Siemens 6SC9111-2AE2 2-Channel Safety Relay Module

Siemens 6SC9111-2AE2 PC Sequence Board is a legacy Siemens module designed for use within SIMODRIVE drive systems. Identified by the part number 6SC9111-2AE2, this board appears in listings as a replacement PC sequence board for SIMODRIVE configurations. ClassicAutomation explicitly lists it as a “PC Sequence Board” for Siemens equipment, confirming its role within the SIMODRIVE family. Third‑party suppliers such as Lektronix and Save-tech market the 6SC9111-2AE2 as repair or exchange parts, underscoring its function as a serviceable component in older automation setups. In the context of Siemens automation history, components in the 6SC9xxx family were used to assemble and repair legacy SIMODRIVE drives, and the 6SC9111-2AE2 is documented among those parts in spare‑parts catalogs and dealer inventories. This module is typically encountered by technicians maintaining or restoring vintage Siemens drive systems, where it serves as an intermediate assembly within the drive electronics chain and is compatible with other SIMODRIVE subsystems of its era.