ABB NINT-41C Communication Board – Profibus DP & DeviceNet Adapter

Description

Description

The NINT-41C​ is an ABB communication board designed as an Option-slot fieldbus adapter for the ACS600 series medium-voltage and multi-drive inverter family. It plugs into the NIOC (Network I/O Controller) carrier inside the drive cubicle, hooks to the internal RMIO/Drive-CU world over DDCS fiber backbone, and breaks out to the plant fieldbus—typically Profibus DP or DeviceNet—via a 9-pin D-SUB, with an auxiliary RJ45 (10/100 Mbps Ethernet) for commissioning and diagnostics. The “-C” suffix denotes the EMC-hardened revision of the original NINT-41, with improved noise immunity for heavy-arc environments (rolling mills, cranes, marine propulsion). When the NINT-41C​ is healthy, the ACS600 appears as a well-behaved DP slave or DeviceNet node to the upstream PLC/DCS; when it drifts, you get “Option Mismatch,” PPCC link errors, or cyclic PPO timeouts.h2 Application ScenariosOn a hot-strip pickle-line bridle drive (four ACS600 inverters on a common DC link, controlled by an S7-400 via Profibus DP), the No. 2 bridle motor began logging sporadic “PPCC Link” faults every 3–5 days—always during the weld-pass when the arc-welder downstream kicked in and dumped HF noise onto the cubicle’s 24 V backplane. The original NINT-41 (non-C) was on the NIOC’s Option 2 slot; the service lead swapped to a NINT-41C, leveraging the C-rev’s tighter EMC filtering on the DDCS receiver and the 9-pin D-SUB shield path. The DP master (CP443-5) went from 3–4 cyclic retries per shift to zero over the next 11 months. Post-swap, the NINT-41C​ enumerated cleanly—no parameter re-entry needed because the ACS600’s 98-group fieldbus parameters live on the NIOC/RMIO, not on the Option card itself. The drive engineer’s note: “The NINT-41C​ is a 10-minute swap that bought us another five years before the ACS880 migration.”h2

Parameter