Okidata ML690 and ML691


Looking for a replacement model for ML690? Try this 2600

Looking for a replacement model for ML691? Try this 2610

Okidata ML690 Printer
Okidata ML691 Printer
Looking for Oki 690 & 691 Parts?
Warranty EnhancementsSKU
ML690/691 Series 3 year Exch. (WEP)38022703

ML690/691 Series 4 year Depot (WEP)38022604

ML690/691 Series 4 year Exch. (WEP)38022704

ML690/691 Series 5 year Depot (WEP)38022605

ML690/691 Series 5 year Exch. (WEP)38022705

Ribbon Cartridge (ML620/690) 8MM Char.44173403
OkiLAN 6020e+ 10/100Base-TX Ethernet External Print Server70036002
OkiLAN 6130 10/100 Base-T Ethernet Internal Print Server72008701
RS232C Serial Card44455101
Paper HandlingSKU
Front/Back Push Tractor (ML620/ML690)44454901
Roll Paper Stand for ML320/T/D, ML390/T, ML420/490, ML520/59070023301
Top Pull Tractor (ML620/ML690)44753901

  • Dual 9-pin and 24-pin dot matrix printing
  • Best-in-class reliability: 25,000-hour MTBF
  • Convenient front paper feed
  • Fastest-in-class print speeds: up to 700 cps1
  • Up to 13 million-character ribbon life2
  • USB and Parallel connectivity standard
  • Crisp, clear printing - on letterhead or up to 7-part forms3
  • 128 KB receive buffer/memory
  • 400-million character printhead life
  • ENERGY STAR compliant
  • Options include internal Ethernet and Serial connectivity; front/rear tractors; top pull tractor; cut sheet feeder; roll paper stand5
  • 3-year standard warranty with extensions4
  • Live, toll-free technical support, 24/7/3654

1ML620/621 SuperSpeed Draft; ML690/691 up to 480 cps.
2ML621/691 at 13 million; ML620/690 at 8 million-character life.
37 sheets max with optional top pull tractor.
4Available in the U.S. and Canada only.
5Roll paper stand for ML620/ML690 only.

* Please check the product brochure (PDF) for additional part numbers/SKUs.
** Published performance results based on laboratory testing. Individual results may vary.

The MICROLINE (ML) 600 Series from OKI Printing Solutions: high-volume versatility in forms and correspondence.

Whether your output is continuous multi-part forms or fine business correspondence- or combinations of both- you'll find your solution in the Dual 9-pin ML620/621 or the 24-pin ML690/691 dot matrix printers.
They handle the printing needs of the most demanding environments-including point-of-sale, automation and utility applications such as wholesale or retail sales counters, financial departments, manufacturing and warehousing.

Yet they also produce letter-quality type and high-resolution graphics for the office and executive suite.

Unequaled performance- ML600 Series printers have features that give them a strong edge over the competition:
- - Print speeds of up to 700 cps1
- - An MTBF rating of 25,000 hours
- - Ribbon life of up to 13 million characters2

And they offer other features that will improve your working conditions, including:
- - A convenient front paper path (tractor feed and friction feed)
- - Printing on forms up to 7 parts3
- - Versatile connectivity and paper handling

Fast, with finesse- ML600 Series printers run the gamut of paper types and envelopes at lightning speed. Their rugged printheads have a 400 million-character average life expectancy, with powerful samarium magnets and stored-energy pins that deliver precise, sharp characters through to the last page of a 7-part form3.

Sturdy and sophisticated- Field-proven reliability is just one reason OKI MICROLINE printers are the most widely-used impact printers in North America4. The rugged, reliable OKI ML600 Series printers are sure to win you over, too!

Step up to superior performance- OKI Printing Solutions provides products that increase our customers- performance without affecting their budget. That's because the tradition of the OKI brand is one of proven reliability and value.

Should you need technical assistance, you can speak to a live expert located in North America- 24/7/365- by calling toll-free: 800-OKI-DATA (800-654-3282).5

You can expect more from MICROLINE 600 Series printers: faster speeds... better performance... greater reliability.

1ML620/621 SuperSpeed Draft; ML690/691 up to 480 cps.
2ML621/691; ML620/690 at 8 million-character life.
37 sheets max with optional top pull tractor.
4IDC Quarterly Tracker, 2010.
5Available in the U.S. and Canada only.
6Roll paper stand for ML620/ML690 only.

Detailed Specifications: Side-by-Side Comparison

Print Speed And Quality
Super Speed
Draft (cps)**
High Speed Draft (cps)480480
Utility Speed (cps)360360
Near Letter Quality Speed (cps)120120
Number Of Colors11
Maximum Graphics Resolution (dpi)360 (H) x 360 (V)360 (H) x 360 (V)
Fonts and Bar Codes
Resident Scalable FontsCourier, Roman and Swiss 8-64 pt.Courier, Roman and Swiss 8-64 pt.
Resident Bar Code FontsUPC A, UPC E, EAN 8, EAN 13, Code 39, Interleaved 2 of 5, Code 128 (A, B, C), PostNet, CodaBar (NW-7), Industrial 2 of 5, Matrix 2 of 5
Paper Handling
No. Of
Original + 63Original + 63
Automatic Paper Forms LoadingYesYes
Zero Tear OffYesYes
Bottom FeedBottom Pull TractorBottom Pull Tractor
Top Pull TractorsFront/Bottom Pull TractorFront/Bottom Pull Tractor
Push TractorsFront/Back Push with Zero TearFront/Back Push with Zero Tear
Front FeedFront/Top Friction FeedFront/Top Friction Feed
Paper Feed Rate (inch per second)5.55.5
Cut Sheet Feeder OptionYesYes
Roll Paper Stand OptionYesYes
Parallel InterfaceIEEE Bi-directional StandardIEEE Bi-directional Standard
Serial InterfaceOptionalOptional
USBUSB 2.0 StandardUSB 2.0 Standard
Number of Pins2424
Printhead Life (characters)400 million characters at 25% duty cycle400 million characters at 25% duty cycle
Memory Buffer Size128 KB128 KB
MTBF (hours)
Monthly Workload (pages)2300014000
Operating / Physical Specifications
Noise Level In Operating Mode (dBA)5757
Noise Level In Quiet Mode (dBA)5252
Ribbon Life (characters)8 million characters13 million characters
Power Voltage120V120V
EPA Energy Star ComplianceYesYes
Dimensions Of Narrow Carriage w/out Box
(W x D x H) (inches)
17.2 x 14.8 x 7.5 inches23.3 x 14.8 x 7.5 inches
Weight Of Narrow Carriage w/out Box (lb.)16.8 lb. (7.7 kg)22.0 lb. (10 kg)
Additional Features
Front Panel Direct Access ControlsYesYes
OS Compatibilityx86/x64 - Windows 7, Vista, XP, Server 2008, Server 2003; x86 - Win2000; x64 - Server 2008R2