact CPU platform.
• Operates from -20 to +60 °C when mounted horizontally, or -20 to +50 °C vertically.

• Use the complete AA1 hardware identifier when matching the Micro/WIN SMART project and replacement inventory.
• Assign PROFINET names and addresses consistently with the saved configuration before reconnecting distributed devices.
• Preserve the RS485 network parameters and termination arrangement when the serial port is in service.
• Check the high-speed counter and pulse-output mapping because those channels have application-specific wiring.
• Apply the temperature limit for the actual horizontal or vertical mounting orientation.

• Compact machines with a high onboard digital-channel count.
• Control panels exposed to sub-zero ambient temperatures within the AA1 operating range.
• PROFINET-connected skids that also retain an RS485 device network.
• Counting, pulse-output and PID applications maintained in STEP 7 Micro/WIN SMART.