Your needs, this model
Does it fit your priorities?
Can Ethernet combine Legal duplex, PIN release, 350 included sheets and 4,000 monthly pages?
Yes with compatible protected-job software. The exact wired configuration, paper table and actual PIN workflow support that arrangement.
Explore this need in the finder →Can its shared-network Apple/Android print support work while the printer is wired?
Yes on suitable reachable networking. Exact AirPrint and Mopria Print support is listed; a printer radio is not needed for that wired arrangement.
Explore this need in the finder →Does the base MS331dn provide a standard wireless computer connection?
No. Exact Wireless No and its actual ports establish a USB/Ethernet base configuration.
Explore this need in the finder →A compact wired model for ordinary monochrome work
The Lexmark MS331dn combines automatic two-sided printing, a two-line monochrome LCD and 350 sheets of supplied input in a small body. Exact US part 29S0000 includes USB Type-B and 10/100BaseTX Ethernet. It fits a documented 500–5,000-page recommended monthly routine when wired printing and supported confidential output matter more than an included wireless radio.
The read US page carries no discontinued banner, so this is a current manufacturer reference rather than a promise of stock, price or a newly introduced generation. Confirm the exact unit, regional supplies and intended software before buying. The official classification is print-only black and white; a software list mentioning AirScan or Mopria Scan does not add a physical scanner.
Connect by USB or Ethernet, then choose the right software
Wireless is explicitly No on this exact dn specification. USB Type-B is the computer interface, while Ethernet provides a conventional shared network connection. The separate Direct USB No field concerns another direct-print facility; it does not cancel the positively listed USB computer port.
The exact page lists AirPrint and Mopria Print support. A compatible mobile device can use suitable shared networking that reaches the wired printer. The device and network discovery conditions still matter, but an included printer radio is not needed for that arrangement. Do not promote this as built-in Wi-Fi or Wi-Fi Direct.
The original guide also gives actual confidential-job routines. Compatible Windows software uses Print and Hold; Mac software can expose PIN Printing through AirPrint or a confidential-job driver option. A four-digit PIN controls release at the printer panel. Verify the intended application and firmware, because an ordinary mobile print button need not expose the same protected-job controls.
The 350-sheet input is split between two sources
Included input combines a 250-sheet drawer and 100-sheet multipurpose feeder on the stated 20-pound or 75-gsm basis. The original paper table supports Letter, Legal and A4 in both sources and automatic duplex. A suitable combined ordinary-paper load can therefore use the total, but it remains two sources rather than one enclosed drawer.
Set the guides and size/type for the actual media. Matching source settings matter when linking loads, while separate types help keep special stock from being substituted accidentally. Suitable envelopes have a separate one-sided multipurpose-feeder routine; they are not automatic-duplex or main-drawer media.
An optional 550-sheet drawer raises maximum input to 900. Confirm actual installed hardware and recognized driver options if that expansion is essential. The 150-sheet output bin is separate, so a longer queue can still require collection even when plenty of input paper is available.
Use the correct speed mode and regular-volume figure
Maximum one-sided Letter output is declared at 40 pages per minute. Automatic duplex is separately 17 Letter sides per minute. Neither is a measured application result or a guarantee that a particular short or complex job will finish at the continuous simplex rate.
Recommended monthly volume reaches 5,000 pages; maximum duty is separately 50,000. The larger number does not extend the ordinary recommendation. If the queue regularly exceeds the recommendation or the supplied input arrangement, compare a configuration documented for that need rather than judging only the speed headline.
Specific supplies and space for operation
The original US starter toner declares 1,500 pages. Exact replacements include 55B1000 at 3,000 and 55B1H00 or 55B0HA0 at 15,000 under ISO/IEC 19752. Do not borrow the MS431's 20,000-page option. The separate 40,000-page imaging unit uses its own job and coverage conditions; yields do not establish current running cost.
Match cartridge region and Return Program terms. The body is 14.5 inches wide, 14.3 deep and 8.7 high at 20.6 pounds, before loading and service access. Inspect the actual electrical label and correct cord. Choose different hardware if scanning, copying, fax or printed color is part of the work.
Key details at a glance
| Color printing | No |
|---|---|
| Scanner | No |
| Copying | No |
| Fax | No |
| Flatbed scanner | No |
| Automatic document feeder | No |
| Automatic two-sided printing | Yes |
| Automatic two-sided scanning | No |
| Single-pass two-sided scanning | No |
| Color scanning | No |
| Instructed envelope handling | Yes |
| Apple AirPrint | Yes |
| Mopria printing | Yes |
| Supported PIN-release printing | Yes |
| Recommended monthly minimum | 500 pages |
| Recommended monthly maximum | 5000 pages |
| Maximum monthly duty | 50000 pages |
| Included ordinary-paper capacity | 350 sheets |
| Declared one-sided mono Letter rate | 40 pages/min |
| Unit-body width | 14.5 in |
| Unit-body depth | 14.3 in |
| Unit-body height | 8.7 in |
| Unit weight | 20.6 lb |
| Imaging engine | laser |
Use the exact model’s instructions for operating limits, supplied equipment and version differences.
Paper, software and setup details
Print-rate conditions
Manufacturer maximum 40 one-sided Letter pages/minute; automatic duplex separately 17 Letter sides/minute. Declared modes, not article measurements.
Paper handling
Included 250-sheet drawer and 100-sheet multipurpose feeder total 350 at 20 lb/75 gsm. Letter, Legal and A4 fit both ordinary sources and automatic duplex. Match guides and size/type. Suitable envelopes use a separate one-sided multipurpose routine. One optional 550-sheet drawer raises maximum to 900 and is not included.
Scanning arrangement
Official hardware classification is print-only monochrome laser. Generic AirScan, Mopria Scan and scan/fax driver text do not add a scanner, copier, fax or ADF.
Computer and mobile connections
Included USB Type-B computer and 10/100BaseTX Ethernet. Exact Wireless No; no standard Wi-Fi or Wi-Fi Direct arrangement. AirPrint/Mopria use suitable shared networking, with reachable compatible devices.
Supplies and declared yields
US supplied Return Program toner 1,500 pages. Exact 55B1000 replacement 3,000; 55B1H00/55B0HA0 15,000 under ISO/IEC 19752. Separate 55B0ZA0 imaging unit 40,000 has its own job/coverage basis. No MS431 20,000-page option borrowed; regional restrictions and Return Program terms apply.
Software and support
Two-line monochrome LCD with buttons. Original guide documents Windows Print and Hold plus Mac AirPrint PIN Printing or compatible driver confidential jobs, with four-digit PIN and panel release. Confirm actual software/firmware and job controls; not every mobile print button submits a protected job. Exact AirPrint/Mopria protocol listings and shared-network conditions apply.
Electrical edition and setup
Exact US model and unit-body dimensions established. Nominal mains input remains unestablished in the read sources; inspect actual rating label and correct cord. Allow paper loading, output and service access beyond the closed body.
Sources for this assessment
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