Analog I/O and environmental limits
The 3ADT218520S0241: The converter carries three analog inputs and two analog outputs, enough for speed reference, current feedback, and a speed-proportional retransmit without an external I/O module. Operating humidity spans 5 to 95% RH, and the auxiliary terminals are rated IP00 per IEC 60529 and IEC 60947-1 — meaning they are not touch-protected in the terminal box; panel builders must plan for finger-safe shrouds or a separate enclosure.
Acoustic and mains frequency
Sound pressure level is listed at 60 dB(A), which is typical for a converter of this frame size and current — no special acoustic enclosure needed for most industrial floors. The unit is specified for 50 Hz mains; if the site runs 60 Hz, verify the DC-link ripple and any de-rating with the drive configuration tool.
Active lifecycle status means this order code is the current production variant. No last-time-buy window or successor part number is in effect.