Siemens 6SL3040-1MA00-0AA0 SINAMICS S120 Control Unit CU320-2 DP PROFIBUS 24 V DC Drive Control Unit

The Siemens 6SL3040-1MA00-0AA0 is the CU320-2 DP Control Unit for the SINAMICS S120 modular drive system, communicating via PROFIBUS DP and supplied without a CompactFlash card. It accepts a 24 V DC electronics supply (20.4–28.8 V), draws a maximum of 1.0 A, and coordinates up to four DRIVE-CLiQ axes through its four onboard DRIVE-CLiQ ports.

Technical Specifications

Selection Notes

The CU320-2 DP variant uses PROFIBUS DP as its primary fieldbus, making it the correct choice for S120 installations where the higher-level controller (e.g., a SIMATIC S7-300/400 with a CP 342-5 or an S7-1500 with a CM 1542-5) communicates over PROFIBUS rather than PROFINET — the CU320-2 PN handles the latter. Four DRIVE-CLiQ ports allow direct topology management of up to four Motor Modules or Smart Line Modules without external DRIVE-CLiQ hubs, which simplifies cabinet wiring in multi-axis servo applications. The unit ships without a CompactFlash card (order separately), so firmware and drive parameters are loaded from an external card — factor this into commissioning planning. At a 2,000 m installation ceiling with a 55 °C upper operating limit, no derating is required for the majority of standard industrial installations.