Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Notifications
Login / Register
Community
Community
Notifications
close
  • Forums
  • Knowledge Center
  • Events & Webinars
  • Ideas
  • Blogs
Help
Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Sustainability
Sustainability

Ask Me About Webinar: Data Center Assets - Modeling, Cooling, and CFD Simulation
Join our 30-minute expert session on July 10, 2025 (9:00 AM & 5:00 PM CET), to explore Digital Twins, cooling simulations, and IT infrastructure modeling. Learn how to boost resiliency and plan power capacity effectively. Register now to secure your spot!

Echelon guidelines for grounding a shielded segment of a LON trunk.

Building Automation Knowledge Base

Schneider Electric Building Automation Knowledge Base is a self-service resource to answer all your questions about EcoStruxure Building suite, Andover Continuum, Satchwell, TAC…

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
  • Home
  • Schneider Electric Community
  • Knowledge Center
  • Building Automation Knowledge Base
  • Echelon guidelines for grounding a shielded segment of a LON trunk.
Options
  • Bookmark
  • Subscribe
  • Email to a Friend
  • Printer Friendly Page
  • Report Inappropriate Content
Invite a Co-worker
Send a co-worker an invite to the portal.Just enter their email address and we'll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel
Invitation Sent
Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close

Related Forums

  • Intelligent Devices Forum

Previous Next
Contributors
  • Product_Support
    Product_Support
  • SESA113595
    SESA113595

Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Back to Building Automation Knowledge Base
Options
  • Bookmark
  • Subscribe
  • Email to a Friend
  • Printer Friendly Page
  • Report Inappropriate Content
0 Likes
1487 Views

Link copied. Please paste this link to share this article on your social media post.

Trying to translate this page to your language?
Select your language from the translate dropdown in the upper right. arrow
Translate to: English
  • (Français) French
  • (Deutsche) German
  • (Italiano) Italian
  • (Português) Portuguese
  • (Русский) Russian
  • (Español) Spanish

Echelon guidelines for grounding a shielded segment of a LON trunk.

Picard Product_Support
‎2018-09-07 11:24 PM

Issue

Shielded twisted pair cable may have been installed in an area of high EMI/RFI, and proper grounding of the shield wire is necessary to make the shield effective.

Environment

A segment of LON trunk with shielded, twisted-pair cable.

Cause

Proper grounding helps to avoid DC and 50/60 Hz ground paths from being formed through the shield.

Resolution

Follow the Guidelines as presented in the Echelon FT 3120/ FT 3150 Smart Transceiver Data Book, page 114, Figure 5.7 "Terminating and grounding Shielded Twisted Pair Cable."

Grounding Shielded Twisted Pair Cable

When using shielded twisted pair, terminate the twisted pair and ground the cable shield, as shown in Figure 5.7.

Figure 5.7 Terminating and Grounding Shielded Twisted Pair Cable

The twisted pair is terminated according to the guidelines listed in the previous sections. The cable shield should be grounded using a capacitor to tie the shield to earth ground, and a large-value resistor to bleed off any static charge on the shield.

Tie the shield to earth ground through a capacitor, instead of a direct connection, in order to avoid DC and 50/60 Hz ground paths from being formed through the shield. Typical values for Rb and Cc are as follows:

Cc = 0.1 µF, 10%, Metalized Polyester, ≥100V

Rb = 470kΩ, 1/4W, ±5%

The cable shield should be grounded at least once per segment, and preferably at each device.

Labels (1)
Labels:
  • TAC IA Series
Attachments
Tags (1)
  • Find more articles tagged with:
  • 5093
Was this article helpful? Yes No
No ratings

Link copied. Please paste this link to share this article on your social media post.

To The Top!

Forums

  • APC UPS Data Center Backup Solutions
  • EcoStruxure IT
  • EcoStruxure Geo SCADA Expert
  • Metering & Power Quality
  • Schneider Electric Wiser

Knowledge Center

Events & webinars

Ideas

Blogs

Get Started

  • Ask the Community
  • Community Guidelines
  • Community User Guide
  • How-To & Best Practice
  • Experts Leaderboard
  • Contact Support
Brand-Logo
Subscribing is a smart move!
You can subscribe to this board after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the board - and gain access to more than 10,000+ support articles along with insights from experts and peers.

Register today for FREE

Register Now

Already have an account? Login

Terms & Conditions Privacy Notice Change your Cookie Settings © 2025 Schneider Electric

This is a heading

With achievable small steps, users progress and continually feel satisfaction in task accomplishment.

Usetiful Onboarding Checklist remembers the progress of every user, allowing them to take bite-sized journeys and continue where they left.

of