The Grundfos CUE product guide explains features, installation, operation and technical data for the frequency converters used with Grundfos pumps.
The guide introduces the Grundfos CUE series of frequency converters, describing their purpose for speed control of a wide range of Grundfos pumps. It outlines the built‑in E‑pump functionality, power‑supply options and enclosure classes.
Detailed sections cover user interface options, control modes, input/output configurations, accessories, application fields, installation guidelines, and full technical specifications such as dimensions, weight and wiring requirements.
| Power supply voltage options | 3 × 525‑690 V, 3 × 525‑600 V, 3 × 380‑500 V, 3 × 200‑240 V, 1 × 200‑240 V |
|---|---|
| Enclosure class | IP21 (NEMA 1) or IP55 (NEMA 12) |
| Analog inputs | 1 × 0‑10 V/4‑20 mA external set‑point, 1 × 4‑20 mA sensor input |
| Digital inputs | 4 digital inputs (start/stop + 3 programmable) |
| Signal relays | 2 × C/NO/NC programmable relays |
| RS‑485 interface | GENIbus connection |
| Typical enclosure dimensions (A2) | Height 10.55 in (268 mm), Width 10.12 in (257 mm), Depth 3.54 in (90 mm) |
| Weight (A2 enclosure) | 8.08 lb (205 kg) |
The CUE has two analog inputs: one 0‑10 V/4‑20 mA external set‑point input and one 4‑20 mA sensor input.
The CUE is offered in IP21 (NEMA 1) and IP55 (NEMA 12) enclosure classes.