The X-332™ is a robust, full-featured, web-enabled Ethernet I/O module. It has 16 independent relays, 16 optically-isolated digital inputs, 2 counter inputs, 4 analog inputs, support for up to four temperature and/or humidity sensors, and the ability to control relays remotely on other ControlByWeb devices. It also has many additional features such as a full calendar scheduler, a BASIC script interpreter, logging, and a real-time clock with NTP synchronization.

The X-332 has a built-in web server so its relays and inputs can be controlled and monitored using a standard web browser (or by using our CBW Mobile smartphone app).

Additionally, temperature and humidity data can be graphed directly from any HTML5 compatible web browser. Email alerts can be configured based on relay and/or input states, and temperature/humidity thresholds.

Some of its many advanced features include the ability to initiate a connection to remote servers, BASIC programming, SNMP, peer-to-peer communications, internal monitoring, etc.

Simply access and configure the X-332 by using its web-based user interface. There is no software required, no subscription to buy, and no programming necessary for setup or use.

The X-332™ is designed for accuracy and reliability, and is an innovative solution for a number of applications.



The X-332 is a simple but powerful Ethernet I/O (or web I/O) device that can be used for thousands of applications from event counters, to machine monitoring/control, building or equipment automation, to extending I/O from a PLC to another building and much more.


  • 16 Electro-mechanical 2A-relays, independently controlled
  • 16 Optically-Isolated digital inputs
  • Two, scalable-counter inputs (Inputs 17 & 18)
  • Four analog inputs
  • One-wire bus for up to 4 temperature and/or humidity sensors
  • Control up to 16 remote relays on other ControlByWeb devices
  • 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
  • Email alerts based on user-defined conditions
  • Built-in web server – No software required
  • Customizable web-based control page
  • BASIC script support for advanced flexibility
  • Configurable logging
  • Graphing (logged data)
  • Static or DHCP IP address configuration
  • XML, Modbus/TCP, and SNMP interface options
  • Field updatable
  • Removable terminal connector for easy installation
  • Rugged DIN-Rail/wall-mountable enclosure

X-332 Part Number

X-332-24I Relays: 16 (2A 30VDC, 30VAC) Digital: 16
Counters: 2
Analog: 4
Temp: 4


The X-332™ is a simple and powerful Ethernet I/O (or web I/O) device. With 16 relays, 16 digital inputs, 2 counter inputs, 4 analog inputs, and up to four temp/humidity sensors can be used for thousands of applications from machine monitoring and control, extending I/O from a PLC to separate locations, to counting input events, triggering relays based on analog and/or temperature and humidity thresholds.

The X-332™ has many more useful features such as a real-time clock, event scheduling, email notifications, etc. which make this a robust device to meet virtually any I/O application.

Below is a short summary of the different devices you can connect to the X-332™:

Power Requirements

  • Voltage: 9-28VDC
  • Max Current: 1.16A Max

Relay Contacts

  • Number of Relays: 16
  • Max Voltage: 30VDC, 30VAC
  • Max Current: 2A
  • Contact Type: SPST (Form 1A)
  • Load Type: General Purpose
  • Contact Resistance: < 100 milliohms initial
  • Contact Material: AgSnO2
  • Electrical Life: 100K operations (Min)
  • Mechanical Life: 5M cycles (Min)
  • Environmental Rating: Over voltage Category II, Pollution Degree 2
  • Relay Modes: ON/OFF or Pulsed
  • Pulse Timer Duration: 0.1 to 86,400 Seconds (1-day)

Digital Inputs

  • Number of Inputs: 16
  • Type: Optically-Isolated
  • Voltage Range: 3-26VDC
  • Current: 0.6mA @ 3V, 8.2mA @ 26V
  • Minimum Hold Time: 20ms
  • Input Isolation: 1500V
  • Input Functions: Monitor State, Control Relays, Control Remote Relays, High Timer

Counter Inputs

  • Number of Inputs: 2
  • Type: Non-Isolated
  • Voltage Range: 0-5VDC
  • Current: 47K Pullup
  • Minimum Hold Time: 20ms
  • Input Isolation: Non-Isolated
  • Input Functions: Monitor State, Control Relays, Control Remote Relays, Count, High Timer
  • Maximum Count: 32-bit
  • Max Count Rate: 25Hz Max
  • Edge Trigger: Rising, Falling or Both

Analog Inputs

  • Number of Inputs: 4
  • Type: Single-ended Channels
  • Input Range: 0-5VDC
  • Resolution: 12-bit
  • Reference: 5.00V, 0.04%, 3ppm/C, 50mA Max

Temperature Sensors

  • Maximum Number of Sensors: 4
  • Type:
  • Temperature Range: -67°F to 257°F (-55°C to +125°C)
  • Accuracy: ±0.5°C (from -10°C to +85°C)
  • Sensor Functions: Thermometer, Thermostat, Relay Control, Remote Relay Control, Email Alerts, SNMP Traps, Temperature Logging
  • 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, and Counters
  • Backup Duration: 3 days minimum


  • Type: 10/100 Base-T Ethernet Port
  • Setup: Static or DHCP IP address configuration


  • Power: 3-Position, 3.81mm terminal spacing, Removable. For 16-28 AWG wire.
  • Relays & Inputs: 8-Position, 3.81mm terminal spacing, Removable. For 16-28 AWG wire.
  • Network: 8-pin RJ-45

LED Indicators

  • Number of LEDs: 35
    • Power on
    • Relay coil energized 1-16
    • Digital inputs (1-16)
    • Network linked
    • Network activity


  • Operating Temperature: -40°F to 150°F (-40°C to 65.5°C)
  • Size:
    • 8.725in (221.6mm) wide
    • 1.815in (46.1mm) tall
    • 3.735in (94.9mm) deep (not including connector)
  • Weight: 31.3 oz (887.3 grams) with connectors
  • Material: Powder-Painted Steel


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


    • Log File Size: 512K (max 28,829 logs)
    • Storage: Nonvolatile Flash
    • Buffer Architecture: Circular Buffer

Log data can be periodically read and stored on a computer

Advanced Features

  • Data Graphing
  • BASIC interpreter
  • Remote services

Password Settings

  • Password protection on setup page: Yes
  • Password protection on control page: Optional
  • Password Encoding: Base 64
  • Password Length: 13 Characters

Electromagnetic Compliance

  • IEC CISPR 22, CISPR 24
  • FCC 47CFR15 (Class B)
  • EU EN55024, EN55022

Product Safety Compliance

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