WebRelay-10™ is a robust, industrial relay board with Ethernet communications. It provides remote relay control through its ten large 15A relays.

The relays can be individually controlled using a standard web browser or by sending commands from a custom control application. It is self-contained with a built-in web server, and requires no external software, additional network modules, or computers.

WebRelay-10 is designed for industrial applications and can be DIN-Rail mounted inside a control cabinet. Tab connectors (1/4 inch) are used for power and relay contact connection.

WebRelay-10 Plus™

The full featured WebRelay-10 Plus has all the features found on WebRelay-10, plus much more. Additional features include an event scheduler, customizable email alerts, two discrete inputs, device logging, and remote temperature and/or humidity monitoring.



  • Ten independent 15A Relays – SPDT (Form C).
  • Built-in web server for browser-based setup and control.
  • No special software or device drivers required.
  • XML status and control page make communications with custom computer applications simple.
  • Can operate as a Modbus/TCP slave.
  • On/Off and Pulse modes.
  • DIN-Rail mountable.
  • LEDs indicate the current relay state.
  • 1/4-inch tab-connectors.
  • Power Supply: 9-28 VDC.
  • UL/CUL listed relays (E197852).

WebRelay-10 Plus Additional Features

  • Event scheduler with yearly calendar. Schedule up to 100 events.
  • Customizable email alerts.
  • Up to 8 temperature and/or humidity sensors can be added for environmental monitoring (one temperature sensor included).
  • Dry-contact sensors or switches can be connected for local control of relays or for monitoring external devices.
  • Inputs can be used as counters.
  • Logging; log relay changes, events, Modbus requests, high/low temperatures, input changes, network traffic, and more.
  • Real-time clock, can automatically adjust for daylight savings time, sync with NTP server.
  • System log provides detailed diagnostic information.
  • Simple scripts can be written in BASIC for advanced functionality.
  • Configure manually or with DHCP.

WebRelay-10 Part Numbers (Differences highlighted in green)

X-WR-10R12-I Relays: 10 (15A 277VAC, 30VDC) N/A 9-28VDC
X-WR-10R12-IP Relays: 10 (15A 277VAC, 30VDC) Digital: 2 (0-5VDC)

Temp: 8 (-67°F to 257°F (-55°C to +125°C))


Power Requirements

  • Voltage: 9-28VDC
  • Max Current: 477mA – 1391mA

Note: Current based upon voltage applied and device settings. See users manual for complete breakdown.

Relay Contacts

  • Number of Relays: 10
  • Max Voltage: 277VAC, 30VDC
  • Max Current: 15A
  • Contact Type: SPDT (Form 1C)
  • Load Type: General Purpose
  • Contact Resistance: < 30 milliohms initial
  • Contact Material: AgSnO2
  • Electrical Life: 100K cycles (Typical)
  • Mechanical Life: 10M cycles (Typical)
  • Environmental Rating: Over voltage Category II, Pollution Degree 2
  • Relay Modes: ON/OFF or Pulse
  • Pulse Timer Duration: 0.1 to 86,400 Seconds (1-day)
  • Relay Connections: 1/4″ Tab Terminals

Digital Inputs (WebRelay-10 Plus)

  • Number of Inputs: 2
  • Type: Non-Isolated
  • Voltage Range: 0-5VDC
  • Current: 47K Pullup
  • Minimum Hold Time: 20ms
  • Input Isolation: Non-Isolated
  • Input Functions: Counters, Email Alerts, SNMP Traps
  • Maximum Count: 32-bit
  • Max Count Rate: 25Hz
  • Edge Trigger: Rising, Falling or Both

Temperature Sensors (WebRelay-10 Plus)

  • Maximum Number of Sensors: 8
  • Type: 1-Wire Dallas Semiconductor DS18B20
  • Temperature Range: -67°F to 257°F (-55°C to +125°C)
  • Accuracy: ±0.5°C (from -10°C to +85°C)
  • Sensor Functions: Monitor Temperature, Log Temperature, Email Alerts, SNMP Traps
  • Humidity Type: Xytronix Model X-DTHS-WM wall mount sensor
  • Humidity Range: 0-100% RH
  • Accuracy: ±1.8%

Real-Time Clock:

  • Manual or NTP(Network Time Protocol) setup
  • NTP Sync Period: Once, Daily, Weekly, On Powerup
  • Auto Daylight Savings Adjustment
  • Battery (capacitor) Power Backup

Capacitor Power Backup

  • Backup Functions: Retain Real-Time Clock, External Variables, Relay State
  • Backup Duration: 3 days minimum


  • Type: 10/100 Base-T Ethernet Port
  • Setup: Static IP address assignment or DHCP, HTTP port selectable (WebRelay-10 Plus)

Connectors (WebRelay-10 Plus)

  • Accessory Connector: 5-Position, 3.81mm terminal spacing, Removable. For 16-28 AWG wire.
  • Network: 8-pin RJ-45

LED Indicators

  • Number of LEDs: 13
    • Power on
    • Relay coil energized 1-10
    • Network linked
    • Network activity


  • Size:
    • 9.125in (232mm) wide
    • 4.25in (126mm) tall
    • 2.425in (62mm) deep
  • Weight: 22 oz (626 grams)
  • Enclosure Material: PVC
  • Enclosure Flame Rating: UL94 V1
  • Operating Temperature: -40°F to 150°F (-40°C to 65.5°C)


  • HTTP, XML, Modbus TCP/IP, SNMP, SMTP, Remote Services, and Remote Monitoring


    • Log File Size: 512K max 17900 logs
    • Storage: Nonvolatile Flash
    • Buffer Architecture: Circular Buffer

Log data can be periodically read and stored on a computer

Password Settings

  • Password protection on setup page: Yes
  • Password protection on control page: Optional
  • Password Encoding: Base 64
  • Password Length: 10 Characters

Electromagnetic Compliance

  • IEC CISPR 22, CISPR 24
  • FCC 47CFR15 (Class B)
  • EN55024 ITE Immunity (2010)
  • EN55022 Emissions (2010)

Product Safety Compliance

  • UL 61010-1 (Electrical Equipment for Measurement, Control, and Laboratory Use)
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