ABB NINT-44​ (61353261E) Communication & System Interface Board — ACS600 Drive, 8 DI + 4 RO, DDCS Fiber + Ethernet

Product Overview

The ABB NINT-44​ (internal article reference 61353261E) is a system-interface and communication card purpose-built for the ABB ACS600 series of low-voltage and medium-voltage drives, sitting internally in the ACS600 inverter’s control-section card cage as the “diplomat” between the drive’s internal DDCS fiber bus and the plant’s external automation layers. Where the newer ACS800 generation uses the NDCU-04 + AINT-14 + NETH-x piggyback split, the ACS600 architecture consolidates more onto fewer cards, and the NINT-44​ is one of the key consolidated boards — it carries 8 digital inputs and 4 relay outputs for local signal handling (start/stop, enable, fault relay, ready contact, watchdog) while simultaneously hosting the protocol-conversion engine that bridges DDCS (the ABB-proprietary fiber bus running between ACS600 inverter books, between drive and master controller, or between drive and optional expansion) out to Ethernet (TCP/IP, Modbus TCP), Profibus DP, Modbus RTU, and EtherNet/IP depending on firmware/image. In practical terms, the NINT-44​ is the card you reach for when an ACS600 cabinet “drops off the network” or when a retrofit needs to add Ethernet to a legacy DDCS-only multi-drive line without ripping the whole control architecture.The NINT-44​ evolved from the NINT-43C (which was primarily a DDCS fiber interface) by adding the RJ45 Ethernet port and TCP/IP stack — hence the “44” suffix and the 61353261E article number. Externally the NINT-44​ presents: two ST multi-mode fiber ports (V41/V42, DDCS, up to ~100 Mbps, ≥2000 V AC isolation to ground), one RJ45 10/100 Mbps for Ethernet/Modbus TCP, one D-sub 9-pin for Profibus DP or Modbus RTU, and the internal board-to-board header that lands the 8 DI / 4 RO terminals and draws 24 V DC (~8 W) from the ACS600’s internal auxiliary SMPS. Physical envelope is compact — roughly 120 × 75 × 28 mm, ~0.24 kg, standard ACS600 card-cage slot, IP20 (cabinet internal), –20…+70 °C operating range suited to drive MCC ambient. LED indicators on the face show power, link, and fault states, and ABB’s DriveWindow tool can talk to the NINT-44​ over the Ethernet or DDCS path for online diagnostics and parameter backup.Lifecycle-wise, the NINT-44​ (and the ACS600 platform broadly) is discontinued by ABB for new design-in — greenfield today would be ACS880 with RMIO/NAIO + NETA/NETB communication modules — but the ACS600 installed base remains very large across metals, paper, mining, cement, water, and wind, which keeps NINT-44​ active in spares channels. It is mechanically and firmware-compatible as a sequential upgrade from NINT-42C / NINT-43C in the same ACS600 slot — swap in a NINT-44, configure ethernet address and protocol in the drive parameters, no control-program rewrite needed, which is why plants on frozen ACS600 BOMs standardize on NINT-44​ as the unified spare even if some slots currently carry -43C.

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Description

 

Technical Specifications

Parameter Name Parameter Value
Product Model NINT-44​ (also written NINT44)
Article Reference 61353261E
Manufacturer ABB Oy / ABB Drives
Product Type System Interface & Communication Card (ACS600)
Compatible Drive ABB ACS600 series (single-drive & MultiDrive, LV & MV)
Digital Inputs 8 ch (24 V DC class, internal sinking/sourcing per ACS600 spec)
Relay Outputs 4 ch (potential-free NO/NC, typical 250 V AC / 2 A rating)
Fiber Interface 2× ST multi-mode (DDCS bus, up to 100 Mbps, ≥2000 V AC isolation)
Ethernet RJ45, 10/100 Mbps, TCP/IP, Modbus TCP
Fieldbus Profibus DP V1 (D-sub 9), Modbus RTU, EtherNet/IP (fw-dep)
Power Supply 24 V DC ±10 %, ~8 W (from ACS600 internal auxiliary SMPS)
Isolation ≥2500 V AC (fiber port to ground, control/power separation)
Mounting ACS600 internal card-cage slot (not DIN-rail)
Dimensions (mm) ~120 × 75 × 28 (sources vary 120–205 × 75–140; 61353261E Rev. C typical ~120 × 75)
Weight ~0.24 kg
Operating Temp. –20 … +70 °C
Protection IP20 (cabinet internal)
Predecessors NINT-42C (main IF), NINT-43C (fiber DDCS, no Ethernet)
Successor Platform ACS800/ACS880 (RMIO + NETA/NETB, not directly compatible)

 

Main Features and Advantages

Consolidated System Interface + Communications.​ The NINT-44​ does two jobs that on newer platforms are split across two or three modules. First, the system-interface job: the 8 DI and 4 RO on the NINT-44​ land the drive’s local control and status signals — start/stop pushbutton, enable from upstream guard, reset, fault-relay to MCC beacon, ready contact to PLC DI, watchdog to annunciator. These are wired to the NINT-44‘s terminal header (via the ACS600 control-terminal strip that fronts the card cage), not to a separate digital-I/O module, which keeps the ACS600 inverter book compact. Second, the communications job: the same NINT-44​ hosts the protocol stack that translates between the ACS600’s internal DDCS fiber world and the plant’s Ethernet/Profibus/Modbus layer. A single NINT-44​ therefore replaces what on an ACS800 would be “AINT-14 + NDCU-04 + NETH-21 + a few DI/DO terminals” — fewer cards, fewer spares SKUs, simpler BOM. For OEMs who standardized on ACS600 for a generation of machinery (paper-machine sections, mine-winder drives, cement-kiln ID fans), the NINT-44​ is the one-card solution that keeps the inverter book’s BOM lean.Dual ST DDCS Fiber + Multi-Protocol External.​ The two ST multi-mode ports (V41/V42) implement ABB’s DDCS (Distributed Digital Control System) fiber bus — this is the high-speed, optically isolated backbone that links multiple ACS600 inverter books in a MultiDrive chassis, or links the drive to an optional master controller (e.g., an ABB AC 800M / Advant OCS via a fiber interface). DDCS runs ~100 Mbps, galvanically isolated (≥2000 V AC fiber-to-ground), immune to the EMI that swirls around a drive MCC room — important when the ACS600 sits next to 690 V IGBT switching. Off that same NINT-44, the RJ45 adds Ethernet (TCP/IP + Modbus TCP, 10/100 Mbps) and the D-sub 9 adds Profibus DP V1 or Modbus RTU — so the same inverter can talk DDCS to its sister books in the MD chassis and simultaneously talk Modbus TCP to a plant-level SCADA or Profibus to an S7-400, without extra gateway hardware. The NINT-44​ effectively bundles what used to be “NINT-43C (fiber) + external gateway” into one slot.Seamless Upgrade from NINT-42C / NINT-43C.​ Plants that originally built ACS600 cabinets with NINT-42C (main system IF) and NINT-43C (fiber DDCS, no Ethernet) can slot a NINT-44​ into the same cage position — the 61353261E retains the same mechanical envelope and board-to-board header, and the ACS600 drive firmware recognizes it as a compatible IF card. After the swap, the engineer configures the Ethernet address and protocol in the drive’s Group 98 (communication) parameters; the core control program (motor data, ramp, torque/speed cascade) lives on the ACS600’s main CPU board, not on the NINT-44, so no CFC or CoDeSys rework is needed. This is the primary reason NINT-44​ has become the de-facto spare standard for ACS600 fleets — even slots that originally held -43C get upgraded to -44 when the card fails, gaining Ethernet visibility for free.8 DI + 4 RO Local I/O.​ The digital side of the NINT-44​ is not an afterthought — 8 DI at 24 V DC (sinking/sourcing per ACS600 terminal-scheme) covers the typical drive’s local-needs: DI1=Start, DI2=Stop/Enable, DI3=Reset, DI4=Ext-Fault-Ack, DI5=Speed-Ref-Select-High, DI6=Local/Remote, DI7–8=spare/aux. The 4 RO relays (potential-free NO/NC, typical 250 V AC / 2 A) drive the fault-relay pair (one NO for beacon, one NC for safety-chain), the ready-contact to PLC DI, and a spare for watchdog or annunciator. Having these on the NINT-44​ itself means the ACS600 inverter book needs no external DI/DO terminal block — the control-cage terminal strip fronts the card, and wiring lands there. For retrofits where an old NINT-42C is failing and the plant wants fewer spare SKUs, swapping to NINT-44​ (which subsumes both -42C and -43C roles on some BOM variants) can consolidate two card-cage slots into one — though verify the exact ACS600 build: some cabinets separate “system IF” (NINT-42C) and “fiber IF” (NINT-43C) into two slots, and the NINT-44​ may replace only the -43C slot while the -42C stays — ABB’s ACS600 manual defines the slot-map, and the spare buyer should cross-check.DriveWindow Diagnostics & Non-Hot-Swap.​ The NINT-44​ is visible to ABB DriveWindow over Ethernet (RJ45) or over DDCS (via a fiber adapter), letting a commissioning engineer pull parameter backups, stream fault buffers, and watch drive-state online without opening the cabinet door. Important warning: the NINT-44​ is not​ hot-swappable — unlike some modern ET 200 or Profinet IO modules, pulling/reseating the NINT-44​ while the ACS600 is powered will damage the board and possibly the backplane header. Swap requires full LOTO on the ACS600 3-phase supply, discharge of DC-link, and confirmation that the 24 V DC auxiliary (internal SMPS) is also down — only then unclip the NINT-44​ from the card cage. This is a common mistake on Friday-night callouts (“the network dropped, I’ll reseat the comms card live”) that turns a comms fault into a scrapped NINT-44.

Contact Us WhatsApp / Wechat：+86 18150087953
Phone：+86 18150087953
Email：sales@cxplcmro.com

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