REX300, Ethernet router

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 (PROFINET-compatible)
  • Serial-over-IP
GSM modem
Antenna terminalFME socket
SIM card typeStandard Mini-SIM, 1.8 V/3 V
GSM frequency bandsGSM/GPRS/EDGE: 850, 900, 1800, 1900
UMTS frequency bandsUMTS/HSPA: 800/850, 900, AWS 1700, 1900, 2100
Transmit powerClass 1, E2, 3, 4
Data transmission rateHSPA+ (upload: 5.76 Mbps | download: 21.0 Mbps)
WAN interface
Type10 Base-T/100 Base-T
ConnectionRJ45 socket
LAN interface
Type10 Base-T/100 Base-T
ConnectionRJ45 socket
USB interface
ProtocolUSB 2.0 host
ConnectionUSB A socket
Analog modem
Analog modemAnalog interface, max. 56 kbps (V.92)
Data transmission rateSet speed of 115.2 kbps
Modem portRJ-12 socket
Transmission standards / protocolsV.90, V.34+, V.34, V.32bis, V.32, V.22, V.22bis, V.21, V.23
Serial Interface
Protocoltransparent access via virtual COM port
Transmission rate300 Baud ... 115 kBaud
ConnectionRJ45 socket
MPI/PROFIBUS interface
Transmission rate9.6 kbps ... 12 Mbps
ConnectionSocket, SUB-D, 9-pin



REX 300 WAN+analog Modem, PROFIBUS/MPI, serial interface700-872-MDM02
REX 300, WAN+UMTS, PROFIBUS/MPI, serial interface700-872-UMT02