Oki 521 User Manual

There’s nothing like it in its class.

The MICROLINE®520/521 is measurably

faster: it prints faster in any mode, and

feeds paper faster, too. And its printhead

is designed to last twice

as long as those of

competitive dot

matrix printers.

It also has some-

thing you won’t get

with conventional

9-pin printers: patented

OKI

SMART Paper Handling

TM

for hassle-

free switching between different paper

types. No more guesswork. No more

searching for the owner’s manual. No

more paper jams or uneven print quality.

Instead, the ML520/521 “reads and

learns,”automatically adjusting to the

paper you feed it. You get perfect output

on single sheets, card stock, multi-part

forms (up to six parts!) and labels.

What’s more, envelopes print out

flawlessly, with no jams or smears.

Individual pins in the

printhead also adjust to

the changes in paper, so

uneven printing, smears and

light spots are things of the past.

The printhead lasts longer, and the

printer uses less power and works

more efficiently.

The ML520/521 can also increase

your productivity: paper loading is

easier than ever, and its jam-free paper

path ensures uninterrupted throughput

during long print runs.

It can save you money in the long

run, as well: the zero tear function of

the optional Bottom Push Tractor lets

you print on “difficult” media without

wasting any forms.

You get handsome output and

exceptionally fast throughput every

time you print with the ML520/521.

This Reliable Printer
Does It All.

ML520/521

9-PIN IMPACT PRINTERS

This Reliable Printer
Does It All.

The superior­performance
9-pin printer
for multiple
paper-handling
applications.

When it comes to sheer print
speed, the ML520/521 turns out
a blazing 435 characters per
second (cps) in high speed draft
print mode, 325 cps in utility
mode, and 80 cps in near-letter
quality mode.

The ML520/521 has
8 resident bar code
fonts, including USPS ­certified PostNet,

TM

for envelopes
and labels. Plus,
to get the most out
of your software
without extra cost,
select from Epson,®IBM

®

and MICROLINE®emulations, all
of which are resident standard.

The ML520/521 is so reliable,
it comes with a 1-year warranty
on parts, labor and printhead.
In addition, the ML520/521
printhead has a life expectancy

of over 200 million characters,
so you know it can do the job
when you need it.

The ML520/521 has several
OKI-engineered accessories to
help you make the most of your

work day — including a

Bottom Feed Push Tractor

kit for thick forms; a Pull

Tractor for multi-part

forms, card stock
and labels; a serial
interface that lets you

connect easily to a

variety of systems

and increase the

productivity of your
work environment; a 4-million
character long-life ribbon; and a
Cut Sheet Feeder that gives you
more time for other work during
long, unsupervised print runs.

For reliability you can count

on, it’s the ML520/521.

Productivity Enhancing Features.

ML520/521

9-PIN IMPACT PRINTERS

Technology, Speed and Print Characteristics

Printhead: 9-Pin SIDM
Graphics Resolution: 288(H) x 144(V) DPI maximum
Print Speed and Character Matrix:

Mode NLQ Utility High Speed Draft

Speed (in cps) 80 325 435
Matrix (H x V) 17 x 13 9 x 7 7 x 7

Feed Rate: 5.0 ips

Emulation, Interface and Memory

Co-resident: IBM ProPrinter, Epson FX and OKI MICROLINE
Standard Interface: Centronics

®

Parallel

Optional Interface: RS-232C Serial
Standard Memory: 128K
Receive Buffer: 64K

Fonts/Characters

Code Pages: Standard ASCII; Epson Character Set I & II;

IBM Character Set I, II & All Characters; Foreign character
substitution; International character sets; Code page 850,
860, 863, 865; Bar code

NLQ: Courier, Gothic
Utility/HSD: Gothic
Bar Codes: Bar code 39, UPC E, EAN 8 & 13, Interleaved 2 of 5,

Code 128 (A, B, C), PostNet

TM

Paper Handling

Paper Input: Continuous forms, Cut sheet, Card stock,

Envelopes, Labels

Number of Copies: 6-part forms
Thickness: 0.14" (0.36mm) Rear Feed; 0.17" (0.44mm) Bottom Feed
Paper Feeding: Top, Rear, Bottom; Built-in Rear Push Tractor;

Friction Feed (Top)

Options: Top-mount Pull Tractor, Cut Sheet Feeder, Bottom Feed

Tractor Kit w/Metal tear bar, Roll Paper Stand (ML520 only)

Warranty and Reliability

Limited Warranty: One year parts and labor
MTBF: 6,000 hours (25% duty cycle/35% page density)
Printhead Life: 200,000,000 characters avg. in 10 cpi

utility mode @ normal, 25% duty, 35% page density

Environmental

Size (WxDxH): ML520 – 16.9" x 14.9" x 6.5"

(43cm x 37.8cm x 16.5cm); ML521 – 23" x 14.9" x 6.5"
(58.4cm x 37.8cm x 16.5cm)

Net Weight: ML520 – 17.6 lb. (8.0kg), ML521–23.1 lb. (10.5kg)
Acoustic Noise: 55 dBA (NLQ mode), 53 dBA (Quiet mode)

Ordering Information (Part Number)

Printer:

ML520 – 120V 62409001
ML520 – 220/240V 62409002
ML521 – 120V 62410001
ML521 – 220/240V 62410002

Accessories:

Bottom Feed Push Tractor (ML520) 70022901
Bottom Feed Push Tractor (ML521) 70023101
Pull Tractor Kit (ML520) 70023001
Pull Tractor Kit (ML521) 70023201
Cut Sheet Feeder (ML520) 70022501
Cut Sheet Feeder (ML521) 70022701
OkiLAN

®

10 Base-T Ethernet
External Print Server 70034401
Roll Paper Stand (ML520 only) 70023301
Super-speed 19.2K RS-232C Serial I/F 70012801

Ribbon:

Black cartridge 52107001

All specifications subject to change without notice.
© 1999 Okidata, Division of Oki America, Inc. OKI, Reg. T.M., M.D., M.R.,
Oki Electric Industry Co., Ltd. MICROLINE, OkiLAN, Reg. T.M., Oki Electric
Industry Co., Ltd. OKI

SMART Paper Handling, T.M., Oki Electric Industry Co., Ltd.

7-Day/24-Hour logo T.M., Oki America, Inc. Novell, NetWare, YES Tested and
Approved logo Reg. T.M., Novell, Inc. Centronics Reg. T.M. Centronics Data
Computer Corp. EPSON, Reg. T.M., Seiko Epson Corp. IBM, Reg. T.M.,
International Business Machines Corp. PostNet logo, T.M., USPS. Energy Star
Reg. T.M., U.S. EPA.
Printed in the USA. MS8812/0399

To Contact Okidata:

In USA: 2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: 800.OKIDATA (800.654.3282)
Fax: [phone]

In Canada: 2735 Matheson Blvd. East
Mississauga, Ontario L4W 4M8
Tel: [phone]
Fax: [phone]

Okidata División Internacional:

2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: [phone]
Fax: [phone]

Web Site: www.okidata.com

The rugged, tough OKI printhead

has twice the life of ordinary

impact printheads. And, with

OKI

SMART Paper Handling

TM

,

adjusts for any paper type

— automatically.