What this RTD signal board does in an S7-1200 rack
The 6ES7231-5PB50-0XB0 is a SB 1231 RTD signal board — two analog RTD inputs for Pt100 and Pt1000 sensors, designed to snap onto the front of a SIMATIC S7-1200 G2 CPU without consuming a slot in the main signal module rack.
Compliance and documentation for cross-border sourcing
RoHS compliant since 01-05-25, with REACH Article 33 candidate list disclosure available from Siemens — same part, different passport, but the compliance paperwork travels with it. Export control classification is AL: N / ECCN: EAR99H, meaning no special license is required for most destinations — a clean customs lane for cross-border sourcing.