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

Easy Shipping

Quick Dispatch:

Your 2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your 2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT ships.

Need Help?
Questions about 2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for 2 Ports Serial RS232/RS485 to Ethernet Converter USR-N520-MQTT in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

I have two 70+lb, ball obsessed dogs (a field bred Golden Retriever, and an Old Time Scotch Collie), and these balls are living up to the abuse they're receiving. In the fall we always lose a ball or two in the yard due to getting lost in leaves or longer grass, so I always try and buy a multi pack at the start of the season, so went with these this year. I'm glad I did. Great price for a 6 pack, they fit the medium Chuck-It launcher (a little loosely, but they throw just fine), have great bounce, they FLOAT (which means I didn't lose any at the beach), and they're super durable to the dreaded "mouth squish." The squeaker dies pretty quick, like, within a day, but it isn't the kind that can fall out or choke your dog, so no worries there. The boys are happy, I'm happy, my wallet is happy - I've already ordered another pack.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on November 2, 2024

Verified Purchase

S. Berg

Port Orchard, US

★★★★★ 5

Good balls

Color: S6-glow

My dog is a chewer, and these have held up for close to a year actually a pretty good product

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 27, 2026

Verified Purchase

nanny america

Massapequa, US

★★★★★ 3

Disappointed

Color: S6-muti-color

These were great for about 20 minutes then they stopped squeaking...we have 2 left that I have saved but the other 4 do not squeak anymore...disappointed as my dog loves to squeak things...would not buy these again...My dog is only an 8lb dog too...but he can still play with the balls without the squeak...

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 26, 2026