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X-401 | Dual Relay and Input Module
5 Year Warranty

Powerful web-enabled dual relay and digital input module with scheduling and all of the advanced features from our 400-Series products.

Unlimited Possibilities for Industrial Internet of Things

The X-401 is a drop-in hardware replacement for our X-301 (WebRelay-Dual) with minor changes to software or configuration. It has two SPDT relays (form C) and two optically-isolated inputs, plus all of the advanced features from our 400 Series products.

Powerful scheduler with normal and override schedules, super flexible task builder, encrypted web pages, seamless peer-to-peer communications, and much more.

No software required, no programming necessary, and no subscription to buy.

Built-in I/O

2 SPDT (Form C) Relays

3A | 28VAC, 24VDC

Control: Low-voltage lights, motors, locks, solid-state relays (connected to larger loads), etc.

2 Digital Inputs

Optically-Isolated | 4-26VDC

Monitor on/off state or configure as digital counters or frequency measurement. They can be used to monitor switches, alarm sensors, level sensors, flow sensors, and much more.

Advanced Features


The X-401 offers the ability to log a variety of data points such as local and remote I/O, registers, tasks, and voltage. Log entries can be made at preset intervals, scheduled times, triggered by I/O changes or logic events.

Schedule a daily log file to be sent via email or uploaded via FTP server.


Graph the current log file and view the I/O's status over time.

X-401 Graphs I/O states over time, or by event

Other Advanced Features

The X-401 has more advanced features such as the ability to initiate a connection to remote servers, BASIC programming, admin/manager/user permissions, etc.


School or Shift Bells

Basic configuration for timed control of School or Shift Change Bell

Signs and Light Control

Basic configuration for timed control of signs and lights.

ControlByWeb Cloud

Our ControlByWeb Cloud makes accessing your data simple and secure without any of the drawbacks of cloud dependency. It provides access to our cellular devices and works with any 400 Series devices (X-400, X-405, X-410, etc.) and Wi-Fi modules (see compatible devices).

The cloud is included at no additional cost with a X-400C cellular data plan and provides remote access and enhances setup and commissioning.

With the cloud you can manage multiple locations and many devices with a single login, create parent-child account hierarchy that makes data organization easy, and log data in the cloud for easier access and easy download.

Here’s what the ControlByWeb Cloud does for you:

  • Easier Access
  • Single Password Authentication
  • Data Logging
  • Parent-Child Hierarchy
  • Logic Stays on the Device, Not the Cloud
  • Connect Unlimited Endpoints
  • Layered Security
  • Connect Incompatible Devices

Learn more about the ControlByWeb Cloud and how it can help you monitor and control your assets and processes much easier.

Applications - Industrial Internet of Things (IIoT)

The X-401 is a simple, but powerful Ethernet I/O module for large and small IIoT applications which require simple or advanced control logic. A select few of the many X-401's IIoT applications include:

X-600M Auto Reboot Controller

Automatic Reboot

Automatically reboot a device, such as an IP camera, server, computer, router, etc., by sending ping requests. If a preset number of ping requests fail, the X-401 will then attempt to restore the device to normal operation by rebooting.

X-600M Shift Bell Controller

Bell Controller

Set multiple bell schedules to control bells located locally and remotely. Set holiday schedules and automatically control which schedule is active.

X-401 controlling a door lock

Security Control & Monitoring

Remotely control and schedule magnetic locks, lights, gates, etc. Monitor door sensors, motion detectors, etc. Perfect drop-in solution for existing systems.


  • 2 Electro-mechanical relays
  • Two optically-isolated digital inputs
  • Peer-to-peer communications between 400 Series modules which provides seamless I/O sharing
  • User Permissions: Admin, Manager, User
  • Programmable tasks for scheduled events or conditional logic
  • Send email alerts based on user-defined conditions (supports encrypted email servers, such as Gmail)
  • Real-Time Clock with NTP server synchronization
  • Automatic daylight savings and leap year adjustment
  • Customizable web-based Control Page
  • BASIC script support for advanced flexibility
  • Configurable logging
  • Graphing (logged data)
  • HTTPS/TLS encrypted
  • Static or DHCP IP address configuration
  • Modbus, SNMP, Remote Service, IP Filtering
  • No software required
  • Removable 14-Terminal connector for easy installation
  • Rugged DIN-Rail/wall-mountable enclosure
CE listed RoHS compliant Made in the USA

X-401 Part Numbers (Differences highlighted in green)

X-401-I Relays: 2 (3A 28VAC, 24VDC) Digital: 2 (4-26VDC) 9-28 VDC
X-401-E Relays: 2 (3A 28VAC, 24VDC) Digital: 2 (4-26VDC) POE and/or 9-28 VDC

More Information:


Where to Buy

Click "Buy Online" to view part numbers and pricing. X-401 is available in the USA and internationally, and can be purchased either from us or an Authorized Distributor.

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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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