industrial remote solutions

Remote access cloud solutions, firewall, Rugged design, wan, 3G Or WIFI, Wide temperature range, din-rail mounting

Helmholz produces a comprehensive range of automation components ranging from decentralised I/O systems, switches and repeaters, gateways and firewalls, to integrated remote maintenance solutions. Founded in 1988, the business has been at the forefront of developing user friendly and innovative automation components. Initially established as an engineering company for software and plant commissioning, two years later the first Siemens S5 products were launched. Today employing 85 people the company serves its worldwide customers through a network of sales offices and distributors. Assembly and inspection takes place at the company headquarters in Großenseebach, Germany. High standards of quality and performance, in accordance to ISO 9001:2015, have provided the foundation for Helmhoz success over the past 30 years.


Ethernet Routers

The REX 250 routers are designed for operation in conjunction with the myREX24 V2 portal. Parameterisation and remote maintenance is carried out via the portal. In addition to remote maintenance, the REX 250 routers can read data from the PLC, visualise and generate alarms. For remote maintenance and data transmission, the industrial router uses an encrypted VPN tunnel based on the secure OpenVPN protocol. The REX 250 routers also enable remote maintenance and data access to PLCs via an MPI / PROFIBUS and RS232 interfaces. The digital inputs can be configured to send alarms via SMS and email using the myREX24 V2 Portal. The onboard USB host interface enables the connection of USB devices (e.g. drives, HMIs) via the remote maintenance tunnel (USB-over-IP). The REX 250 LTE has an LTE modem, which connects to the myREX24 V2 portal. The WAN interface can form a fail-over network in conjunction with the 4G modem. The integrated 4-port switch can be used to connect the Ethernet nodes of the machine to the router on the available RJ45 ports

  • Integrated Firewall
  • Remote Maintenance Of USB devices Over Internet
  • Integrated 4x Port LAN Switch
  • WAN Interface For Fail-Over Operation (3G, LTE & WiFi)
  • Dual SIM (3G & LTE)

Linked Products
Ethernet Ports4x LAN
1x WAN
Inputs4x Digital Inputs (24VDC)
Outputs2x Digital Inputs (0.5A Max)
USBUSB2.0 Host
USB A Socket
Status LEDs8x LEDs - Function Status
10x LEDs - Ethernet Status
Power Supply18 - 30VDC
Protection RatingIP20
Operating Temperature-40oC to +60oC
CatalogueREX250-WAN DatasheetPDF 18.4MB
REX100-3G DatasheetPDF 3.2MB
REX100-LTE DatasheetPDF 18.2MB
Helmholz Remote Maintenance FlierPDF 5.6MB
Helmholz Product Summary BrochurePDF 3.2MB
ManualREX250-3G-LTE Quick Start GuidePDF 6.1MB
REX250-WAN-WIFI Quick Start GuidePDF 6.6MB
SoftwareSoftware, Drivers & Firmware
Dimensions3D CAD Files

Technical Information

Product technical details and product downloads

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