Schneider 416NHM30030A Modbus Plus PCI Adapter Card

Description

Product Introduction & Engineering Value

The 416NHM30030A provides a legacy PC with direct access to a Modbus Plus network. It is a PCI expansion card rather than a Quantum rack I/O module, making it particularly useful when an engineering workstation, HMI computer, SCADA host, or diagnostic PC needs to communicate with existing Modicon equipment.

The important compatibility improvement over the original 416NHM30030 is PCI-bus flexibility. Schneider states that the 416NHM30030A supports both 3.3 V and 5 V PCI buses and fits PCI and PCI-X slots, although actual PCI-X operation remains dependent on the host motherboard.

Technical Specifications

Schneider’s official FAQ states that the A-version was introduced as an enhanced version of the earlier PCI SA85 card, adding support for both 3.3 V and 5 V PCI buses and mechanical compatibility with PCI-X slots. Schneider also states that the MBX Driver Suite recognizes the card as the 416NHM3003x and that it is backward compatible with MBX version 4.2b.

The manufacturer’s archived datasheet indicates that 416NHM30030A was discontinued June 12, 2014, with end-of-service listed as December 31, 2022, and no replacement assigned. That makes this a genuine legacy-network spare rather than a current-generation Modbus interface.

Field Application & the “Trench” Experience

A common failure scenario is an old SCADA workstation running perfectly well except for one problem: the PCI Modbus Plus card dies. The PLC network itself is healthy. Replacing the workstation with a modern PC would mean rebuilding drivers, applications, network configuration, and possibly unsupported legacy software.

That is where the 416NHM30030A remains useful. Instead of redesigning the communication architecture, maintenance can retain the existing Modbus Plus topology and restore the PC’s network interface with the original card family.

Specific application scenarios

Legacy Modicon PLC engineering workstation
Maintain PC-to-Modbus Plus communication for diagnostics and programming of installed Modicon systems.

SCADA host on an existing MB+ network
Allow a legacy supervisory computer to exchange process data with Modbus Plus nodes.

Machine-builder service PC
Provide direct network access for commissioning and troubleshooting equipment built around older Modicon controllers.

Modbus Plus network diagnostics
Use a compatible PC and driver environment to monitor and troubleshoot an established MB+ installation.

416NHM30030A

416NHM30030A

Transparency SOP: QA & Testing

For New Surplus or Refurbished inventory, the meaningful test is communication—not simply whether the card receives PCI power.

1. Part-number inspection
   Verify the complete 416NHM30030A marking and board revision.
2. PCB inspection
   Check the PCI edge connector, components, network connector, and board surface for contamination or physical damage.
3. Host recognition test
   Install the card in a compatible PCI system and confirm that the host detects the adapter.
4. Driver test
   Verify recognition using an appropriate MBX Driver Suite environment.
5. Modbus Plus communication test
   Connect to a known-good Modbus Plus network or test setup and confirm network participation.
6. Traffic verification
   Confirm that the PC can exchange data with an appropriate Modbus Plus node.
7. Final QA record
   Record the card number, hardware revision, host configuration, driver version, and communication-test result.

A supplier currently lists the unit as available in never-used surplus and used-surplus conditions, with its own functional warranty. That is supplier-level condition information and should not be confused with a current Schneider factory warranty.

The Veteran’s Tech Trap Guide

⚠️ Trap #1 — Confusing it with a Quantum PLC module.

The 416NHM30030A is a PC PCI adapter, not a module that plugs into a Modicon Quantum PLC backplane. Its host is a computer with a compatible PCI expansion slot.

⚠️ Trap #2 — Assuming any PCI slot will work.

Schneider specifically states that the A-version supports 3.3 V and 5 V PCI and can mechanically fit PCI-X slots. However, PCI-X compatibility does not guarantee that every motherboard will operate the card correctly. Schneider notes that PCI-X operation depends on motherboard support.

⚠️ Trap #3 — Replacing the card without checking the driver environment.

This is a legacy interface. The physical card is only half the solution. Verify the MBX Driver Suite version, operating-system compatibility, and the existing application before moving the card to another workstation.

PRO TIP: If the original SCADA or engineering PC is still operational, archive its driver package and network configuration before replacing hardware. Reconstructing a 15-year-old Modbus Plus workstation from memory is rarely a pleasant maintenance task.

Dynamic FAQ

What is Schneider 416NHM30030A?

It is a 1-port Modbus Plus PCI adapter card with drivers, designed to connect a PC to a Modbus Plus industrial network. Schneider identifies it as part of the Modbus Plus PCI SA85 product family.

What is the difference between 416NHM30030 and 416NHM30030A?

Schneider identifies 416NHM30030A as the replacement for 416NHM30030. The A-version supports both 3.3 V and 5 V PCI buses and provides mechanical compatibility with PCI-X slots.

Does 416NHM30030A have one or two Modbus Plus ports?

It has one Modbus Plus port. The dual-cable counterpart is 416NHM30032A.

Can it be installed in a PCI-X computer?

Mechanically, yes. Schneider states that the card fits PCI-X slots, but actual 33 MHz PCI-X operation depends on the motherboard.

Is 416NHM30030A discontinued?

Yes. Schneider’s archived product documentation lists it as discontinued on June 12, 2014, with end-of-service on December 31, 2022, and states that no replacement was assigned.

Is New Surplus the same as factory-new OEM stock?

No. New Surplus normally means unused inventory obtained through a secondary supply channel. For this discontinued card, request photographs of the actual PCB, complete part number, serial/traceability information where available, and evidence of PCI/Modbus Plus functional testing.

What warranty should I require?

For a discontinued networking card, obtain the supplier’s warranty and return terms in writing. A third-party one-year functional warranty, for example, is a seller warranty, not evidence of a current Schneider factory warranty.