4 Ports RS485 Ethernet Modbus Gateway USR-N540-MQTT

4 Ports RS485 Ethernet Modbus Gateway USR-N540-MQTT

Marsoni

M251S

$199.00

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

4 Ports RS485 Ethernet Modbus Gateway USR-N540-MQTT4 Ports RS485 Ethernet Modbus Gateway USR N540 MQTT USR N540 is 4 serial Ports Secure Serial Device Server which can connect RS485 serial devices to the TCP IP network. It supports bi directional communication. Independent 4 RS485 ports. (3 in 1 Serial port RS232 RS485 RS422 Optional) 5 36V wide voltage input. Modbus RTU to Modbus TCP, Modbus Polling, Modbus to JSON Flow control XON XOFF Secure Client Operation Mode: TCPS, HTTPS. MQTTS SSL TLS

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I really like these I use one for rainbow peppercorns and one for black peppercorns. The third one I am using for some coarse pink salt I accidently purchased instead of fine, once the coarse salt is used up, I plan to use it for white peppercorns. They work great, look good and are the perfect size for everyday use.

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Reviewed in the United States on March 1, 2026

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Valerri H

Bozeman, US

★★★★★ 5

Great product

Love that theyre adjustable.

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Reviewed in the United States on April 19, 2026

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Michael Ilgenfritz

West Palm Beach, US

★★★★★ 3

Poor Quality

I wouldn't gift these... they seem to start having grinding issues after a few days of use. It feels like the grinding piece is binding / going to break when turning the top. Would not purchase again, and look for more durable item.

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Reviewed in the United States on March 20, 2023

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Connie Heath

Massapequa, US

★★★★★ 4

Lacking spices

They look just like pictures but it said they were pre- filled in the description and they arrived empty!

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Reviewed in the United States on March 31, 2026