Clever Designing for "Industrial" Ethernet Connectors

With the spread of AI and IoT technologies in recent years, the digitization of manufacturing sites and factories has progressed, resulting in an explosive increase in the number of connected communication devices.

 

"Ethernet", a communication standard used as a "general network", connects PCs and home appliances that we casually use in our offices and homes on a daily basis.

On the other hand, industrial equipment requires different conditions than general-purpose networks. For example, reliable and real-time transmission of information and high noise immunity are required. An “industrial network” that satisfies these requirements is called an industrial open field network compatible with Ethernet, and typical examples include CC-Link® and EtherCAT®.

 

Industrial equipment to which a huge number of communication devices are connected via such industrial networks is being replaced by "industrial Ethernet connectors" in order to reduce the board area and achieve robustness. In this article, we will compare the RJ-45 connector and LAN cable used in general-purpose Ethernet, and introduce the benefits of using Ethernet connectors developed for industrial use and clever design methods.

What is the difference between connectors and cables for general and industrial use?

General purpose Ethernet uses RJ-45 connectors and LAN cables. For industrial Ethernet, general-purpose connectors and cables can be used, but ix Industrial, a compact Ethernet connector for industrial equipment, is becoming mainstream. We will compare them here. *ix Industrial and the ix Industrial logo are trademarks or registered trademarks of Hirose Electric Co., Ltd.

ix Industrial and RJ-45 connectors
ix Industrial and RJ-45 connectors

 

RJ45 connector

ix Industrial Connector

Volume (mm3) *Reference value

3660

1100

lock structure

plastic claw

one-touch metal lock

Cable used

LAN cable

Issues when RJ45 connectors and LAN cables are used in industrial equipment

・If the claw breaks, the degree of adhesion will decrease, and the cable will come off or cause a connection failure.

・Noise that entered the cable cannot escape with only the signal line, and communication is easily affected. Therefore, it is difficult to install in a high-noise environment as a device.

・If there is no reference circuit, design man-hours such as operation verification including Ethernet PHY products will be required.

Advantages of using ix Industrial compatible connectors and cables

・The volume is reduced by 75% compared to the RJ45 connector, and the connector can be arranged at a pitch of 10 mm.

・One-touch metal lock structure improves mechanical strength

・Although a normal LAN cable is used, crosstalk is reduced by placing a GND terminal on the connector.

・As reference circuits including Ethernet PHY products are available, evaluation time can be greatly reduced.

 

As a connector and cable for industrial equipment, ix Industrial has the advantage of resolving the issues that have been faced up until now. From here, we will introduce how to proceed with the design smartly when introducing industrial Ethernet connectors.

What is the ix Industrial built-in GPHY evaluation board born from customer feedback?

We have been dealing with Marvell's Ethernet PHY for many years, and received such a request from a customer designing industrial Ethernet compatible equipment.

 

"Evaluation between Etherent PHY IC and trans-connector takes time"

"I want a proven reference circuit to shorten the evaluation time."

 

Therefore, we have developed an evaluation board that combines the ix Industrial connector with Marvell's Gigabit Ethernet PHY, which has a wide range of implementation results.

Benefits of using

・Can be evaluated by connecting to FPGA and CPU evaluation boards

・Provision of reference circuit information

・Immediate start with proven combinations

Marvell GE IX FMC Card
Marvell GE IX FMC Card

Marvell GE IX FMC Card Specifications

item

detail

I/F

・Ethernet ix Industrial connector x2 (10/100/1000BASE-T)

・FMC connector x1

power supply

・3.3V (via FMC connector)

・LDO (3.3V→1.8V)

・LDO (3.3V→1.0V)

PHYs

Marvell 88E1512

Others

RoHS compliant, UL compliant (board only)

External size

69mm x 121mm

Contents

・Body
·user manual

Please contact us if you would like to use it now.

We have introduced the details of the industrial Ethernet connector ix Industrial and the Marvell GE IX FMC Card.

If you are interested, please feel free to contact us.