REX 300, Ethernet Router

REX 300, WAN, PROFIBUS/MPI, serial port

REX 300, WAN, PROFIBUS/MPI, serial interface
REX 300, WAN, PROFIBUS/MPI, serial interface

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Replacement type REX 250 WAN.

They enable reliable and secure Internet remote maintenance of machines and systems. Thanks to the integrated Firewall, remote access is allowed only for authenticated users.
In combination with the myREX24 V2 portal, the complete scope of performance of industrial routers with the functions of remote maintenance, visualization, WEB2go, alarm and logging of the PLC data is possible.

An additional serial port makes it possible to also incorporate serial devices into your remote maintenance (Serial-over-IP).

  • Secure OpenVPN remote maintenance access via myREX24 V2 portal
  • Integrated firewall
  • Data server for data access to PLCs via RFC1006 (ISO on TCP), MPI, PROFIBUS, Modbus TCP/RTU, Allen Bradley, etc.
  • Directly connect S7-MPI/PROFIBUS devices
  • S7-MPI/PROFIBUS driver included
  • Remote maintenance of PROFIBUS (RS232/RS485) and Ethernet-compatible devices
  • Serial-over-IP

Download PDF datasheet
General information
Order number 700-873-WAN02
Article name REX 300 WAN, PROFIBUS/MPI, serial interface
Scope of delivery REX 300, Ethernet cable, Quick Start Guide
Dimensions (DxWxH) 125 x 40 x 128
Weight Approx. 300 g
WAN interface
Number 1
Type 10 Base-T/100 Base-T
Connection RJ45 socket
Transmission rate 10/100 Mbps
LAN interface
Number 1
Type 10 Base-T/100 Base-T
Connection RJ45 socket
Transmission rate 10/100 Mbps
USB interface
Protocol USB 2.0 host
Connection USB A socket
Serial Interface
Protocol RS232 or RS485
Transmission rate RJ45 socket
MPI/PROFIBUS interface
Transmission rate 9.6 kbps ... 12 Mbps
Connection Socket, SUB-D, 9-pin
Status indicator 6 LEDs, function status
4 LEDs, Ethernet status
Voltage supply 24 V DC, 10–30 V DC
Current draw Max. 500 mA with DC 24 V
Ambient conditions
Ambient temperature 0 °C ... +50 °C
Transport and storage temperature -20 °C … +60 °C
Relative air humidity 95 % r H without condensation
Pollution degree 2
Protection rating IP20
Certifications CE
RoHS Yes


 Name Version Size Tags
REX 300, Firmware (for devices with order numbers ending in 02) 3.7.0 12 MB History
REX Ethernet Router, shDIALUP 3.7 R1.0 34 MB
shCHECK 1.1.3 694 KB REX 100, REX 300, myREX24 V2 Free


 Name Version Size Tags
NETLink-S7-NET Driver, for Windows 7/8/10 32/64 Bit 11 MB History

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