Schneider NHA32172 02 I/O Terminal Board – ATV930 Series Spare

When This Board Is the Suspect

• NST（Freewheel Stop / No Start）with wiring confirmed — the drive displays NST and refuses to start. Schneider’s official guidance lists two-wire vs. three-wire control configuration, start-signal timing, freewheel-stop terminal not connected to 24 V, and inverter lock logic as primary causes.

• InF（Internal Fault）after grounding and shielding checks — Schneider lists improper grounding, control/power wiring separation failure, and high electrical noise as common causes of InF. 

• Control inputs not responding — start/stop or digital inputs are correctly wired and parameterized, but the drive does not respond. Damaged terminal contacts or poor clamping on the I/O board can interrupt the path.

Compatibility Check

Before ordering, confirm:

• Drive MLFB — the exact ATV930 catalogue number on the nameplate. This board is for ATV930, do not assume compatibility with ATV610 or ATV630 without verification.
• Original board marking — confirm the existing board reads NHA32172 02. The 02 suffix is part of the part number — do not substitute a different revision without confirming.
• Fault context — confirm the active symptom is terminal-level（NST or signal-path InF）. If the fault is a power-stage issue（SCF, OCF）, this board is not the primary target.
• If unsure, send a photo of the original board label and the drive nameplate before purchase.

FAQ

Does NST always mean the NHA32172 02 board is faulty?

No. NST indicates freewheel stop or no start command. Schneider lists two-wire/three-wire configuration, start-signal timing, freewheel-stop terminal wiring, and inverter lock logic as primary causes. Check these first; inspect the terminal board only if configuration and external wiring are confirmed correct.

Is this the main CPU board?

No. It is the I/O terminal board. The main control/CPU board is a separate assembly.

What does the “02” suffix indicate?

It is part of the part number NHA32172 02. Do not substitute a different suffix without confirming compatibility against the drive MLFB and the original board label.