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X-420 | Web-Enabled Instrumentation-Grade Data Acquisition

The X-420 features 4 Analog-to-Digital Inputs, 2 Digital I/O, up to 16 1-Wire Sensors (temp/humidity), Frequency Input, and a built-in web-server for remote access anywhere in the world!


Power Requirements

  • Voltage: 9-28 VDC
  • X-420-E: POE and/or 9-28 VDC
  • Max Current: 175mA Max (2-Digital I/O=On, no 1-wire sensors. See users manual for typical values at 25°C)

Output Mode

  • Logic output to external controllers 5V high through 49.9 Ohm resistor

Digital Inputs

  • Number of Inputs: 2 (configurable)
  • Type: Non-Isolated
  • Voltage Range: 0-5VDC
  • Current: Switchable 47K Pullup/Pulldown
  • Vin Hi (Min):
  • Vin LO (Max):
  • Debounce: 0 to 250mS (configurable)
  • Minimum Hold Time: 1ms
  • Number of Counter Inputs: 0-2 (configurable)
  • Max Count Rate: 200Hz Max
  • Input Functions: Monitor State, Control Digital I/O, Control Remote Relays, Scalable Counter, On Timer, Total On Timer, Frequency
  • Edge Trigger: Rising, Falling or Both

Frequency Input

  • Type: AC coupled, sine or square wave (works with millivolt magnetic wind speed sensors)
  • Max Input Voltage: ±12 VDC, 30Vpp AC
  • Hysteresis: 25mV
  • 0-20 kHz input frequency
  • Sine or Square Wave
  • 1 second average
  • Minimum input level:
Input FrequencyMin Vin
Vin @ 1 Hz50mVpp
Vin @ 10 Hz50mVpp
Vin @ 100 Hz60mVpp
Vin @ 1 kHz80mVpp
Vin @ 10 kHz700mVpp
Vin @ 20 kHz1.7Vpp min

Analog Inputs

  • Number of Inputs: 4
  • Resolution: 16-bit, SAR
  • Type: Single-ended, differential, 4-20mA (0-20mA), or a combination
  • Input Range: ±1.28V, ±2.56V, ±5.12V, ±10.24V, 4-20mA
  • Max Input Voltage (Vin): -12.5V < Vin < +12.5V
  • Input Impedance (Zin): > 500Meg Ohm
  • Channel Off Leakage: ±0.6nA (typ)
  • Input Common Mode Rejection: >100dB
  • Total Unadjusted Error: -9LSB (min), +9LSB (max)
  • Voltage Reference Drift: ±5 ppm/°C
  • Internal 4-20mA input shunt: 200-ohm, ±0.1%, 25ppm (uses ±5.12V range)
  • Logging Rate: 25 Hz

Temperature Sensors

  • Maximum Number of Sensors: 16
  • Type: Digital 1-Wire (Maxim 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, Control Digital I/O, Control Remote Relays, Log Temperature, Email Alerts
  • Humidity Type: Xytronix Model X-DTHS-P sensor
  • Humidity Range: 0-100% RH
  • Accuracy: ±2%
  • Max Cable Length: 600 feet (180m) maximum combined cable length

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, 1 Register, 2 Counters, 2 Digital I/O
  • Backup Duration: 2 week minimum


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


  • Power, Outputs, and Inputs: 14-Position, 3.81mm terminal spacing, Removable. For 16-28 AWG wire.
  • Network: 8-pin RJ-45

LED Indicators

  • Number of LEDs: 5
    • Power on
    • I/O (1-2)
    • Network linked
    • Network activity


  • Operating Temperature: -40°F to 150°F (-40°C to 65.5°C)
  • Size:
    • 1.41in (35.7mm) wide
    • 3.88in (98.5mm) tall
    • 3.1in (78mm) deep (not including connector)
  • Weight: 5 oz. (142 g)
  • Enclosure Material: Lexan 940 Polycarbonate Plastic
  • Enclosure Flame Rating: UL94 V0


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


  • Log File Size: 3,072K (up to 50,688 log entries depending on configuration)
  • Storage: Nonvolatile Flash
  • Buffer Architecture: Circular Buffer
  • Log data can be periodically read and stored on a computer

Advanced Features

  • Task Builder
  • BASIC interpreter
  • Remote services

Password Settings

  • Password Length: 6-18 Characters

Electromagnetic Compliance

  • IEC CISPR 22, CISPR 24
  • EU EN55024, EN55022
  • X-420-I: FCC 47CFR15 (Class B)
  • X-420-E: FCC 47CFR15 (Class A)

Product Safety Compliance

  • IEC 61010-1
CE listed RoHS compliant Made in the USA

More Information:


Where to Buy

Click "Buy Online" to view part numbers and pricing. X-420 is available in the USA and internationally, and can be purchased either from us or an Authorized Distributor.