Speedy results – Super-fast high-volume data listing and multipart forms

Super-fast and efficient, the ML5520eco delivers rapid print speeds of up to 570 characters per second (cps). A long-last rack-and-pinion drive system and a protective, impact-resistance chassis, make the long-lasting device tough enough to withstand demanding environments.

  • 80-column dot matrix printer
  • Up to 570cps print speed
  • High mean time between failures (MTBF) of 20,000 hours

Versatile application – Handles heavy paper and labels

Managing cut sheets, continuous feed paper and multi-part forms with ease, the ML5520eco’s flexible paper handling makes it ideal for a wide range of retail, industrial and business applications. Optional bottom push and top pull tractor units are available for loading two media types simultaneously or for feeding heavier papers and labels.

  • Top, bottom and rear paper input paths, built-in rear push tractor feed unit
  • Optional bottom push and top pull tractor units
  • Low-tear and auto-park features accurately position continuous forms at the perforation, helping to eliminate paper waste
  • Roll paper stand option available for printing passenger lists, call logs, data logs and other long documents

High-volume documents – Fast, reliable throughput ideal for continuous forms printing

The reliable ML5520eco dot matrix printer powers through picking lists, reports, spreadsheets and other documents, printing up to 6 copies. Easy-to-use and with barcoding facilities, it is well-suited to forms printing at customer service points in wholesale and service environments.

  • Multi-part paper-handling (original + 5 copies)
  • Scalable fonts and barcode support
  • USB and Parallel interfaces with RS232 and Network options
  • OKI Microline, IBM and Epson emulations

Eco-features – Durable print head and in-built power-saving technology

Combining long-lasting consumables with power-saving OKI system on chip (SoC) technology, the ML5520eco dot matrix printer is cost-effective with low running costs.

  • Eco-friendly technology, sleep mode consumes just 1.5W
  • Powerful, highly durable 9-pin print head
  • Easy-change 4 million character cartridge ribbon


Printing Technology Serial Impact Dot Matrix Method
Print Head 9 Pin
Dot Wire Diameter 0.3 mm
Print Direction Bidirectional/Unidirectional printing, Short line-seeking printing
Graphic Resolution Max. 240(H) x 216(V) dpi
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 Tractor feeder (Rear), Tractor feeder (Bottom), Manual (Top), Roll paper stand, 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 80 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 76.2-254.0mm x Length 76.2-355.6mm
Single part paper: Width 99.1-216.0mm x Length 99.1-356.0mm
Multi part paper: Width 76.2-254.0mm 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 + 5sheets(Total Thickness < 0.36mm)
Dimensions(WxDxH) 398 x 345 x 153 mm
Operating Environment Operating: 5 – 36 °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. 51W)
Power Save: < 1.7W
Safety & Environment Regulation Energy Star, EMC-Directive, CE Mark, GS Mark
Noise Level Operating :Approx. 56 dBA
Idle: < 0 dBA
Quiet Mode: < 52 dBA
MTBF(Mean Time Before Failure) 20,000 hours
Ribbon Life Black : 4 million characters
Print Head Life *1 Approx. 600 million strokes/ pin
In the Box Ribbon cartridge, Power cable, CD-ROM, Others


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