Siemens 6ES7288-3AR02-0AA0 EM AR02 2-Channel RTD Input Module
A two-channel EM AR02 signal module for resistance-temperature and resistance measurement in S7-200 SMART systems.
Overview
Siemens 6ES7288-3AR02-0AA0 is the SIMATIC S7-200 SMART EM AR02 expansion module with two 16-bit RTD input channels. It accepts supported resistance-temperature sensors and resistance measurements through documented two-, three- or four-wire connections.
The two-channel identity is essential because the closely related AR04 has four channels. Wiring, project configuration and spare selection must preserve the exact AR02 article number.
The module performs internal calibration after power-up and reports diagnostic conditions such as overflow, underflow, wire break and low 24 V supply through the configured system.
Specifications
Features
Flexible RTD wiring
Two-, three- and four-wire sensor circuits can be represented with the approved terminal arrangement.
Resistance measurement path
The same module family supports documented RTD temperature and resistance ranges.
Diagnostic visibility
Wire break, range errors and low supply conditions can be exposed to the control project.
Internal calibration
The module calibrates after power-up and holds the defined diagnostic value until valid conversion begins.
Applications
Machine temperature points
Two documented bearing, winding or process-temperature inputs in a compact S7-200 SMART station.
Resistance monitoring
Approved resistance measurements where lead arrangement and range are retained in the project.
Service replacement
Like-for-like AR02 exchange with the sensor type, wiring mode and project channel scaling preserved.
Lifecycle
Capture
Archive the project, sensor type, range, engineering units and lead configuration for both channels.
Wire
Verify 24 V supply, shield routing and the two-, three- or four-wire terminal map before energizing.
Prove
Allow calibration to finish, then compare both readings with traceable reference values and verify diagnostics.
About IndustryParts
https://www.industryparts.com/Exact-model handling for 6ES7288-3AR02-0AA0
IndustryParts prepares this em ar02 2-channel rtd input module enquiry with the complete label, requested quantity and installed-system evidence kept together, so the proposed supply can be compared with the actual application before dispatch.
FAQ
Is 6ES7288-3AR02-0AA0 the same as the four-channel AR04?
No. 6ES7288-3AR02-0AA0 is EM AR02 with two RTD inputs; channel count and project mapping must not be borrowed from AR04.
What evidence should accompany a 6ES7288-3AR02-0AA0 spare request?
Provide the full label, sensor types, measurement ranges, two-/three-/four-wire diagrams, channel scaling and terminal photographs.
Why can 6ES7288-3AR02-0AA0 show a diagnostic value after power-up?
The module performs internal calibration before normal conversion and maintains the defined status until valid measurements are available.
How should cable resistance be handled on 6ES7288-3AR02-0AA0?
Use the approved wiring method and retain the lead configuration in the project; three- and four-wire circuits compensate differently from two-wire circuits.
What belongs in the 6ES7288-3AR02-0AA0 acceptance record?
Record 24 V supply, calibration completion, both reference checks, engineering-unit scaling, wire-break behavior and final project identity.
