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  6. Junction for achieving redundancy in EtherCAT networks.

Junction for achieving redundancy in EtherCAT networks.

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Moxa EJS-04 Series and EJS-08 Series

last updated:Nov 05, 2025

アイ・ビー・エス・ジャパン
アイ・ビー・エス・ジャパン
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Topology conversion support for star, line, ring, and tree types allows for more freedom and flexibility in EtherCAT wiring.

EtherCAT is a high-performance communication method, but in actual design and operation, the lack of "flexibility" can be a challenge. Do you face any of the following issues in your EtherCAT network configuration? ● You want to branch within the device, but EtherCAT can only be configured in a series… ● You have to redo all the wiring every time you change the layout… ● The inside of the control panel is a mess of wiring… ● Communication can become unstable due to noise interference… ● Poor compatibility between manufacturers… With Moxa's EtherCAT junction box, the 'EJS Series', you can achieve flexible branching and expansion with support for star, line, ring, and tree topology conversions, as well as redundancy for your EtherCAT network. Additionally, its IP30 metal housing provides high noise resistance, and its manufacturer-independent design ensures high compatibility, solving various issues you may have with EtherCAT!

    Routers, Switches, and Hubs
EJS

Junction for achieving redundancy in EtherCAT networks.

EJS 1.png
EJS 1.png 0a68aac3df6cdf98d019a5fdc5712afbce84ad4467c7db8a8422d_l.jpg b2c957923d09a863977e44e7e2e149c146de4ecf67c7db8b09234_l.jpg b0fe4e48d0cfd5e40d220d616965b401d24bbfee67c7dbbc34f4a_l.jpg 4112f20da88143a3bf14227dee35e3df361eefbd67c7dbbcadbe4_l.jpg IPROS2080725994197348024.png
  • EJS Series Special Page
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basic information

●Redundant power input support ●12/24/48 VDC input voltage ●Removable 4-pole terminal block ●High EMS level ●EtherCAT topology conversion: star, line, ring, tree ●Port delay: approximately 1μs per port ●Operating temperature range: -10℃ to 60℃ (standard model), -40℃ to 75℃ (wide temperature model) ●Housing: metal (metal housing), IP30 ●Compact size suitable for control panels 【EJS-04/EJS-04-T】 24.5 x 100 x 75 mm (W×H×D), 245g 【EJS-08/EJS-08-T】 43 x 100 x 75 mm (W×H×D), 340g

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Applications/Examples of results

All manufacturing industries that require EtherCAT networks, including semiconductor-related applications and lithium battery manufacturing applications.

Detailed information

  • 半導体製造装置.jpg

  • リチウムイオン電池製造.jpg

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Model number overview
ESJ-04 4-port industrial EtherCAT junction
ESJ-04-T 4-port industrial EtherCAT junction (wide temperature model)
ESJ-08 8-port industrial EtherCAT junction
ESJ-08-T 8-port industrial EtherCAT junction (wide temperature model)

catalog(4)

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Moxa EtherCAT Junction EJS Series

Moxa EtherCAT Junction EJS Series

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【Tech Note】Fault Tolerant - Building a Highly Resilient EtherCAT Network

【Tech Note】Fault Tolerant - Building a Highly Resilient EtherCAT Network

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Data Sheet: EJS-04 Series

Data Sheet: EJS-04 Series

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Data Sheet: EJS-08 Series

Data Sheet: EJS-08 Series

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Company information

アイ・ビー・エス・ジャパン

アイ・ビー・エス・ジャパン

IT/Telecommunications

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IBS Japan, with the motto "Supporting the IT transformation of industries that sustain our lives," is engaged in global business development in various industrial IT fields, focusing primarily on industrial networks. We carefully address the unique needs of each customer and provide comprehensive solutions that integrate the extensive knowledge and know-how we have cultivated in the industrial sector, thereby enhancing the efficiency and productivity of our customers' businesses. Together with our customers, we research high-level technologies and products recognized worldwide, and we propose solutions backed by solid technology and proven results every day.

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