2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT

2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT

Marsoni

M251S

$139.00

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

2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT2 Ports Serial RS232 RS485 to Ethernet Converter USR N520 MQTT USR N520 is 2 serial Port RS232 RS485 Secure Serial Device Server which can connect RS 232 485 serial devices to the TCP IP network. It supports bi directional communication. Independent 2 serial 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 CTS RTS, XON XOFF Secure Client Operation

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I like this map holder for its versatility in holding different size maps. Once sealed, it was very effective at keeping moisture out and protecting the maps. I originally used this on a 13K mountain ascent. Worked great. The only thing that can be tricky at times is sealing the top. It's not as easy as sealing a typical zip-loc kitchen bag, takes some doing to get it to seal.

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Reviewed in the United States on May 26, 2025

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BearKnife

Louisville, US

★★★★★ 5

Best Map Case Ever!!!

Size: Regular - 12 x 16 Inches

Best Map case in the market! Field tested and keeps everything dry. The size is fantastic and you can run paracord through the rings. I would recommend this to anyone that uses a map. You definitely pay for what you get and that's high quality and functionality.

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Reviewed in the United States on August 13, 2025

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Kindle Customer

Port Orchard, US

★★★★★ 5

Just right for protecting river trip guides

Size: Regular - 12 x 16 Inches

Nice and durable - heavy duty. Getting ziplock to close is a pain though - lick or spit helps.

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Reviewed in the United States on December 19, 2024