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AR-M351U/M451U, AR-M355U/M455U  SPECIFICATIONS  3 - 5

*1: Since the function is of PS driver bundled with Macintosh,

specification may vary according to the OS.

Scanner (Scan to E-mail, Scan to Sharpdesk, Scan to FTP, Scan
to HDD *), FAX, Internet FAX *

*: The HDD (AR-P21 or AR-NC8) is required.

*1: When HDD is installed.

Function

Macintosh PPD file

(for Mac OS X ver10.2.8)

Configuration setting

Yes

Watermark

Yes

Form overlay

–

Print hold

Yes

Confidential print

Yes
(PIN selection)

Sample print

Yes

Print accounting

Yes

Quick sets

–

Auto configuration

– (OS9: Yes)

Job end notification

–

Tandem print

Yes
(The AR-P20/P21 or the AR-NC7/
NC8 is required. (option))

Carbon print

–

Multi-enlargement

–

XY zoom

–

Cover insert + pamphlet

–

Document filing

Yes (*1)
(Only when the AR-P21 or the AR-
NC8 is installed. (option))

PCL 5e 
compatibility

Target for PCL5e is to be compatible with HP 
LaserJet 4050.
Small margin difference, rendering difference 
by different font family, default and transfer 
function difference is not to be included in the 
compatibility.
All the PJL commands are not necessarily 
included in the compatibility.

PCL6 
compatibility

Target for PCL6 is to be compatible with HP 
LaserJet 4050.
Small margin difference, rendering difference 
by different font family, default and transfer 
function difference is not to be included in the 
compatibility.
All the PJL commands are not necessarily 
included in the compatibility.

PostScript 
Compatibility

PostScript is targeted to be compatible with 
Adobe PostScript as performed in HP LaserJet 
4050.
Small margin difference, rendering difference 
by different font family, default and transfer 
function difference is not to be included in the 
compatibility.

Mode

Scanner

Internet FAX

FAX

Supported 
server

SMTP server

FTP server

POP server

SMTP server

ESMTP server

–

Mode

Scanner

Internet 

FAX

FAX

Format

TIFF, PDF

TIFF-F, 

TIFF-FX

–

Compression 
method

Uncompressed,

G3 (1-dimension) *1,

G4 *3

*1 G3 (1-dimension) = MH

(Modified Huffman)

*3 G4 = MMR (Modified 

MR)

MH, MMR

MH, MR, 

MMR, 

JBIG

Mode

Scanner

Internet FAX

FAX

Half tone 
reproduction

Equivalent to 256 levels

Exposure 
adjustment

Auto + 5 steps

Quality 
selection

Half-tone ON/OFF (It's not effective for the 

following resolution with *.)

Resolution 
(Varies with 
the file type/
transmission 
method)

200 x 200dpi * 200 x 100dpi *

Normal (203.2 x 

97.8dpi) *

300 x 300dpi

200 x 200dpi

Small letter

(203.2 x 

195.6dpi)

400 x 400dpi

200 x 400dpi

Fine (203.2 x 

391dpi)

600 x 600dpi

400 x 400dpi

Extra fine (406.4 

x 391dpi)

–

600 x 600dpi

–

Mode

Scanner

Internet FAX

FAX

LDAP

Yes (Also can be stored in one-touch address.)

Specified 
destination

Specifying by one-touch or group, manual 

destination entry

One-touch 
keys (Max. 
number of keys 
to be stored.)

Max. 500 (999 *1) destinations

In this, FTP and Desktop are 100 (200 *1) 

destinations.

Group*

To be registered from one-touch and manual 

destination entry 300 (500 *1)

Program

Yes (8 programs)

Manual 
destination 
entry

Soft Keyboard

Input via the 

numeric

keys, # key and * 

key.

Chain dialing 
(Manual 
destination 
entry)

–

Up to 64-digit 

with pause

key

Resend

This is used to recall the last destination.

Speed dialing

This is used to recall address control number by 

using numeric keys.

AR-M351U/M451U, AR-M355U/M455U  SPECIFICATIONS  3 - 6

*1: When HDD is installed.

*

Manual destination entry: Entry other than One-touch, using
numeric keys or soft keyboard.

*

In the case of broadcast transmission including fax destina-
tion, the resolution level for fax mode is applied.

*

In the case of broadcast transmission with Internet FAX and
Scanner destinations, the resolution level of Internet FAX
mode is applied.

*

In the case of broadcast transmission, the compression format
set with the key operator programs is applied.

*1: When HDD is installed.

Mode

Scanner

Internet FAX

FAX

Specified 
destination

Specifying by one-touch or group, manual 

destination entry.

Max. number 
of Manual 
destination 
entry*

Total of 100 (5000 *1) destinations including 

group and relay broadcast.

Sequential 
broadcasting

Yes (E-mail only. It is not 

available for

FTP/Desktop.)

Yes

Simultaneous 
FAX 
transmission

–

Yes

Mode

Scanner

Internet 

FAX

FAX

Transmit 
function

Memory transmit

–

Data is sent 

by memory 

transmit 

when upper 

limit is set.

Yes

On-hook

–

Yes

Quick online 
transmit

–

Yes

Direct transmit

–

At on-hook 

only

Auto reduction
transmit

–

Yes: A3 

→

 B4,

A3 

→

 A4,

B4 

→

 A4

Rotation transmit

Yes

Scaling transmit

Yes (Scaling from regular size to regular 

size only.

Some functions does not allow rotation 

transmit)

Re-call 
mode

Error

–

Yes

Busy

–

–

Yes

No. of times/interval is set via key operator 

program.

Book original 
transmit

Yes

Long length 
original transmit

Yes

Yes

Yes

Max. 800mm

Specified pages 
per file

Yes

–

Maximum number 
of send data

Yes

–

Sender name

Max.500 (999 *1) destinations

Mode

Scanner

Internet 

FAX

FAX

Receive 
function

Auto receive

–

Yes

Manual receive

–

Yes

Memory receive

–

Yes

Reduction receive 
for standard size

–

Yes

Scaling receive for 
specified size

–

Rotation receive

–

Yes

Divided receive

–

Yes: To be defined by key 

operator program

Duplex receive

–

Yes: To be defined by key

operator program

2 in 1 receive

–

Address/Domain-
specified reception 
is enabled.

–

Yes 50 

address

–

Address/Domain-
specified reception 
is disabled.

–

Yes 50 

address

Only the

specified 

number

External phone 
connection

–

Yes

Answering phone 
connection

–

No

Transfer function 
at output trouble

–

Yes

Auto startup mode

–

Yes

Special 
function

Time setting

Yes

Transmit request

–

Yes

Remote transmit

–

Yes

Cover function

–

No

Print at sender

–

Yes

–

Page division

Yes

Page combination

No

Confidential 
(machine at the 
other end)

–

Yes (F code 

method)

Transmit 
broadcast 
direction

–

Yes (F code 

method)

Transmit message

–

Edge erase

Yes

Center erase

Yes

2 in 1

Yes

Card shot

Yes

Report/
List 
function

Transmit/receive 
record

Yes

Transmit/receive 
result

No

Yes

Address/phone 
directory list

Yes

Group list

Yes

ID/Sender's 
address list)

–

Sender list

Print 

administrator 

address.

No

Described in the key 

operation list

Confidential box 
check list

–

Yes 

(Integrated to 

the memory 

box list)

Transmit group list

–

Yes 

(Integrated to 

the memory 

box list)

Program list

Yes

Reserved transmit 
list

–

Memory box list

–

Yes (FAX 

mode only)

Memory clear 
notice list

–

(It's possible that this is output in case of 

errors.)

Others

PC-facsimile
transmission

–

PC-iFAX

PC-FAX

AR-M351U/M451U, AR-M355U/M455U  SPECIFICATIONS  3 - 7

∗

Figures in reduction/enlargement are represented by those at
the ratio to show slowest speed

Conditions: A4 or 8.5"x11" from front tray of PPC, with polygon

motor running.

*1: During OC mode

Mode

Scanner

Internet FAX

FAX

Transmission time

–

2 seconds (level: 

Super G3/JBIG)

6 seconds (G3 

ECM)

Modem speed

–

33.6kbps 

→

 

2.4kbps 

automatic fallback

Intercommunication

–

Super G3/G3

Communication line

–

General 

telephone line 

(PSTN), Private 

branch 

exchange(PBX), 

FAX line

ECM

–

Yes

Mode

Scanner

Internet FAX

FAX

Max. record 
width

293mm

Record size

–

A3-A5,

11" x 17"-

5.5" x 8.5"

A3-A5,

11" x 17"-

5.5" x 8.5"

Mode

Scanner

Internet FAX

FAX

Sub address

–

Yes

Passcode

–

Yes

AR-M351U/M355U

AR-M451U/M455U

Actual Reduction Enlargement Actual Reduction Enlargement

A4, 
8.5" x 11"

35

35

35

45

45

45

A4R, 
8.5" x 11"R

25

25

25

30

30

30

A5R, 
5.5" x 8.5"R,
Invoice-R

35

35

35

45

45

45

B5

35

35

35

45

45

45

B5R, 
Executive-R

25

25

25

30

30

30

B4, 
8.5" x 14" 

20

20

20

22

22

22

A3, 
11" x 17" 

17

17

17

20

20

20

Extra, 
Envelope

17

17

17

20

20

20

AR-M351U/M355U

AR-M451U/M455U

Document glass *1

Less than 4.9 
seconds

Less than 4.4 
seconds

DSPF

Less than 6.0 
seconds

Less than 5.3 
seconds

AR-M351U/M355U

AR-M451U/M455U

S

→

 S    *1

33 cpm (94%)

42 cpm (93%)

S

→

 D    *2

32 cpm (91%)

40 cpm (88%)

D

→

 D    *3

32 cpm (91%)

40 cpm (88%)

*1: S 

→

 S : A4 / 8.5" x 11" original 5 sheets

copy 5sets

*2: S 

→

 D : A4 / 8.5" x 11" original 10 sheets

copy 5sets

*3: D 

→

 D : A4 / 8.5" x 11" original 5 sheets (10 pages)  copy 5sets

Max. multiple number

999 pages

Copy ratio

AB series : 
25%, 50%, 70%, 81%, 86%, 100%, 115%, 122%, 
141%, 200%, 400%
Inch series : 
25%, 50%, 64%, 77%, 100%, 121%, 129%, 200%, 
400%

Zoom

25 - 400%
25 - 200% (Copy from DSPF)

Independent 
scaling

4

Exposure mode

Binary: Text(auto/manual), Text/photo, Photo
256 levels: Not provided

Manual steps

9 steps

Toner save mode Yes (Except for U.K.), Default: OFF

Function APS

Yes

AMS

Yes

XY zoom

Yes

Paper type select

Yes (By type setting)

Auto tray switching

Yes

Rotation copy

Yes

Electronic sort

Yes

Rotation sort

No

Reserved copy

Yes

Prior tray setting

No

Recall/register of program

Yes

Document filing

Yes
(The AR-P21 or the AR-
NC8 is required.)

Proof copy

No

Preheat function

Yes (To be set up by the 
key operator program)

Auto power shut-off 
function

Yes (To be set up by the 
key operator program)

Account control

Yes 500 accounts

Process control

Yes

Tandem copy

Yes (via network)
 (The AR-P20/P21 or the 
AR-NC7/NC8 is required.)

Tab copy

No

Book copy

Yes

Irregular original size input Yes

Irregular paper size input

Yes

AR-M351U/M451U, AR-M355U/M455U  SPECIFICATIONS  3 - 8

Yes: Standard Function

No: Not provided

Special 
function

Margin shift

Yes

Edge erase/Center erase

Yes

Dual page copying

Yes

Covers/Inserts

Yes

Transparency insert

Yes

Centering

No

Multi shot (Nin1)

Yes (2 in 1 / 4 in 1) 
(Centering: Yes)

Card shot

Yes

Pamphlet copy

Yes (Centering: Yes)

2-sided copy orientation 
change

Yes

Job build

Yes (max.10000 sheets)

Negative image

Yes

Shading

No

Mirror image

Yes

Multi-page enlargement

No

Repeat

No

Date stamp

Yes

Stamp

Yes

Character stamp

Yes

Page stamp

Yes

Scanner (Document glass) / DSPF standard
Operation panel integral type 
(common hardware for all the destinations)

Reading resolution (dpi)

Copy mode

Magnification

25 - 99

100

101 - 200

201 - 400

–

OC

600x600

600x600

600x600

600x600

–

OC
(High speed): 
Text/Auto

600x600

600x600

600x600

600x600

–

OC
(High speed): 
Others

600x600

600x300

600x600

600x600

–

DSPF/SPF 
(standard)

600x300

600x300

600x600

-

–

DSPF/SPF
(high quality)

600x600

600x600

600x600

-

–

Input and transmitting resolution (dpi)

FAX transmit mode and scanner/fax multicasting mode

Selection 
mode

Standard

Fine

Super fine

Ultra fine

600dpi 

sending

Input 
resolution: OC 

600 x391.2

600x391.2

600x391.2 600x391.2

–

Input 
resolution: 
DSPF

600x300

600x300

600x300

600x300

–

Transmitting 
resolution

203.2x97.8 203.2x195.6 203.2x391 406.4x391

–

Internet-FAX

Transmitting 
resolution

200x100

200x200

200x400

400x400

600x600

Scanner mode 

Selection 
mode

Standard

Fine

Super fine

Ultra fine

–

Input 
resolution: OC

600x391.2

600x391.2

600x391.2

600x600

–

Input 
resolution: 
DSPF

600x300

600x300

600x300

600x300

–

Transmitting 
resolution

200x200

300x300

400x400

600x600

–

Reading level

256 tones

Exposure lamp

Electrodeless xenon lamp

Output level

Binary

Reading area

297 x 431.8 (mm)
11.7" x 17"

Original 
alignment

Left edge / Rear corner alignment

Original size 
detection

Provided
(Standard size only)

Sizes to be 
detected

Automatic (one detection unit to be used with 
software modification by destination)

Inch-1

11" x 17", 8.5" x 14", 
8.5" x 11", 8.5" x 11"R, 
5.5" x 8.5" 

Inch-2

11" x 17", 8.5" x 13", 
8.5" x 11", 8.5" x 11"R, 
5.5" x 8.5" 

AB-1

A3, B4, A4, A4R, B5, B5R, A5

AB-2

A3, A4, A4R, A5, B5, B5R, 
216 x 330 mm

AB-3

8K, A4, A4R, A5, B4, 16K, 
16KR