4 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 Encryption
● Modbus RTU Master, Edge computing
● Hardware watchdog, automatically restarts when the device goes down.
| System Information | |
| Processor | ST Cortex-M7 |
| Basic Frequency | 400MHz |
| Flash | 128K+4M byte |
| Ethernet | |
| Port Number | 1 |
| Interface Standard | 8 pin RJ45 |
| Rate | 10/100 Mbps, MDI/MDIX, auto switch between cross and direct connection |
| Protection | 2KV electromagnetism isolation, shell insulation blocking |
| Network Protocol | IP,TCP,UDP,DHCP,DNS,https,ARP,ICMP,Web socket,httpsd client |
| Receive Buffer | Max 16k bytes buffer |
| Serial | |
| Port Number | 4 RS485 Ports, can work at the same time) |
| Interface Standard | RS-485: 2 wire (A+,B-) half-duplex |
| Data Bits | 7,8 |
| Stop Bit | 1,2 |
| Parity Bit | Even,Odd |
| Baud Rate | 600bps ~ 921600 bps |
| Flow Control | XON XOFF |
| Buffer | Send and receive 2k bytes respectively |
| Protection | RS-485: anti-static 2KV,lightning protection |
| RS-485 Pull-up and Pull-Down Resistor | 2.2 KΩ |
| Software | |
| Virtual Serial（USR-VCOM） | Windows 2000 or higher(32 bit/64 bit) |
| Configuration | Built-in webpage, computer set-up software, serial command |
| Basic Parameter | |
| Size | 222 x 122 x 29 mm (including shell and terminals) |
| Operating Temp. | -40 ~ 85°C (industry) |
| Storage Temp. | -40 ~ 85°C, 5 ~ 95% RH (no condensation) |
| Input Voltage | DC 9 ~ 36V |
| Working Current | 53mA @ 12V |
| Power | <1W |
Utilities
[Setup Software] H7 Version
Documents
[Datasheet] USR-N540-H7-4 Datasheet
[AT Command Manual]ARM Cortex-M7 Series AT command manual V1.0.0
Fast Shipping and Professional Packing
Through our long-term relationship in a long-standing partnership with UPS, FedEx, DHL and many other top global carriers we can provide a variety of shipping options. Our warehouse employees will pack every item to our exacting specifications. The goods you send us are checked thoroughly and secured properly prior to shipping. Everyday we deliver thousands of packages to customers across many countries. The fact that we're committed to becoming the biggest online retailer in the world is clear. Both Europe as well as the USA have warehouses and distribution centres.
Orders that contain more than one item are assigned processing times in accordance with the item.
We will inspect each and every one of the items ordered before shipping. Today, most orders will be shipped within 48 hours. The delivery time should be between 3-7 days.
Returns
The stock market is always changing. It's not entirely managed by us, since we have multiple organizations, such as the factory and our storage. Stock levels can fluctuate at any given time. Please understand it may happen that your order will be out of stock after the order is placed.
The policy is for 30 days. If you have passed 30 days in the past since you purchased, unfortunately we can't offer you a refund or exchange.
To be eligible for a refund, your item must be in good condition and in the same state that you received it. The item must be in the original packaging.
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