Industrial RS485 4-ch High Current 30A Relay with RS485

Industrial RS485 4-ch High Current 30A Relay with RS485

Marsoni

M251S

$79.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Industrial RS485 4-ch High Current 30A Relay with RS485Industrial Modbus RTU 4 ch Relay Module with RS485 Interface, 30A High Current, Onboard LED Indicators, Multi Isolation Protection Circuits, Industrial Grade Rail Mount Case Features: This is an industrial 4 ch relay module controlled via RS485 bus, utilising Modbus RTU protocol. It features embedded protection circuits such as power isolation, ADI magnetic isolation, resettable fuse, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus

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I finally got around to cleaning up the cable disaster on my home office desk and these grommets were exactly what I needed. They fit perfectly into the 2-inch holes I drilled, and the plastic feels surprisingly sturdy, not like that cheap, brittle stuff that snaps the moment you try to pop the cover back on. The little brush-like opening is a nice touch because it keeps the cords from sliding back down when they aren't plugged in, and the black finish looks really clean against my wood tabletop. For a 4-pack, the price was a total steal, and it honestly makes the whole setup look way more professional than just having raw holes in the desk. If humans are looking for a quick and cheap way to hide cord clutter, these are a solid bet.

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Reviewed in the United States on February 10, 2026

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Amanda Schepeler

Belleville, US

★★★★★ 5

Great product

Size: 50mm/2inch, Color: Black, Number of Items: 4

Works as described. Love that it came with a hole drill bit!

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Reviewed in the United States on February 24, 2026

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MKR

Bozeman, US

★★★★★ 5

Desk grommet used on entertainment wall

Size: 50mm/2inch, Color: Black, Number of Items: 4, Size: 50mm/2inch, Color: Black, Number of Items: 4

I used this grommet for the entertainment center wall behind my TV and it looks good and works great. Came with all the tools I needed to cut the hole in the wall and install it.

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Reviewed in the United States on November 8, 2025

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Jamz-

Dallas, US

★★★★★ 4

Looks good in desk

Size: 50mm/2inch, Color: Black, Number of Items: 2

Made nice clean hole and inserts look and work well

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Reviewed in the United States on April 30, 2026

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Peter

Draper, US

★★★★★ 5

Fits and works just as expected

Size: 50mm/2inch, Color: Black, Number of Items: 4

I bought these to provide a snug fit for an EV charging cable running through my garage wall. They worked perfectly to keep out drafts and crawly things. Highly recommended.

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Reviewed in the United States on May 1, 2026