This document is the user manual for the Siemens G120 Control Unit CU240S. It introduces the features and characteristics of the product and provides guidance on installation, use, and maintenance.
The Getting Started guide introduces the CU240S control unit, outlines required safety precautions, and explains the documentation structure. It emphasizes qualified personnel, proper grounding, and discharge time before any work.
The manual covers installation of terminals and interfaces, a checklist, commissioning via STARTER, detailed technical specifications, and a diagnostics section with fault and alarm tables. It also describes LED status indicators and provides reference links for additional documentation.
| Operating voltage | 24 V DC |
|---|---|
| Control method | V/f control, output 0‑650 Hz |
| Digital inputs | Up to 9 programmable, isolated, PNP |
| Analog inputs | Up to 2 programmable, 0‑10 V / 0‑20 mA |
| Relay outputs | 3 programmable, 30 V DC, 0‑0.5 A |
| Dimensions (BxHxD) | 73 mm × 178 mm × 55 mm |
| Weight | 0.52 kg |
The Ready LED (RDY) is green and shows that the inverter is ready to run, but it does not indicate whether the drive is actually running.