Get a Live Demo

You need to see DPS gear in action. Get a live demo with our engineers.

White Paper Series

Check out our White Paper Series!

A complete library of helpful advice and survival guides for every aspect of system monitoring and control.

DPS is here to help.


Have a specific question? Ask our team of expert engineers and get a specific answer!

Learn the Easy Way

Sign up for the next DPS Factory Training!

DPS Factory Training

Whether you're new to our equipment or you've used it for years, DPS factory training is the best way to get more from your monitoring.

Reserve Your Seat Today

NetGuardian 224A

*Click an image to enlarge

The NetGuardian 224A is a light RTU with 24 discretes. This RTU is great for smaller sites that have a lot of discrete outputs.

Key Features

  • 2 general-purpose analogs
  • 2 general-purpose relay outputs
  • 4 D-Wire sensor ports
  • 24 discrete alarm inputs
  • Web interface: monitor without a master

The NetGuardian 224A monitors 24 discrete alarms and reports events to a Master Station, such as the T/Mon LNX, via LAN. It is equipped with 2 user-defined analog channels with 4 user defined thresholds per channel. The analogs terminate to convenient RJ45 connectors. There is 1 connector per analog channel and each input supplies +24Vdc to power your sensor if needed. Each analog may be configured for either -90 to 90 voltage range or 4-20 mA using field selectable shunt.

The NetGuardian 224A includes 24 discrete alarm inputs, 2 general-purpose relay outputs, and 2 general-purpose analogs, plus integrated battery voltage monitor. The unit also comes with 1 RS232 serial port for future use.

The NetGuardian 224A features DPS Telecom's user-friendly Web interface for convenient configuration and monitoring. Other features include real-time Clock (RTC), single -48VDC using RIA connector, a GigE Fiber port with SFP Sockets (ordering option) and 12 Port 10/100/1000 BaseT LAN switch (ordering option).

Other benefits of the 224A:

  • Plug 'n' play design – start monitoring in minutes
  • SNMPv3 compatible – send traps to your SNMP manager
  • 4 D-Wire sensor ports
  • Software reversible alarm inputs
  • Analog channels have integrated 24V power supply
  • Integrated temperature sensor
  • Expanded operating temperature range for extreme temperatures
  • 2-year hardware warranty
  • 30-Day no-risk money-back guarantee

Form Factor

  • Height: 1.75"
  • Width: 17"
  • Depth: 12.75"
  • Mounting:
  • Weight: 0 lbs

Core Features

  • Analog Alarms: 2
  • Control Relays: 2
  • D-Wire: 4-Plug
  • Discrete Alarms: 24
  • NIC: 10/100BaseT
  • Ping Targets: 32
  • Power Supply: -48Vdc
  • Rack Ears: Both
  • RoHS: 5/6
  • Serial Port: RS232
  • Web Browser Interface

Operating Conditions

  • Fuse: 3/4 Amp GMT
  • Humidity: 0-95% NC
  • Max. Current: 1 Amp, AC/DC
  • Max. Voltage: 60VDC / 120VAC
  • Temperature: -22 to 158F (-30 to 70C)

Optional Features

  • Power Supply: +12Vdc, +24Vdc, +48Vdc, -12Vdc, -24Vdc
  • Rack Ears: 19-inch, 23-inch
No additional software required.

Use the built-in web interface for configuration. Monitor via web interface, your SNMP manager, or a T/Mon master station.