USR-M511 Serial to Ethernet converter modbus RTU cellular gateway

FOB Reference Price:Get Latest Price
$40.00 - $59.60 / Unit | 1 Unit/Units (Min. Order)
Lead Time:
Quantity(Units) 1 - 100 101 - 500 >500
Est. Time(days) 2 3 Negotiable
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Quick Details
Model Number:
Brand Name:
Place of Origin:
Shandong, China
Working Current:
Serial Port:
Network Protocol:
DNS, Modbus, Customize Webpage:
Lead time:
within 2 days
2 years
Supply Ability
Supply Ability:
5000 Unit/Units per Week
Packaging & Delivery
Packaging Details
1.carton packing
2.Standard packing
Lead Time :
Quantity(Units) 1 - 100 101 - 500 >500
Est. Time(days) 2 3 To be negotiated
Video Description

USR-M511industrial iot gateway serial to ethernet converter,Modbus RTU/ASCII to Modbus TCP cellular gateway



USR-M511 is Modbus gateway that query Modbus RTU/ASCII slave and display data in internal webpage. It also supports reply the querying from Modbus TCP Master. USR-M511 provides a flexible method to control and monitor your Modbus RTU/ASCII device.




 Detailed Images





  • Support RS232/RS485 or RS422
  • Ethernet accessory
  • Internal webpage to control and monitor
  • Auto query Modbus RTU/ASCII Slave device
  • Modbus RTU/ASCII to Modbus TCP
  • 10/100Mbps ethernet interface, support Auto-MDI/MDIX
  • Baud rate support 600bps~230.4K bps
  • Support None, Odd, Even, Mark, Space
  • Support hardware Reload.
  • Support Static IP/DHCP
  • Support hardware Reload



Input Voltage DC 5~36 V
Working Current95mA@5V
Working Temperature-40~85℃
Storage Environment-45~105℃
Serial PortRS232/RS485/RS422
Network ProtocolIPV4, TCP/UDP
DNS, Modbus, Customize WebpageSupport
IP Access MethodStatic IP, DHCP
Power ProtectionAnti-reverse, ESD air 15KV Surge: 4KV (8 / 20us) Pulse group: 1.5KV 100KHZ
Network PortRJ45, 10 / 100Mbps, cross-connect adaptive
Serial Baud Rate600~230.4K(bps)
User ConfigurationWeb configuration, serial / network AT command
Modbus SlaveSupports up to 16 slave queries
Network CacheSend: 16Kbyte; receive: 16Kbyte
Serial CacheSend: 2Kbyte; receive: 2Kbyte;
Warranty2 years









Unmanned weighing date acquisition solution
Connect the Modbus gateway to control center ,and connect the various switches through the Modbus protocol to the Ethenet network.
Support the control camera capture,weighing instruments ,LED screen and other equipment on the unified management of date.


Intelligent traffic monitoring solution
Connect the Modbus gateway to control center ,and convert into an Ethenet network via Modbus protocol
Used to traffic date and processing.


Industrial automation solution
Connect the Modbus gateway to control center ,then the sensor ,controller,momory and other equipment will be connected to the Ethenet network
via the Modbus protocol
Used to realize the industrial automation process and the field control management.

Company Information


Jinan USR IoT Technology Limited

We focus on serial data networking communication in IoT and M2M field for more than 7 years. We supply networking devices such as serial ethernet converter, serial wifi converter, 3G 4G modem, 4G wireless router and embedded ethernet wifi module.We have professional R&D teams for hardware and software, phone APP and server. OEM & ODM service is acceptable.



  • Service: 2 years guarantee, and professional technical staff help.
  • Supply ability: We usually have 3000-5000 units in stock for urgent orders.
  • Capacity: 50K/week, can meet the demand of most enterprises application.
  • Lifetime: At least 5 years for each device, can still produce just if you need.
  • Cooperation: Welcome the cooperation with distributors all over the world.

Shipping ways

  • Southeast Asia, Mid East and Australia: Egypt, Israel, Pakistan, Turkey, India, Singapore, Thailand, New Zealand ect. We choose  DPEX or ARAMEX. It may take 7-15 days.
  • Russian Federation: we only send orders by EMS or CPAM. It  will take 20-45 days. 
  • South America: Brazil, Chile, Peru, Argentina, Columbia ect. We choose EMS or CPAM for shipping.It will take 20-45 days. If you really need DHL, please contact us.
  • North America and Most of Europe: We choose DHL, except cities that DHL can not reach. It will take 7-10 days.

Return/refund policy 

  • If you get a defective item and you do not like the item we send to you, Please contact us within 5 days after you receive your order.  item must be returned with its original packaging and accessories.Customer is responsible for shipping charges of returned item.We will refund the money to you when we get the returned item.  Or we can send you a new one according to your demand.
  • if item is lost in the transportation, we will fully refund to you.