WebRelay™ and WebRelay Wireless™ for Reliable Remote Relay Controlling

ControlByWeb - Ethernet I/O Experts

WebRelay™ and WebRelay Wireless™ for Reliable Remote Relay Controlling

ControlByWeb’s WebRelay provides reliable remote relay control and discrete signal monitoring over any IP network. And WebRelay Wireless has additionally “1-Wire” port for connecting up to four digital temperature or humidity sensors.

How to use WebRelay products?

ControlByWeb’s Ethernet I/O products can be used as a stand-alone device that can be integrated with an existing system.

They can also be used in peer-to-peer mode where multiple ControlByWeb products can communicate with each other, allowing you to control outputs based on another devices output or input status.

ControlByWeb’s stand-alone products can be used as slave modules to controllers such as the X-400™ / X-410™ / X-600™ Web-Enabled Programmable Logic Controller.

WebRelay™ | Single Relay and Input Module

ControlByWeb WebRelay Single Relay & Input Module

WebRelay™ provides reliable remote relay control and discrete signal monitoring over any IP network.

WebRelay can be used in countless applications, including pump and motor control, security lock systems, remote reboot, and lighting control. WebRelay’s powerful and flexible design make imagination its only limit. In addition to its built-in relay, WebRelay has an optically-isolated input that can be used to monitor the state of devices, control the relay, or control a remote relay somewhere else on the network. This feature is useful to extend the output of a PLC to another building, or to allow a switch or sensor to control a device at a distant location.

  • No programming required
  • Full control using a standard web browser or text-based XML messages
  • Can operate as a Modbus/TCP slave
  • Password protected
  • 12A relay contacts
  • ON/OFF or Pulsed relay modes
  • Optically-isolated input uses:
    • Monitoring
    • Relay control
    • Remote relay control (peer-to-peer)
  • Auto-Reboot controller mode for remote reboot of network devices
  • Selectable TCP ports
  • Removable terminal connectors included
  • DIN rail or wall-mount
  • Power supply options:
    • 9-28VDC
    • POE and/or 9-28VDC
  • Five-Year Warranty

WebRelay Wireless™ | Single Relay, Single Input, Up to 4 Sensors

The WebRelay Wireless™ is an easy to use Wi-Fi enabled relay, temperature monitor and status alerting device. The WebRelay Wireless has a built-in relay for controlling lights, motors and other relatively high current loads, a digital input which can be used to monitor and report the status of switch-closure sensors and a “1-Wire” port for connecting up to four digital temperature or other Xytronix 1-wire

The WebRelay Wireless works well as a standalone device that can be controlled using a web browser. It can be configured using simple menus and drop-down lists. It includes features such as logging, input state monitoring, and the ability to control other relays on other devices.

The WebRelay Wireless can be a selfcontained wireless access point that requires no additional servers or ControlByWeb devices. In this mode the WebRelay Wireless provides live, real-time temperatures or input status directly to a user through web browsers or the CBW Mobile app.

  • Built-in high current relay
  • Optically-isolated digital input
  • Up to 4 temperature sensors
  • Wireless Wi-Fi 802.11 b/g/n
  • Transmission range up to 250ft
  • Logging of the input, counter, temperature, humidity, relay state, and Vin
  • BASIC script support for advanced flexibility
  • Customizable web-based Control Page
  • Send email alerts (up to 8 email addresses) based on user-defined conditions
  • Supports encrypted email servers, such as Gmail
  • Static or DHCP IP address configuration
  • Real-Time clock with NTP server synchronization
  • Automatic daylight savings and leap year adjustment
  • No software required
  • XML, Modbus/TCP and Remote Services
  • Removable terminal connectors for easy installation
  • Rugged DIN-Rail/wall-mountable enclosure
  • Five-Year Warranty
ControlByWeb WebRealy Wireless Single Relay, Single Input, Up to 4 Temperature Sensors

If you need more relays (up to 16) in a single device and/or high-current (up to 30A) relays, please check product pages or give us a call:

ControlByWeb – Ethernet I/O Experts

ATOP 4G LTE Secure Embedded Edge Industrial Computers with Node-RED Support

ATOP - Industrial Networking and Computing

ATOP 4G LTE Secure Embedded Edge Industrial Computers with Node-RED Support

The SE5901B series has been designed by ATOP’s R&D machinery to provide robust serial signal communication which is both high-performance and cost effective at the same time. Applicable for both 3G and 4G networks, the series is designed to function as:

  • 3G/4G serial gateway
  • Modbus gateway
  • Smart Grid protocol gateway

SE5901B is available as a Standard SDK or Node-RED version. The Node-RED version, embedding a Node-RED micro-SD card, adds to the powerful hardware platform, the possibility add the ATOP-Customized Node-RED environment and an user-friendly Device Configuration UI.

Node-RED, an open source Building-Block programming environment, will allow you to build your IoT application from an user-friendly, hardware-tailored application design environment and dashboard.

Our NodeRED Micro SD Card provides:

  • Node-RED visual application development environment and dashboard, with automatic start on device boot-up, Node.JS based
  • ATOP-customized dedicated Web-UI for user friendly device set-up, allowing you to create VPN tunnels, set-up the network or the Cellular settings, date/ time, diagnostics and much mode without using Linux command line.
  • Different level of security to allow developers to access development environment and users to access dashboard only
  • Customized Node-RED APIs (blocks) that will allow you to fully control ATOP powerful hardware and control inputs, relays, Buzzer, diagnostics and much more
  • Integrated Modbus and MQTT stacks, for seamless communication with field devices and cloud
  • Integrated AWS, Azure, Google and IBM Bluemix Nodes.

SE5901B Key Features


Firewall is a necessity when it comes to either a 3G or a 4G network to prevent the looming risk of a port scan attack. The network becomes vulnerable to such kind of attacks due to the public IP addressing by the Internet Service Provider (ISP). Firewall in the SE5901B series can easily be enabled under the settings menu. By default the firewall denies all services or allows some specific services of SE.

  • Port Forwarding
    One of the features under the Firewall Setting is Port Forwarding which is used to redirect a communication request from one address and port number combination to another, while packets are traversing a network getaway.
  • DMZ
    Another feature under Firewall is the Demilitarized Zone (DMZ) which separates the Local Area Network (LAN) from un-trusted servers. The DMZ contains external facing servers and resources which can be accessed from the internet but the LAN remains unreachable. This adds a layer of security for the LAN by stopping hackers from directly accessing internal servers and data via the internet.

Ping Reboot

The Ping Reboot function ensures guaranteed quality of 3G and 4G communication by sending packets to specified destinations using periodic PING protocol. It will come into play once the SE framework detects no response from the destination.

Rugged, Versatile Performance

The series promises a robust industrial performance thanks to high electromagnetic protection, wide temperature resistance, programming and installation flexibility. The series can be applied in case of both 3G and 4G LTE networks and provides an extensive coverage across various frequency bands.

SMS Functionality

This newly added feature enables users to communicate with the device and receive vital alerts via SMS. Mobile numbers – which can be customized to create a restricted list can securely access the device using SMS and send commands.
Some of the SMS commands integrated in this system are for:

  • Rebooting the device
  • Connecting and disconnecting from VPN Protocols like IPsec, PPTP, OpenVPN
  • Activating or deactivating cellular data flow
  • Getting information on signal strength, IP address and GPS coordinates

In case of authentication failure, password and IP address change, device startup – alerts will be sent to the mobile via SMS.

Dynamic DNS

The device supports eight prominent Dynamic DNS servers including mydns and noip. In this system, the host server informs the DDNS server of its current IP which then returns it to the users based on their request. This enables the users to connect to the current IP.

Flexible Configuration

Flexible configuration options mean that the SE5901B series can be set up over the Ethernet via Telnet, Web Browser, Serial Console, or our Windows Utility.

Advanced Features

Some of the additional specs of SE5901B are – two digital inputs, outputs via a dedicated I/O version, geo-location via the GPS version and a “B” version which provides 15 seconds of power backup which allows it to relay back the information about the power failure to the host.

  • Ideal for IoT and IIoT applications; supports Node-RED and dashboard
  • Extensive 3G and LTE Band Support:
    – EU: 2100/1800/850/2600/900/800MHz (B1/B3/B5/B7/B8/B20)
    – US: 1900/AWS/850/700/700/1900MHz (B2/B4/B5/B13/B17/B25)
  • High-performance IPsec VPN throughput; data-rate up to 37.9Mbps
  • Wide temperature range for Industrial-grade performance
  • 1 x 10/100/1000Mbps Ethernet port
  • 1 x RS-232/485 port – baud rate up to 921.6 Kbps
  • 1 x USB2.0 high speed OTG port; 1 x Port USB Power-only port
  • 2 x Digital Inputs; 2 x Relays in the I/O version
  • Additional embedded power-bank for fault-relay capability in B Version

If you want to evaluate ATOP SE5901B product, we have in our stock both Node-RED and SDK versions available.

Link to product pages: ATOP Industrial Computing Solutions