MELSEC iQ-R and Q Series UL Mark Re-indication Technical Bulletin

This technical bulletin announces the re-indication of the UL mark on specific MELSEC iQ-R and Q series programmable controllers following material changes to address noncompliance of Toyobo's PBT resin (PLANAC) with UL requirements. The change applies to products manufactured from May 2021 (iQ-R series) and December 2021 (QY13L), with both marked and unmarked products potentially circulating during the transition period.