wiredinUSA November 2014

wiredInUSA - November 2014

INDEX

in connectors and cabling,” said Derrick

Stikeleather, OCC product design engineer.

The OCC Category 8 field installable plug

uses the same shielded housing used in

the company’s Category 6A shielded field

installable plug, a design that enables simple

terminations without specialized tools.

Military ribbons

Molex Incorporated’s Temp-Flex

FEP

flat-ribbon cable is thought to be the only FEP

solutiononthemarketthatmeetstheMIL-spec

requirement for M49055/11 & M49055/12

for harsh environment applications. Unlike

competitive PVC (polyvinyl chloride) and TPE

(thermoplastic elastomers) products, Molex

offers extruded FEP (fluorinated ethylene

propylene) dielectric insulation material for

a high performance ribbon cable that can

withstand exposure to chemicals, extreme

temperatures, abrasions and flexion.

“Signal failure has long been prevalent in

military, aerospaceand industrial equipment

applications due to the limited capability of

PVC and TPE cables, which can degrade

after repeat exposure to harsh conditions,”

said Jeet Sanyal, engineering manager,

Molex.

“Temp-Flex FEP cables were specifically

designed for the most severe environments,

yet they remain extremely flexible, making

them ideal for today’s smaller more rugged

applications including flight data recorder

boxes, missile systems and robotics found

in manufacturing plants across multiple

industries.”

Temp-Flex FEP flat-ribbon cables are durable

in temperatures ranging from -65ºC to

+200°C. They are resistant to acids, alcohols,

aldehydes, bases, esters, hydrocarbons

(aliphatic, aromatic, and halogenated),

ketones and oxidizing agents. An extruded

cable encapsulates each conductor with

insulation that will not delaminate, while the

low-loss dielectric constant (2.1) ensures the

optimum signal transmission with minimal

loss.

Optical assemblies

Molex Incorporated used October’s military

communications conference, MILCOM

2014, to highlight its hermetically sealed

multi-fiber circular MT optical assemblies.

For extreme sealing performance in a small

footprint, the new sealed multi-fiber circular

MT optical assemblies are said to provide

system reliability in extreme environments,

including severe weather conditions, high

altitudes and high atmospheric pressures.

These conditions can cause ordinary

surveillance and sensor equipment to fail,

and so create critical communications

problems.

Mark Matus, global product manager at

Molex, explained that hermetic sealing can

address this problem, but: “Hermetic sealing

for fiber optic connections has historically

been limited to large, single-channel

applications and until now was unavailable

in a high-density, reduced-footprint,

multi-channel option.

“The hermetic-sealed multi-fiber circular MT

optical assemblies, which are designed for

critical use applications where long-term

system reliability in harsh environments is

critical, ensure industry-leading gas-tight

sealing for superior performance.”

The new assemblies contain 12 to 24 fibers in

one connector, compared to competitive

products that utilize discrete-fiber (one fiber

per contact) connector designs.

The assemblies are appropriate for

applications

that

require

optimal

environmental and pressure sealing

capabilities, such as aerospace and

defense, mining, oil and gas exploration,

industrial process control, and medical. They

can operate in temperatures ranging from

-40° to 158°F (-40° to 70°C).

High performance copper cables

DVIGear has announced the availability

of High Resolution™ DisplayPort copper

cables, designed to transport DisplayPort

signals with bit rates up to 21.6Gbps over

cable lengths of up to 15m. The cables

support

uncompressed

DisplayPort

resolutions up to 4096x2160/60Hz.

Long distance transport of high-resolution

DisplayPort signals over copper cables

faces several challenges, such as insertion

loss, differential skew and jitter. Insertion

loss is caused by cable capacitance,

which acts as a low-pass filter, blocking

higher frequency signal components from

passing. Skew occurs when the differential

DisplayPort signalsgetdelayedandbecome

out of phase as they pass over a long cable.

Both factors contribute to increased digital

jitter, which degrades the performance of

the cable. This jitter becomes more severe

with higher resolutions, higher bit rates

and longer cable distances. Conventional

cables that support lower resolutions at

short distances are often unable to support

the data rates required by higher resolutions

at longer distances. The resulting video can

be disrupted by visual artifacts or may not

be visible at all.

To overcome these challenges, DVIGear's

HR™ series DisplayPort cables are

constructed using robust, heavy gauge

24AWG copper wires for durability.

The heavier wire gauge has increased

cross-sectional cable area, as well as

decreased capacitance and lower

differential skew, allowing high speed

signals to pass with minimal jitter. These

features enable cable lengths of up to 15m

with full compliance with DisplayPort 1.2

signal parameters.

MIL-spec requirement for M49055/11 & M49055/12 for harsh

environment applications

Hermetically sealed multi-fiber circular MT optical assemblies