Siemens 6AU1240-1AB00-0AA0: High-Performance Programmable Motion Controller with DRIVE-CLiQ, 4 Encoder Inputs, Multi-Axis Coordination

Technical Specifications

Main Features and Advantages

C-series independent box architecture vs. D-series mezzanine.​ The Siemens 6AU1240-1AB00-0AA0​ is built as a self-contained industrial box, not a daughter-card that clips onto a SINAMICS PM340. This gives engineers freedom in cabinet layout — DIN-rail or panel mount — and makes it far easier to deploy in retrofit scenarios where an S120 booksize lineup already exists but a separate motion controller brain is preferred for decentralization or spare-parts commonality.Dual-fieldbus bridging for modernization projects.​ The “PN” suffix is the differentiator: the Siemens 6AU1240-1AB00-0AA0​ carries native PROFINET IO controller capability (2× RJ45 with MRP ring, IRT isochronous) plus PROFIBUS DP via an IsoPROFIBUS expansion. In plants migrating from PROFIBUS to PROFINET, one controller talks both worlds — PROFINET upstream to an S7-1500 cell PLC and HMI, PROFIBUS downstream to a legacy S120 drive line or third-party DP-only drives. That bridge capability alone extends the hardware’s viable lifecycle by years.Onboard I/O density that eliminates expansion racks.​ 18 DI + 8 DO + 4 encoder inputs live directly on the Siemens 6AU1240-1AB00-0AA0​ housing. For machine-level signals — guard-door release, E-stop chain, home/limit switches, cam-trigger photoeyes, reject flaps — keeping them on the motion controller rather than a remote ET 200 rack tightens the sensor → motion-decision → output latency. The 4 encoder inputs (RS-422, 1 MHz) can land a measuring wheel, a master-axis encoder for gear-in, or an SSI absolute multiturn for homing without an external encoder interface module. On a 3–5 axis converting line, the Siemens 6AU1240-1AB00-0AA0​ often requires zero expansion I/O — everything lands onboard.Scalable multi-axis coordination via DRIVE-CLiQ.​ Chained through CU320-2 control units (each CU320-2 manages up to 6 servo/vector axes in Servo mode, more in V/f), the C240 PN transparently spans cam/gear/path technology objects across CU boundaries. A single Siemens 6AU1240-1AB00-0AA0​ can coordinate 6–12+ axes comfortably, beating the D410-2’s 8-axis ceiling while staying below the D4x5 price tier.Engineering flexibility.​ Programmers can use MCC (graphical motion wiring), LAD, FBD, or ST inside SIMOTION SCOUT or TIA Portal. The Siemens 6AU1240-1AB00-0AA0​ supports the full SIMOTION technology object library — POS, GEAR, CAM, PATH — plus Java runtime for custom HMI or data-exchange logic. An Ethernet service port (separate from the PN IO ports) lands PG/PC for SCOUT downloads and online diagnostics; USB ports accept a service mouse/keyboard or flash drive for project backup — small conveniences that matter during a 10 PM machine startup.Security and lifecycle.​ Siemens addressed CISA ICSA-23-166-04 (unauthenticated TO-config extraction) starting V5.5 SP1. Running the Siemens 6AU1240-1AB00-0AA0​ on current firmware keeps the motion layer compliant in audited plants.