The Siemens 6SE7090‑0XX84‑3DB1 is a digital tachometer interface designed for Simvert Masterdrives (CUVC/CU2/FC series), converting HTL fan encoder signals into a 24 V logic output. This interface is essential for closed-loop feedback setups, supporting speeds from 1–6000 RPM. Though discontinued as of September 30, 2020, it remains available as a factory spare part.
Key Features
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Converts HTL-level digital tachometer inputs to 24 V DC logic for closed-loop drives
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Compatible with CUVC (vector control) and CU2 modules
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Input: HTL or TTL selectable via terminal block X402/X401
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Internal power: 15 V DC @ 160 mA; requires external 24 V DC tachometer supply @ 160 mA
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Frequency support: 1 Hz–up; precise speed feedback up to 6000 RPM
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Isolation/protection: galvanically isolated with short-circuit prevention
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Dimensions & Mounting: approx. 160 × 60 mm, DIN-rail snap-mountable; weight 0.28 kg
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