Industrial-Router REX 250 with WAN WiFi
More than just remote maintenance! With REX industrial routers, you can access all components in your machine. Set up simple alerts and use your smartphone to access services within the system - such as websites or VNC-enabled components.
€1,088.00
Industrial-Router REX 250 with WAN WiFi
The REX 250 routers are designed for operation in conjunction with the myREX24 V2 portal: The complete parameterization and remote maintenance is carried out via the portal. In addition to remote maintenance, the REX 250 routers can also read data from the PLC, visualize 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 via an RS232 interface.
With the 4 digital inputs, alarms can be sent via SMS and email via the myREX24 V2 Portal. The 2 digital outputs can change the system states of the router, e.g. with a lamp on the control cabinet, or can be activated via the portal.
The USB host interface available on all devices enables the connection of USB device devices (eg programming interface of a drive) via the remote maintenance tunnel (USB-over-IP).
The REX 250 WiFi establishes the connection to the myREX 24 V2 portal via WLAN. Additional Ethernet devices can be connected to the router via the integrated 4-port switch. For data transmission, our industrial router uses an e
- Remote access to Ethernet-enabled devices such. PLC, HMI, IP camera
- WAN, WIFI, 3G or LTE variants available
- WAN interface for fail-over operation (3G, LTE and Wifi)
- Space saving and compact
- Integrated firewall
- Integrated 4-port LAN switch
- Digital inputs and outputs for connection establishment, status display and alarm
- Easy and fast configuration via the myREX24 VPN portal
- Read, visualize and log data from PLC
- Direct connection of S7-MPI / PROFIBUS devices
- Free S7-MPI / PROFIBUS driver
- Remote control of remote devices via Internet (RS232)
- Remotely maintain USB devices over the Internet
Industrial-Router REX 250 with WAN WiFi
General information
- Order number700-878-WIF02
- Article nameREX 250 WiFi, 4 x LAN (Switch)/1 x WAN/1 x WiFi
- Scope of deliveryREX 250 WiFi, Quick Start Guide
- Dimensions (DxWxH)35 x 100 x 73 mm
- WeightApprox. 250 g
- Status indicator4 LEDs, function status
- 8 LEDs, Ethernet status
- Voltage supply24 V DC, 18... 28 V DC
- Current drawmax. 100 mA at DC 24 V
I/O
- Digital inputs4x DIN EN 61131-2 Type 3
- Digital outputs2x max. 0.5 A for each output
WAN interface
- Number1
- Type10-Base-T/100-Base-T
- ConnectionRJ45 socket
- Transmission rate10/100 Mbps
LAN interface
- Number4
- Type10-Base-T/100-Base-T
- ConnectionRJ45 socket
- Transmission rate10/100 Mbps
USB interface
- Number1
- ProtocolUSB 2.0 Host
- ConnectionUSB-A-socket
Serial Interface
- TypeRS-232/422/485 (software switchable)
- Protocoltransparent access via virtual COM port
- Transmission rate300 bauds ... 115 k bauds
PROFIBUS interface
- Transmission rateup to 12 Mbps
- InterfaceRS-232/485 (software switchable)
- ConnectionSocket, SUB-D, 9-pin
VPN
- VPN protocolIPsec/PPTP/OpenVPN, 64 tunnels
- Encryption MethodBlowfish, AES, DES/3DES
- Encryption algorithmsMD5, SHA1
- AuthenticationPre-shared key, X.509
Network/security
- Firewall1:1 NAT, IP filter, port forwarding, stateful inspection
- IP routerNAT IP, TCP/IP routing, IP forwarding
- ServicesDHCP server, DHCP client, DNS server, NTP client, PPP server, DynDNS
- Time comparisonNTP server
Ambient conditions
- Ambient temperature-40 °C … +75 °C
- Transport and storage temperature-40 °C … +85 °C
- Relative air humidity0 – 95% non-condensing
- Pollution degree2
- Protection ratingIP20
- ApprovalsCE
Industrial-Router REX 250 with WAN WiFi
| Name | Version | Size | |
| Quick Start Guide, REX 200/250 | 9 | 2 MB | Download |
| Name | Version | Size | |
| shDIALUP (Windows 7; Windows 8; Windows 10; Windows 11) | 3.9.R0.12 | 69 MB | Download |
| Name | Version | Size | |
| REX 200/250 Firmware | 8.4.3 | 23,1 MB | Download |
| REX 200/250 Firmware Changelog | 8.4.3 | Download |
| Name | Version | Size | |
| STEP-Files REX100/200/250 | 6-2024 | 1,1 MB | Download |
| EPLAN Data Portal, Helmholz Produktmakros | Download |
How much data volume does a REX with GSM modem consume?
Assuming that a REX is connected to the myREX24 portal server 24/7, our tests have shown that up to 80 MB of data volume can be consumed per month (also depending on the ISP, 80 MB is the highest value found in our tests).
As soon as a user connects to the REX via VPN or data values are logged via the REX, the data volume will be higher.
After a device replacement USBoverIP does not work anymore
After transferring the configuration to the new device a synchronization with the portal has to be done again (In the portal click on Configuration-->Force Synchronization - see picture). After that USBoverIP works again and a connected device is recognized.
The reason:
When replacing a device the information "Firmware version" and "Hardware version" of the old device are deleted in the portal. But this information is needed for the new device to create the complete configuration (including USBoverIP). For this a new synchronization is necessary.
After a device exchange USBoverIP does not work any moreAfter a device exchange USBoverIP does not work any more
The connection to the myREX24 portal or the REX device is slow or unstable.
shDIALUP is affected by another software/application. This could be an antivirus program installed on your Internet PC or another VPN client software already installed. As far as possible, always use current browser versions and the latest version of shDIALUP Software.
The hardware of your dial-up computer and the Internet connection should generally provide good performance. A firewall and/or proxy server in your internal network structure may also affect the connection.
Which firewall settings are necessary to reach the myREX24 server?
The shDIALUP software and the REX routers establish an outbound TCP connection to the address https://v2.myrex24.net (5.39.123.21). To establish a secure connection to the myREX24 server, at least one of the following TCP ports (80, 1194 or 443) must be enabled for the VPN tunnel. If MAC address filtering is enabled in your firewall, it must be disabled or adjusted.
In the default setting, only the openVPN port 1194 is used. If this is blocked, the REX/shDIALUP configurations must be changed accordingly. There is no automatism, which polls all three ports cyclically and switches to a free one!
With the shDIALUP software (dial-in client) it is no longer possible to log in to the myREX24 V1 portal. The following message appears: The Authentification failed. Please make sure you have the right username and password.
For security reasons (patched in portal version 1.7.2) a login via server authentication method "1" is no longer possible. Please set the "Server Authentication Method" in shDIALUP to 2.
The Direct Line to Your Supporter.
Do you need help with your Helmholz product? The Technical Support Team offers you exactly the support you need.
Submit your support request online and we will connect you with an expert.
Industrial-Router REX 250 with WAN WiFi
The REX 250 routers are designed for operation in conjunction with the myREX24 V2 portal: The complete parameterization and remote maintenance is carried out via the portal. In addition to remote maintenance, the REX 250 routers can also read data from the PLC, visualize 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 via an RS232 interface.
With the 4 digital inputs, alarms can be sent via SMS and email via the myREX24 V2 Portal. The 2 digital outputs can change the system states of the router, e.g. with a lamp on the control cabinet, or can be activated via the portal.
The USB host interface available on all devices enables the connection of USB device devices (eg programming interface of a drive) via the remote maintenance tunnel (USB-over-IP).
The REX 250 WiFi establishes the connection to the myREX 24 V2 portal via WLAN. Additional Ethernet devices can be connected to the router via the integrated 4-port switch. For data transmission, our industrial router uses an e
- Remote access to Ethernet-enabled devices such. PLC, HMI, IP camera
- WAN, WIFI, 3G or LTE variants available
- WAN interface for fail-over operation (3G, LTE and Wifi)
- Space saving and compact
- Integrated firewall
- Integrated 4-port LAN switch
- Digital inputs and outputs for connection establishment, status display and alarm
- Easy and fast configuration via the myREX24 VPN portal
- Read, visualize and log data from PLC
- Direct connection of S7-MPI / PROFIBUS devices
- Free S7-MPI / PROFIBUS driver
- Remote control of remote devices via Internet (RS232)
- Remotely maintain USB devices over the Internet
Industrial-Router REX 250 with WAN WiFi
General information
- Order number700-878-WIF02
- Article nameREX 250 WiFi, 4 x LAN (Switch)/1 x WAN/1 x WiFi
- Scope of deliveryREX 250 WiFi, Quick Start Guide
- Dimensions (DxWxH)35 x 100 x 73 mm
- WeightApprox. 250 g
- Status indicator4 LEDs, function status
- 8 LEDs, Ethernet status
- Voltage supply24 V DC, 18... 28 V DC
- Current drawmax. 100 mA at DC 24 V
I/O
- Digital inputs4x DIN EN 61131-2 Type 3
- Digital outputs2x max. 0.5 A for each output
WAN interface
- Number1
- Type10-Base-T/100-Base-T
- ConnectionRJ45 socket
- Transmission rate10/100 Mbps
LAN interface
- Number4
- Type10-Base-T/100-Base-T
- ConnectionRJ45 socket
- Transmission rate10/100 Mbps
USB interface
- Number1
- ProtocolUSB 2.0 Host
- ConnectionUSB-A-socket
Serial Interface
- TypeRS-232/422/485 (software switchable)
- Protocoltransparent access via virtual COM port
- Transmission rate300 bauds ... 115 k bauds
PROFIBUS interface
- Transmission rateup to 12 Mbps
- InterfaceRS-232/485 (software switchable)
- ConnectionSocket, SUB-D, 9-pin
VPN
- VPN protocolIPsec/PPTP/OpenVPN, 64 tunnels
- Encryption MethodBlowfish, AES, DES/3DES
- Encryption algorithmsMD5, SHA1
- AuthenticationPre-shared key, X.509
Network/security
- Firewall1:1 NAT, IP filter, port forwarding, stateful inspection
- IP routerNAT IP, TCP/IP routing, IP forwarding
- ServicesDHCP server, DHCP client, DNS server, NTP client, PPP server, DynDNS
- Time comparisonNTP server
Ambient conditions
- Ambient temperature-40 °C … +75 °C
- Transport and storage temperature-40 °C … +85 °C
- Relative air humidity0 – 95% non-condensing
- Pollution degree2
- Protection ratingIP20
- ApprovalsCE
Industrial-Router REX 250 with WAN WiFi
| Name | Version | Size | |
| Quick Start Guide, REX 200/250 | 9 | 2 MB | Download |
| Name | Version | Size | |
| shDIALUP (Windows 7; Windows 8; Windows 10; Windows 11) | 3.9.R0.12 | 69 MB | Download |
| Name | Version | Size | |
| REX 200/250 Firmware | 8.4.3 | 23,1 MB | Download |
| REX 200/250 Firmware Changelog | 8.4.3 | Download |
| Name | Version | Size | |
| STEP-Files REX100/200/250 | 6-2024 | 1,1 MB | Download |
| EPLAN Data Portal, Helmholz Produktmakros | Download |
How much data volume does a REX with GSM modem consume?
Assuming that a REX is connected to the myREX24 portal server 24/7, our tests have shown that up to 80 MB of data volume can be consumed per month (also depending on the ISP, 80 MB is the highest value found in our tests).
As soon as a user connects to the REX via VPN or data values are logged via the REX, the data volume will be higher.
After a device replacement USBoverIP does not work anymore
After transferring the configuration to the new device a synchronization with the portal has to be done again (In the portal click on Configuration-->Force Synchronization - see picture). After that USBoverIP works again and a connected device is recognized.
The reason:
When replacing a device the information "Firmware version" and "Hardware version" of the old device are deleted in the portal. But this information is needed for the new device to create the complete configuration (including USBoverIP). For this a new synchronization is necessary.
After a device exchange USBoverIP does not work any moreAfter a device exchange USBoverIP does not work any more
The connection to the myREX24 portal or the REX device is slow or unstable.
shDIALUP is affected by another software/application. This could be an antivirus program installed on your Internet PC or another VPN client software already installed. As far as possible, always use current browser versions and the latest version of shDIALUP Software.
The hardware of your dial-up computer and the Internet connection should generally provide good performance. A firewall and/or proxy server in your internal network structure may also affect the connection.
Which firewall settings are necessary to reach the myREX24 server?
The shDIALUP software and the REX routers establish an outbound TCP connection to the address https://v2.myrex24.net (5.39.123.21). To establish a secure connection to the myREX24 server, at least one of the following TCP ports (80, 1194 or 443) must be enabled for the VPN tunnel. If MAC address filtering is enabled in your firewall, it must be disabled or adjusted.
In the default setting, only the openVPN port 1194 is used. If this is blocked, the REX/shDIALUP configurations must be changed accordingly. There is no automatism, which polls all three ports cyclically and switches to a free one!
With the shDIALUP software (dial-in client) it is no longer possible to log in to the myREX24 V1 portal. The following message appears: The Authentification failed. Please make sure you have the right username and password.
For security reasons (patched in portal version 1.7.2) a login via server authentication method "1" is no longer possible. Please set the "Server Authentication Method" in shDIALUP to 2.
The Direct Line to Your Supporter.
Do you need help with your Helmholz product? The Technical Support Team offers you exactly the support you need.
Submit your support request online and we will connect you with an expert.