Modbus TCP to Serial RTU/ASCII Gateway

Marsoni

M251S

$150.00

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

Modbus TCP to Serial RTU/ASCII GatewayThe STM 501C, MODBUS gateway allows the legacy MODBUS RTU ASCII devices to operate on a MODBUS TCP network. It allows either MODBUS serial master or slave to communicate with MODBUS TCP's slave or master. Modbus TCP masters to Modbus RTU ASCII slaves: The STM 501C allows multiple MODBUS TCP masters to communicate with a MODBUS serial network. Since a MODBUS serial network can only handle one query at one time, queries from different masters are

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The product was in great shape when delivered. Even though the package was thin as it is the delivery was made with card and all was well with product. The instructions were good to use and change in my car. Also it showed the make of vehicle so I won’t be confused at all. Overall it was a great buy

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Reviewed in the United States on May 13, 2026

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Amazon Customer

Dallas, US

★★★★★ 5

Fits my Accord perfectly!

Size: 8.8" x 9.3" x 1.2"

Fits my 2008 Accord perfectly and feels just as sturdy as the OEM I used before, which cost nearly twice as much. Plus, it includes activated carbon, something the OEM didn’t have.

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Reviewed in the United States on May 15, 2026

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Susan F. Montville

Draper, US

★★★★★ 5

Easy to do it yourself and save!

Size: 8.8" x 9.3" x 1.2"

One place wanted $85 to replace this! Another wanted $50! I ordered this for $10, watched a YouTube video and did it myself! Super easy!

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Reviewed in the United States on May 10, 2026

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