Built to last – Tough desktop printer ideal for demanding environments

The robust ML3321eco dot matrix printer provides consistent, reliable performance with a high mean time between failures (MTBF) of 10,000 hours.

  • High durability 9-pin print head
  • High mean time between failures of 10,000 hours
  • USB and Parallel interfaces with RS232 and Network options
  • OKI Microline, IBM and Epson emulations

Efficient performance – Prints up to five copies of wide format documents simultaneously

The ML3321eco efficiently produces up to 5 copies simultaneously with fast print speeds of up to 435 characters per second (cps).

  • Up to 435 characters per second (cps)
  • Multi-part paper handling (original + 4 copies)
  • Scalable fonts and barcode support
  • Low-tear and auto-park help eliminate wastage

Multiple copies – High-speed data listing and multi-part forms applications

Printing a range of documents including receipts, invoices, picking lists, reports and spreadsheets with flexible paper handling, the ML3321eco dot matrix printer features top, bottom and rear paper input paths and built-in rear push tractor feed unit, along with a long-life, easy-to-change cartridge ribbon.

  • Optional bottom push and top pull tractor units
  • Easy-change 3 million character cartridge ribbon

Power-saving – Low running costs with OKI’s system on chip (SoC) technology

Helping to minimise running costs, OKI’s system on chip (SoC) power management technology reduces energy consumption.

  • Eco-friendly technology, sleep mode consumes just 1.5W

Specifications

Printing Technology Serial Impact Dot Matrix Method
Print Head 9 Pin
Dot Wire Diameter 0.34 mm
Print Direction Bidirectional/Unidirectional printing, Short line-seeking printing
Graphic Resolution Max. 240(H) x 216(V) dpi
Print Speed Super Speed Draft : 435 cps, High Speed Draft : 387 cps, Utility : 290 cps, Near Letter Quality : 73 cps
Line Feed Pitch 4.23mm (1/6 “), 3.18mm (1/8 “), n x 0.35mm(n/72 “) (n=1-85), n x 0.18mm(n/144 “) (n=0-255), n x 0.12mm(n/216 “) (n=0-255)
Feed Speed 4.5 inches per second
Feed Rate 4.23mm(1/6”) line feed: Approx. 48 milliseconds
Paper Route Manual (Top), Tractor feeder (Rear), Tractor feeder (Bottom), Cut sheet feeder (Rear)
Character Pitch Super Speed Draft : 12.0 cpi
High Speed Draft : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi
Utility : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi, Propotional
Near Letter Quality : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi, Propotional
Printing Width 136 characters/line at ANK 10 cpi
Interface IEEE1284-1994 Bi-directional Parallel, USB 2.0 (Full Speed), (Optional) 100BASE-TX/10BASE-T, (Optional) RS-232C (25pin)
Emulation OKI Microline, ESC/P emulation, IBM ProPrinter emulation
Supported OS Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 x64, Windows Server 2003, Windows Server 2003 x64
Receive Buffer Max. 128KB
Resident Font High Speed Draft, Utility, NLQ Courier, NLQ Gothic, Scalable Courier, Scalable Gothic, OCR-B
Font Style Bold, Double Width, Double Height, Emphasized, Italics, Over score, Underline
1-D Barcode UPC-A, UPC-E, EAN8, EAN13, Code39, Interleaved 2 of 5 (ITF), Code128, POSTNET, Codabar (NW-7), Industrial 2 of 5, Matrix 2 of 5
Paper Type Continuous paper, Continuous copying paper, Cut sheet, Card, Envelope, Label
Paper Weight Adjustment Manual
Paper Size Continuous paper: Width 76.2-406.4mm x Length 76.2-355.6mm
Single part paper: Width 99.1-363.2mm x Length 99.1-356.0mm
Multi part paper: Width 76.2-406.4mm x Length 76.2-355.6mm
Paper Weight Continuous paper : 45 – 90 gsm
Single part paper : 45 – 90 gsm
Multi part paper : 35 – 40 gsm
Copy Capability Normal print mode: original + 4sheets(Total Thickness < 0.36mm)
Dimensions(WxDxH) 552 x 345 x 147 mm
Operating Environment Operating: 5 – 35 °C, 20 – 80 %RH
Storage: -10 – 50 °C, 5 – 95 %RH
No condensation
Power Source Single phase 220 – 240 VAC ±10%, 50/60 Hz ±2%
Power Consumption Operating: Max. -W (ISO10561 (Utility, Range1) Printing Approx. 36W)
Power Save: < 1.7W
Safety & Environment Regulation Energy Star, CE Mark, EMC-Directive, GS Mark
Noise Level Operating :Approx. 57 dBA
Idle: < 0 dBA
Power Save: < 0 dBA or Background level
Quiet Mode: < 52 dBA
MTBF(Mean Time Before Failure) 10,000 hours
Ribbon Life Black : 3 million characters
Print Head Life *1 Approx. 450 million strokes/ pin
In the Box Ribbon cartridge, Power cable, CD-ROM, Others

Footnotes;

*1 Average in 10cpi utility mode at 25%duty and 35% page density