Schneider Electric 990NAD23000 Modbus Plus Network Adapter | Replacement, Equivalent & Selection Guide
The Schneider Electric 990NAD23000 is a Modbus Plus (MB+) Network Adapter Module designed for the Quantum PLC platform. It enables high-speed peer-to-peer communication across Modbus Plus networks, supporting distributed I/O, drives, and HMI integration in demanding industrial environments. This page serves as a comprehensive selection, replacement, and compatibility reference for engineers and procurement teams.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 990NAD23000 |
| Brand | Schneider Electric (Modicon) |
| Series | Quantum PLC |
| Module Type | Modbus Plus Network Adapter |
| Network Protocol | Modbus Plus (MB+) |
| Communication Speed | 1 Mbps |
| Ports | 2 × Modbus Plus (DB9) |
| Max Nodes per Network | 64 |
| Power Supply | Backplane powered (5 VDC) |
| Operating Temperature | 0 °C to 60 °C |
| Humidity | 5% to 95% non-condensing |
| Certifications | CE, UL, cUL |
| Form Factor | Single-slot Quantum backplane module |
| Weight | Approx. 60 g |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the 990NAD23000. Always verify firmware, backplane, and network compatibility before substitution.
| Model | Brand | Type | Compatibility Notes |
|---|---|---|---|
| 990NAD23001 | Schneider Electric | Direct Successor | Upgraded firmware; drop-in replacement for most applications |
| 140NOE77100 | Schneider Electric | Ethernet Alternative | Modbus TCP/IP; requires network infrastructure change |
| 140NOE77101 | Schneider Electric | Ethernet Alternative | Enhanced Ethernet module; not MB+ compatible |
| 990NAD21100 | Schneider Electric | Earlier Variant | Single-port MB+; limited node support |
| BMXNOE0100 | Schneider Electric | M340 Platform | Different platform; requires system redesign |
⚠ Note: Cross-platform replacements require engineering review. Contact Konmask for a compatibility assessment.
Why Choose the Original 990NAD23000
- Proven MB+ Architecture: Native Modbus Plus support ensures zero protocol translation overhead and deterministic communication timing.
- Dual-Port Redundancy: Two MB+ ports allow daisy-chain or redundant ring topologies for high-availability systems.
- Backward Compatibility: Fully compatible with legacy Quantum racks and existing MB+ field devices without rewiring.
- Stable Supply: Konmask maintains verified stock of genuine and refurbished units with full traceability.
- Lower Migration Risk: Retaining the original module avoids costly re-engineering of proven control architectures.
Typical Applications
- Oil & gas process control — connecting remote I/O panels via Modbus Plus trunk
- Water treatment plant SCADA — peer-to-peer PLC communication across distributed stations
- Automotive assembly lines — drive and robot coordination over MB+ network
- Power distribution substations — legacy Quantum-based protection and monitoring systems
- Chemical plant DCS integration — bridging Quantum PLCs with Modicon Momentum I/O
System Compatibility
- PLC Platform: Schneider Electric Quantum series (140-series backplane)
- Compatible Racks: 140XBP01600, 140XBP00600, 140XBP00400, and all standard Quantum backplanes
- Compatible CPUs: 140CPU31110, 140CPU43412A, 140CPU65150, 140CPU65160 and most Quantum CPU modules
- Network Devices: Modicon Momentum, Modicon 800 series, ATV drives with MB+ option, Magelis HMI with MB+ card
- Software: Unity Pro, Concept, ProWORX — all support 990NAD23000 configuration
Selection Guide
Use the decision tree below to select the right module for your application:
- Existing MB+ network? → 990NAD23000 or 990NAD23001 (direct replacement, minimal disruption)
- Migrating to Ethernet? → 140NOE77100 / 140NOE77101 (requires Modbus TCP/IP infrastructure)
- Upgrading to M340 platform? → BMXNOE0100 (full platform migration required)
- Need redundant communication? → Dual 990NAD23000 modules in separate slots with ring topology
- Budget-constrained maintenance? → Certified refurbished 990NAD23000 from Konmask with 12-month warranty
Not sure which module fits your system? Contact our engineers for a free selection consultation.
Quality Assurance & Sourcing
- Source: Genuine Schneider Electric OEM units and certified refurbished stock
- Testing: Each unit undergoes functional power-on and communication port verification before shipment
- Traceability: Full batch and serial number documentation available on request
- Warranty: 12-month replacement warranty on all units sold by Konmask
- Packaging: ESD-safe anti-static packaging with foam insert protection
- Lead Time: In-stock units ship within 1–3 business days; contact us for bulk order scheduling
How to Order
- Confirm your part number: 990NAD23000
- Specify quantity and preferred condition (new OEM / certified refurbished)
- Add to cart or contact us directly for volume pricing and lead time confirmation
- Provide your shipping address — we ship worldwide via DHL, FedEx, and UPS
- Receive order confirmation with tracking number within 24 hours
📧 [email protected] | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Is 990NAD23001 a direct drop-in replacement for 990NAD23000?
A: In most cases, yes. The 990NAD23001 is the updated revision with enhanced firmware. Physical dimensions and backplane interface are identical. Verify your Unity Pro / Concept version supports the newer revision before swapping.
Q: Can I replace 990NAD23000 with an Ethernet module like 140NOE77100?
A: Not directly. The 140NOE77100 uses Modbus TCP/IP over Ethernet, which requires replacing all MB+ field devices or adding protocol converters. This is a network migration project, not a simple module swap.
Q: Does Konmask provide refurbished 990NAD23000 units?
A: Yes. All refurbished units are tested, cleaned, and shipped with a 12-month warranty. Certificates of conformance are available on request.
Q: What is the maximum cable length for Modbus Plus with this module?
A: The MB+ trunk cable supports up to 450 m per segment using Belden 9841 or equivalent shielded twisted-pair cable. Repeaters can extend the network.
Q: Is the 990NAD23000 still in production?
A: This module has reached end-of-life (EOL) status with Schneider Electric. Konmask specializes in sourcing and supplying EOL industrial components to support legacy system maintenance.
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Contact: [email protected] | +0086 19859288691
