DIAMOND
Fiber Optic Components

MIL-83526 DM4(Harsh environment)

CABLE ASSEMBLIES AND ADAPTERS

Diamond has developed the new rugged, MIL-83526 DM4 connector featuring the DM4 (Multipurpose Termini) for superior optical performance.
This connector is extremely well suited for harsh environments and otherdemanding applications. The MIL-83526 DM4 (Multipurpose Termini) connector incorporates four (4) termini utilizing Diamond's two-component ferrules, assembled with the company's Active Core Alignment (ACA) process
for unparalleled fiber core concentricity. This connector is also available
with electrical contacts for hybrid E/O applications.
The MIL-83526 DM4 connector is available for MM, SM (PC/APC), XB Lensed
Ferrule and small-core single mode fiber, polarization-maintaining (PM)fiber, and other specialty fiber types. Furthermore, Diamond‘s splice-on
termini can be field terminated with the Diamond ZEUS D50 HE fusion
splicer, allowing for in-service repairs and custom installation.

MIL-83526 DM4 connector and bulkhead

FEATURES AND BENEFITS Rugged construction for highly reliable optical connections
 IP class: IP68 rated
 Easy ferrule front-face access for cleaning & inspection
 Keyed, self aligning, connector housing aides in “blind mating”
applications
 Electrical pin size 20 AWG
 Easy termini insertion and removal for field termination and repair
 Lensed Ferrule 1.7mm Alberinos

DM4 (Multipurpose Termini)

CHARACTERISTICS OF DM4
 Well dimensioned hollow guide pins insure precise and repeatable pre-alignment
 Interacting, space saving pre-alignment hollow guide pins Robust alignment sleeve is protected in the hollow pre-alignment guidepins Alignment sleeves individually removable for easy cleaning Full protection of the optical elements from all external influences suchas rotating, bending and/or lateral stress Ability for mechanical keying

DIAMOND SA | Via dei Patrizi 5 | CH-6616 Losone - Switzerland
Tel. +41 58 307 45 45 | e-mail info@diamond-fo.com
the fiber meetingwww.diamond-fo.com

DM Termini (Optical - electrical termini)

Specifications subject to change
without notice
BDD 1951781 11_20

MIL-83526 DM4OPTICAL PERFORMANCES (obtained with the diamond proposed cables)
MEASUREMENT/TESTMULTIMODESINGLE MODE
PC/APCSTANDARDS

Insertion loss (std. version)

typ. 0.20 dB max. 0.50 dB

typ. 0.15 dB max. 0.45 dB

Insertion loss (fusion version)

typ. 0.20 dB max. 0.50 dB

typ. 0.25 dB max. 0.45 dB

IEC 61300-3-4 (ʎlʎ=1310 / 1550 nm)

Insertion loss (PM) version)-

typ. 0.25 dB max. 0.45 dB

IEC 61300-3-4 (ʎlʎ=1310 / 1550 nm)

min. 40 dB

min. 75 dB (APC) min. 50 (PC)

Return loss
Extintion Ratio-

IEC 61300-3-4 (ʎlʎ=1310 / 1550 nm)

IEC 61300-3-6 (ʎlʎ= 1550 nm)
Diamond validated cross polarizers
method (⋎lʎ= 1550 nm)

typ. 23 dB min. 20 dB

OPTICAL SPECIFICATIONS LENSED FERRULE (SM)MEASUREMENT / TESTMETHODVALUES SINGLE MODE

Insertion loss, random matedIEC 61300-3-34

IL type 0.6 dB max 1 dB

Return loss

IEC 61300-3-6

RL min. 35 dB

Resistance >200 MΩ

IEC 60512-3-1: 2002 (500V / 60 s)

ELECTRICAL TESTS
Insulation resistant test

PASS

Voltage Proof fest

IEC 60512-4-1: 2003 (2500V / 60 s / 50 Hz)

MECHANICAL AND ENVIRONMENTAL CONDITIONSChange of temperature-55 / + 85 °C

IEC 61300-2-22 (ʎlʎ=1310 / 1550 nm)

Low temperature-55 °C (96h)

MIL-STD-810G (ʎlʎ=1310 / 1550 nm)

High temperature+85 °C (96h)

MIL-STD-810G (ʎlʎ=1310 / 1550 nm)

95% r.h. / 10 cycles

MIL-STD-810G (ʎlʎ=1310 / 1550 nm)-55 / + 85 °C

MIL-STD-810G (ʎlʎ=1310 / 1550 nm)

110 mbar /15240 m

MIL-STD-810G (ʎlʎ=1310 / 1550 nm)

10/2000 Hz (3h)MIL-STD-202G (ʎlʎ=1310 / 1550 nm)

500 cycles

IEC 61300-2-2 (ʎlʎ=1310 / 1550 nm)+/-180° / 25 cycles

IEC 61300-2-5 (ʎlʎ=1310 / 1550 nm)

Humidity
Temperature shock
Low pressure / altitude
Vibration
Mating durability
Cable torsion

IEC 61300-2-44(ʎlʎ=1310/ 1550 nm)+/-90° / 25cycles FIELD INSALLATIONDIAMOND Zeus D50 HE FUSION SPLICER
FORANDREPAIR
Flexing of strain relief

600N on multi-fiber cable

Cable retention on connector side

1.2m / 26 drops

Shock
Tensile strength of coupling mechanism

200 N

IEC 61300-2-6 (ʎlʎ=1310 / 1550 nm)

2.5mm Crocodile
Fusion Alberino
HEMIL-STD-810G(ʎlʎ=1310 / 1550 nm)(Field spliceable)

IEC 61300-2-6 (ʎlʎ=1310 / 1550 nm)

Optical terminus
DIAMOND Zeus D50 HE FUSION SPLICER FOR FIELDINSALLATION AND REPAIR

2.5mm Crocodile
Fusion Alberino HE(Field spliceable)

DM insert

HE-2000™ plug connector
and bulkhead receptacle(Shown mated)

DM Termini

DM4MIL-83526 DM4 plug connector
and bulkhead receptacle(Shown mated)

Zeus 50 HE(Fusion splicer)

ORDER INFORMATION
Please contact your nearest local Diamond representative or fill in the contact form available on thewww.diamond-fo.com website.

MIL-83526 DM4CONNECTOR TYPES AND DIMENSIONSMIL-83526 DM4 (Connector)
Housing material:

Metal (Black) / Plastic (Orange)
DM4 Adapter

163

ø 28

53.6163163

53.6

4353.6
ø 2860.3

ø 30 +0.2-0ø 37

Metal (Black) / Nut (Orange)SW

4360.31828 +0.3+0.1

60.3

Panel Cutout

DM4 Adapter

ø 30 +0.2-0SW

34ø 30ca. 129

ø 24

ø 24

28 +0.3+0.1

ø 37

43

ø 37

1834

SW

431843

ø 30 +0.2-0

Housing material:ø 24

MIL-83526 DM4 (Bulkhead)

28 +0.3+0.1

ø 281834Max. wall Thickness 4mm
431836.5

Max. wall Thickness 4mm

34Max. wal

Panel Cutout

36.5

ø 30 +0.2-028 +0.3+0.1

ø 37

ø 37

DM4 Adapter

28 +0.3+0.1

18.5

SW34

Diamond Homologated OCC cables:
ITU-T G.652.A
ISO/IEC 11801 OM2 50/125
ISO/IEC 110801 OM1 62.5/125

NOTE Other configuration available upon request.

ø 30
ø 30 +0.2-0

ø 30

ø 30

Metal (Black) / Nut (Orange)SW

OCC SM Cable:
OCC MM Cable:
OCC MM Cable :28 +0.3+0.1

ø 37

MIL-83526 DM4 (Bulkhead) Short

18.5Max. wall43

ca. 129

18.5

Housing material:

43
18SW

34

ø 30 +0.2-0ca. 12936.5

43