Siemens 6FM1726-3CA00 Positioning Module for SIMATIC S5 WF726C

Siemens 6FM1726-3CA00 is the WF726C positioning module for the SIMATIC S5 PLC, designed to read feedback from serial-absolute and incremental encoders to deliver precise axis positioning in machine tools and other automation tasks. The WF726C variant is documented as Version 1.5 and, like other WF 726 modules, contains two firmware EPROMs for the module’s motion-control routines. The 6FM1726-3CA00 part number (also listed as 6FM1-726-3CA00 or 6FM1726-3CA00-S) is intended for connection to the S5 bus, coordinating encoder data with the controller to enable reliable positioning operations. This positioning module is commonly used in legacy Siemens S5-based setups to interface with serial-absolute and incremental encoders, supporting machine-tool applications and other automation scenarios that require encoder feedback for accurate travel and repeatable positioning.