OKI Microline 520 Elite Marrow Carriage and 521 Wide Carriage 9-Pin
Dot Matrix Printers
9-Pin dot matrix printer aimed at dedicated forms printing. Ideal for
wholesale, retail and service environments where a verifiable paper
record is wanted and for labels and listings. Maximum speed 433 cps.
* Choice of 80 column ML520 (A4) or 136 column width ML521 at
10cpi
* High durability 9 pin head with a 200 million character life
* "Intelligent Print Head" automatically adjusts printhead gap
and print energy.
* Print speed to 433cps at 10 cpi and 12 cpi
* Barcode support.
* Centronics Parallel interface as standard
* RS232 Serial version available
* 4 million character ribbon life
* Up to 5 part forms, 1 original and 4 copies
The Elite models are upgrades to a a design dating back to 1992. OKI
rather discouragingly quote MTBF figures of a few thousand hours for
these printers but some of the original machines are still in use. OKI
engineers have been very innovative in their designs, but rather
conservative in their MTBF figures.
The 500 series advance over the "300" series is use of "intelligent
head" technology automatically adjusting head-gap and print force.
The ML3320 and 3321 are very similar and have barcode support but the
ML520 beats them at 10 cpi utility print.
The ML5520 is a newer design with an almost identical basic
specification but higher print speeds and a network option.
Control:
Touch-Buttons and lights along front
of the printer.
Duty Cycle:
Base model MTBF 6,000 hours
Ribbon life: 4 million characters in utility mode at 10cpi (re-inking
cartridge)
Printhead life: 200 million characters
Print Speed:
Characters per second at 12 dpi.
High speed draft (12cpi & 10cpi) - 433cps
Utility (12cpi & 10cpi) - 325cps
Near letter quality (12cpi & 10cpi) - 81cps
Fastest print speed (10cpi) - 433cps
Print
Resolution:
Up to 240 x 216 dpi
Carriage Widths: at (10cpi) 80 columns and 136 columns.
In compressed mode 160 columns and 272 columns
Character Pitch: 10/12/15/17.1 /20 pitch & proportional
Typeface & Font: NLQ-Courier, NLQ-Gothic, OCR-B, High Speed Draft,
Utility + Barcodes
Typestyles: Emphasised, Enhanced, Double Width, Double Height, Italics,
Bold, Superscript, Subscript, Underline, Overscore
Paper
Handling:
2 Versions ML520 with narrow cartridge 76—254mm. ML521 with wide
carriage 76—406mm.
Standard Paper Handling: Paper parking, Zero tear-off, Autoload single
sheet, Rear Push tractor.
Paper parts: 5 part forms, 1 original and 4 copies
Continuous paper 76—254mm
76—406mm
Continuous envelopes 165 x 91mm 239 x 102mm
First printable line (from top of page) 8.9mm
Optional Paper Handling: Pull tractors, Single/dual bin cut- sheet
feeder, Roll Paper Stand (ML520 Elite only). Bottom tractors with stand
and zero tear-off.
Tray 1:
Tray 2:
Tray 3:
Face Down:
Face Up:
Duplex:
Processor:
Memory:
64kb
Interface:
Standard Interfaces: Centronics Parallel
Optional Interfaces: Serial RS 232C/RS 422/Current Loop
Network:
Network
Protocols:
Print Languages:
Emulations: Epson FX, IBM ProPrinter/Graphics, Oki MicroLine
System
Compatability:
Power:
230V AC Frequency 50/60Hz.
Power
Consumption:
Dimensions:
ML 520 Elite Narrow Version 165 x 431 x 380 mm
ML 521 Elite Wide Version 165 x 585 x 380 mm
Weight:
ML 520 Elite Narrow Version 8kg
ML 521 Elite Wide Version 10.1kg
Acoustic
Noise:
57dB(A)/52dB(A) (quiet mode)
Consumables:
Ribbon (Life 4 million characters in utility mode at 10cpi (re-inking
cartridge))
Printhead (Life 200 million characters)
Drum
and Developer:
Image Transfer Belt:
Fuser:
Maintenance
Kit:
Whats In The Box:
Warranty:
Spares:
Access Cover - 2PA4094-7381G1
Back Up Roller Assy - 40917101
Cable Head Carriage - 2PU4007-1193P1
Case Gear Assy - 3PA4025-3406G1
Guide Roller Assy - 4PA4025-3719G1
Leaf Spring - 3PP4025-3320P1
LF Motor Gear - 3PB4055-2893P1
Operator Panel - 3PP4025-3670G2
Platen Assy - 3PA4025-3370G1
Platen Knob - 42269201
Pull Up Roller Assy - 3PA4025-3440G2
Ribbon Protector - 3PP4025-3430P1
Space Rack - 40904401
Support Protect Assy - 4PA4025-3382G1
Tractor Assy - 3PA4025-3330G1
Print Head - 4YA4023-2801G1
Logic Board - 4AY4042-1515G301
Power Supplies - 4YB4049-7031P2
Line Feed Motor - 3P4025-3357P2
Space Motor - 4YA4025-3250G1
Service:
Options:
Roll paper stand (ML520 elite only),
Pull tractor feed - narrow, wide
Single bin sheet feeder
Dual bin cut sheet feeder
Bottom tractors with stand and zero tear-off,
Serial RS 232C/RS 422/Current Loop Interface:
There is no specific Network print server. The OkiLAN 7120E is used
with the ML5520/21 and that might be an argument for the more recent
model.
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