Siemens 6SC9111-2AC25 Firing Board Module For Industrial Automation Systems

Siemens 6SC9111-2AC25 is an Inverter Trigger Set (WRS) module that functions as a firing board for the drive's inverter stage in Siemens industrial automation systems. Assigned part number 6SC9111-2AC25, it is commonly described as a firing board or inverter trigger module in Siemens drive documentation and distributor listings. Multiple sources identify it specifically as the 6SC9111-2AC25 Inverter Trigger Set (WRS) and market it as a spare/refurbishment item for Siemens drives. In operation, the module provides the firing control signals that coordinate the inverter's switching actions, enabling proper motor control in automation equipment. This OEM module is typically sourced as a replacement for Siemens drive assemblies and is found in maintenance and repair contexts.