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PRODUCT DESCRIPTION
6ES7288-3AT08-0AA1 acquires eight thermocouple signals
Siemens 6ES7288-3AT08-0AA1 is the SIMATIC S7-200 SMART G2 EM AT08 analog expansion module. Eight inputs measure thermocouples or low-level voltage signals. Each channel can use a different supported thermocouple type, with temperature values reported in tenths of the selected degree unit.
The March 2026 Siemens system manual specifies 0.525 W power consumption and 105 mA SM-bus current for this module. Its integrating measurement method requires the filter, sensor range and cold-junction arrangement to be configured together. Allow for startup calibration and verify valid channel data before enabling the associated control task.
The March 2026 Siemens system manual specifies 0.525 W power consumption and 105 mA SM-bus current for this module. Its integrating measurement method requires the filter, sensor range and cold-junction arrangement to be configured together. Allow for startup calibration and verify valid channel data before enabling the associated control task.
BEFORE YOU BUY
Identify the complete sensor arrangement
ACTUAL APPLICATIONS
6ES7288-3AT08-0AA1 supports distinct temperature and voltage tasks
The official EM AT08 measurement modes and thermocouple ranges support the following engineered tasks. Select the actual sensor and verify its range, reference junction and installation; the module alone does not provide a complete control or safety function.
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01 · HIGH TEMPERATURE
Measure a high-temperature process point
Acquire a supported high-temperature thermocouple signal with its correct software linearization. For example, the official Type C nominal range is 100 to 2315 degrees C. Check the sensor assembly, cold-junction error and required warm-up when specifying the measurement chain. -
02 · SUBZERO MONITORING
Track a below-zero temperature point
Use an appropriate supported sensor for a subzero measurement task. The Type T nominal range extends from -200 to 400 degrees C. Preserve sensor polarity and interpret under-range and underflow indications separately from valid negative temperature readings. -
03 · LOW-LEVEL VOLTAGE
Acquire a millivolt measurement signal
Configure voltage mode when the task requires a low-level electrical measurement instead of thermocouple conversion. The nominal range is -80 to +80 mV with full scale represented by decimal 27648. Match signal limits, filtering and program scaling to this mode.
Technical specifications for 6ES7288-3AT08-0AA1
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Product Model6ES7288-3AT08-0AA1
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Product ParametersEight Channel Thermocouple Module
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In stock1 unit
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ManufacturerSiemens
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Analog input channels8
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Temperature representation0.1 degree C / 0.1 degree F
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Voltage resolution15 bits plus sign
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Nominal voltage range-80 to +80 mV
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Input impedanceAt least 10 MOhm
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Maximum withstand voltage+/-35 V
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Noise rejection85 dB at the selected filter frequency
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Common-mode rejectionGreater than 120 dB
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Field-to-logic isolation707 V DC
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Channel-to-channel isolation120 V AC
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Repeatability+/-0.05% of full scale
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Cold-junction error+/-2.5 degrees C; specified warm-up applies
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Maximum sensor cable100 m; wire resistance 100 Ohm maximum
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Power consumption0.525 W
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SM-bus current105 mA
View all additional
Alternative Names
6ES7288-3AT08-0AA1
Siemens EM AT08
SMART G2 Eight-Channel TC Input
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
G2 THERMOCOUPLE INTEGRATION
Configure the sensor chain, not just the module
Use the G2 EM AT08 in the documented SMART G2 system. The 03/2026 manual lists this exact article; older SMART modules and RTD modules must not be treated as interchangeable from their names alone.
For each channel, record thermocouple or voltage mode, sensor type, selected unit, filter and cold-junction reference. Temperature data is scaled by ten, while voltage data uses a nominal full-scale value of 27648.
Budget 105 mA on the SM bus. Keep the module thermally stable, route low-level signals away from switching power wiring, and account for startup calibration before the program accepts channel data.
Features:
- Eight separate sensor configurations
- Documented range and wire-break diagnostics
- Filter timing coordinated with the process
The Siemens 6ES7288-3AT08-0AA1 requires sensor identity and measurement configuration to be checked before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Verify 6ES7288-3AT08-0AA1 as the SMART G2 EM AT08 thermocouple module. Retain the same model, mounting orientation and station sequence as required by the G2 manual.
Record sensor types, wire polarity, channel assignments, filters and cold-junction settings. Isolate power to the CPU, expansion modules and related equipment before removing wiring or disengaging the bus connection.
After restoration, check valid data after calibration, known sensor temperatures and alarm behavior. Include the specified warm-up when assessing accuracy and confirm unused inputs follow the official shorting instruction.
Features:
- Preserve each channel sensor type
- Verify polarity and reference-junction settings
- Evaluate valid data after calibration
The Siemens 6ES7288-3AT08-0AA1 thermocouple module requires replacement verification of channel settings, terminal connections and measurement error before release.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Extracted from the Siemens S7-200 SMART G2 System Manual, 03/2026, A5E55110929-AB supplied for this product. Original applicable pages remain unchanged. The extract does not replace the complete manual or an engineered installation assessment.
Features:
- Available Siemens document references are confirmed before order
- Check EM AT08 Tables A-38 through A-43 and its terminal map
- Accessories are supplied only when listed in the quotation
Documentation for the Siemens 6ES7288-3AT08-0AA1 requires exact sensor and module identification; confirm manual availability in the written quotation.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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01
Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size7.50 × 1.50 × 11.80 cm
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Shipping weightApprox. 0.08 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8538900000
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OriginChina
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7288-3AT08-0AA1
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Why do all active channels initially read 32767 after power-up?
The module performs internal analog-to-digital calibration after power is applied and reports 32767 until valid channel data is available. Initialization time depends on configuration. Prevent the program from treating this startup value as a real process temperature. -
Does a raw value of 253 mean 253 degrees?
No. In thermocouple mode, temperature is reported in degrees multiplied by ten, so decimal 253 represents 25.3 degrees in the configured unit. Voltage mode uses a different representation with nominal full scale at decimal 27648. -
Can eight installed sensors use different thermocouple materials?
Yes. Siemens permits a different supported thermocouple type on each channel. Keep the sensor identification and software selection aligned; do not configure all channels alike merely because they share one module. -
Why does opening the cabinet door affect an otherwise steady temperature?
Air movement and rapid ambient changes can disturb cold-junction compensation at the module connector. Siemens calls for a thermally stable location and specifies compensation for slow ambient changes below 0.1 degree C per minute. -
Is the published thermocouple accuracy the complete temperature error?
No. The manual requires the internal cold-junction error of +/-2.5 degrees C to be added to the thermocouple-table error. At least 30 minutes of warm-up is required to meet that specification; evaluate the complete measurement uncertainty. -
Should unused thermocouple input pairs remain open?
No. The exact EM AT08 wiring page instructs that unused analog inputs should be shorted. Apply the documented terminal map and isolate electrical power before changing wiring. -
What is the trade-off when selecting the recommended 100 ms integration?
Siemens recommends 100 ms integration for thermocouple measurement. With 10 Hz rejection, the eight-channel module update time is 2.450 seconds. Shorter integrations update faster but increase temperature-reading repeatability error. -
Will disabling the wire-break alarm make a disconnected sensor usable?
No. Siemens warns that an open-wire condition may produce random values when wire-break alarming is disabled. Fault handling must distinguish an invalid sensor signal from an acceptable process reading.
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