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X-310 Web Enabled I/O - Ethernet relays, inputs, temp/humidity
5 Year Warranty

X-310 features 4 Digital Inputs, 4 Relays, 4 Temperature/Humidity sensor Inputs, and a built-in web-server that allows remote access from many devices along with infinite control and monitoring possibilities.


The X-310™ is a full-featured, web-enabled, Ethernet I/O module with four, independent 1-Amp relays, four digital inputs, support for up to four temperature or humidity sensors, and the ability to control up to 16 remote relays. It has non-volatile memory for logging (temperature, digital inputs, relays, etc.), a real-time clock with support for NTP (time server) synchronization and an advanced full-calendar scheduler which can be used to turn on/off relays at preset times. Its web-based user interface makes it easy to set-up and use.

Advanced Features

The X-310 has many advanced features such as the ability to initiate a connection to remote servers, BASIC programming, SNMP, email alerts, peer-to-peer communications, internal monitoring, logging, etc. Additionally, temperature and humidity data can be graphed directly from any HTML5 compatible web browser. These advance features make the X-310 an ideal solution for many applications including: security, remote control, street sign controllers, shift bell controllers, and much more.

Built-In Web Server

Like all of the ControlByWeb® products, the X-310™ has a built-in web server so its relays and inputs can be controlled and monitored using a web browser (or by using our CBW Mobile smartphone app).

Setup is simple; There is no app to download, no subscription to buy, no software required, and no programming necessary for setup or use.

The X-310™ is designed for accuracy and reliability, and is an innovative solution for a number of applications.


The X-310™ is a simple but powerful Ethernet I/O (or web I/O) device. The four relays and four inputs can be used for thousands of applications from event counters, to machine monitoring/control, to extending I/O from a PLC to another building, and much more.

The X-310's powerful and flexible design make imagination its only limit.

Use the X-310 to automatically turn on bells/horns for shift changes. Up to 16 remote bells can be controlled directly from the X-310

Shift change bells

Use the X-310 to automatically turn on bells/horns for shift changes. Up to 16 remote bells can be controlled directly from the X-310. If more bells are needed, daisy-chaining can be used.

Freezer temperature monitoring

Temperature monitoring and logging

Use the X-310's temperature and digital inputs to monitor and log temperature and door status at the same time.

ControlByWeb's X-310 unit controlling 16 alarms


Use the X-310 to lock/unlock doors at preset times. An electric lock controlled by the X-310 can be used in conjunction with a mechanical lock to allow access at certain times. Persons with keys can access a building during the day while electric lock is off but access is denied at night when the X-310 turns on the electric lock. In addition, the X-310 can send email alerts when the door is opened (anytime or just when the door is locked).


  • Four electro-mechanical relays (shared common) independently controlled
  • Four digital inputs (shared ground)
  • Two, scalable-counter inputs (Inputs 1 & 2)
  • One-wire bus for up to 4 temperature and/or humidity sensors
  • Control up to 16 remote relays
  • Monitor and log power supply (voltage)
  • Highly configurable - almost any combination of input/relay control possible
  • Real-Time Clock with NTP server synchronization
  • Automatic daylight savings and leap year adjustment
  • Full calendar scheduling with 100 programmable events
  • No software required
  • Customizable web-based control page
  • BASIC script support for advanced flexibility
  • Configurable logging
  • Graphing (logged data)
  • Send email alerts based on user-defined conditions
  • Supports encrypted email servers, such as gmail (X-310S models only)
  • Supports HTTPS (X-310S models only)
  • Static or DHCP IP address configuration
  • XML, Modbus/TCP, and SNMP interface options
  • Field updatable
  • Removable 14-Terminal connector for easy installation
  • Rugged DIN-Rail/wall-mountable enclosure
CE listed RoHS compliant Made in the USA


Server Room

Basic configuration for monitoring a server room with a moisture sensor, temperature sensor, and magnetic door switch.

X-310 Monitoring and controlling a server room


Basic configuration for remote starting and monitoring the status and temperature of an industrial generator.

X-310 monitoring and controlling a generator

Solar Energy Controller

Basic differential-temperature solar energy controller

X-310 Solar energy controller

X-310 Part Numbers (Differences highlighted in green)

X-310S-I Relays: 4 (1A 28VAC, 24VDC) Digital: 4 (4-26VDC)
Temp: 4 (-67°F to 257°F (-55°C to +125°C))
Supports HTTPS and SSL
(works with free email servers - Gmail, Yahoo, etc.)
9-28 VDC
X-310S-E Relays: 4 (1A 28VAC, 24VDC) Digital: 4 (4-26VDC)
Temp: 4 (-67°F to 257°F (-55°C to +125°C))
Supports HTTPS and SSL
(works with free email servers - Gmail, Yahoo, etc.)
POE Class 1 (0.44 to 3.84 Watt) and/or 9-28VDC

More Information:


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Warning: May contain chemicals, including Nickel (metallic), known to the State of California to cause cancer and reproductive harm. -



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