
Siemens SIMATIC S7-200 SMART analog expansion module with 4 thermocouple inputs, designed for temperature acquisition within compact automation systems.
The Siemens 6ES7288-3AT04-0AA0 is the SIMATIC S7-200 SMART EM AT04 analog input module. It provides four analog inputs for thermocouple measurement and supports a maximum resolution of 16 bit. The module operates from a 24 V DC supply and is intended for integration with the S7-200 SMART automation platform.
Suitable for PLC-based temperature acquisition where thermocouple signals need to be brought into the S7-200 SMART control architecture.
Four independent thermocouple channels make the module useful where several temperature points must be monitored by one compact PLC system.
It may become a replacement requirement when temperature channels become unavailable, readings become abnormal, or an existing S7-200 SMART expansion module requires service.
Loss of temperature acquisition can affect process supervision and control decisions. When a failed analog expansion module interrupts several temperature channels at once, maintenance teams may need the exact replacement quickly to reduce troubleshooting time and limit production interruption.
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