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Remote Autonomous Zone Node (RAZN)

The RV-N55-7 RAZN is an automated peripheral to remotely monitor temperature sensors. It can work as an RTU or PLC also.
Kits with multiple RAZNs are available as Complete Turn Key Solutions.

The RV-N55-7 RAZN, and many other versions, can help cities and states prepare for extreme weather disasters with Autonomous operation.

This RV-N55-7 RAZN version has ultra-high performance voltage and current monitoring inputs, and many other GPIO interfaces.

The ultra-high resolution ADC in the RAZN is perfect for monitoring Thermocouple Sensors.
Thermocouple Sensors are common temperature sensors used in a many commercial and industrial applications.

Long Range Wireless options are: narrowband UHF or VHF channels, or license-free ISM band.
Internal wireless modems within one RAZN can mesh additional RAZNs together with one wireless link.

Raveon’s Remote Autonomous Zone Node (RAZN) has delta-sigma analog-to-digital converters (ADCs) that are ideal data converters for measuring, monitoring, and reporting thermocouple temperature sensors.
A programmable Gain Amplifier (PGA) is also within the RAZN, so gain can be from 0.125 to 128. Large gain for small signals, or low gain for large signals, is configurable. Most Thermocouples types have low output so this high gain PGA is great for this type of sensor.

RAZN   RV-N55-7   Product Features


We offer more features, great performance, and a reliable product at an exceptional price.

This complete solution can remotely control things that are even miles away.
The TI ADCs used to monitor voltage and currents are claimed “Best In The World” by TI.  RAZN uses them!

Application Note:  AN258(RAZN_IOs) (pdf)  explains the Myriad of IO features the RAZN devices have.

High Resolution Voltage Sensors

RAZN uses a TI 24 bit differential voltage sensor (the best in the world ADC) to measure voltage with 1M resolution. It can also measure current and 4-20mA current with over 1M resolution.
Use this High Resolution interface for the Sensors to Monitor   Detailed information about the sensor inputs is on the Terminal Information page..
The TI ADC chip in the RAZN also has noise filters and configurable gain, so the RAZN can be re-configured to reliably and accurately monitor sensors.
And the Autonomous features can monitor high resolution sensors and autonomously control things the way you want.
This AN236_Thermotypes (pdf)  application note explains how Thermocouple Sensors can work on a RAZN.

Status Recorder and Data Logging

The RAZN can be setup to record the status of inputs, outputs, communications, or whatever you want.
The large EEPROM inside the RAZN can store the data information you want, and no battery is required. Read it remotely via wireless link, or use the Ethernet interface.
Any register that monitors inputs, outputs, status, communications, timing, events, or whatever can be logged in to real later.

Automated System to Control base one Temperature

The RAZN can monitor the temperature of whatever you want, and Autonomously control other things based on that temperature.
Turn water( on or off) Turn pump( on or off) Turn a Fan( on or off) Turn valve( on or off) Turn relay( on or off) Turn

And it can send the temperature information to your computer, tablet, GUI, or IoT server. Or send a Text message with the temperature.
A long ways away, you can see the temperature because the RAZN has long-range RF capability, license free or narrow-bad RF.

In your remote area, you can see the remote temperature from 1 even hundreds RAZNs and see the temperature and then:
Automatically control things by the RAZN. Have it control what you want based on time and temperature.
Or look at the temperature display and press a RAZN button to remotely turn something ON/OFF.
Or have another RAZN beep a siren or flash a light base on the remote temperature.

Automated Peripheral

RAZN can remotely control and monitor lights, pumps, valves, alarms, doors, AC power, DC power, or almost whatever you would like to monitor or control.
Monitor and Control using MODBUS messages. Communicate using  wires, Ethernet, or long-range wireless links. All methods are available.
And you can configure the RAZN to Autonomously monitor sensors and do what every you want Autonomously to keep your system safe.

Use a pair of RAZNs to just do what you want them to do autonomously in a remote area over many miles using wireless links.

Robust, Reliable and Protected

The IO pins have great electrostatic discharge (ESD) and over-voltage protection. DC power input is reverse and over-voltage protected.
Internal smart CPU has watchdog timer, data stored in EEPROM, and battery powered clock.
Long-range communications uses wireless instead long copper that will fail.
All units are factory calibrated, RoHS Compliant, FCC certified wireless links.

High Performance Communication Interfaces

Ethernet, RS-485, USB, and many wireless RF options.  RAZN wireless links are super long-range communication. 1/2W to 5W UHF, VHF; 50mW-1W ISM LoRa.
Verify operation and quality of connection in the field from 1 to 50 miles. The RAZN can also communicate with Raveon’s data radio modems (RV-M6, RV-M8, RV-M7, RV-M9 …).
Use these RAZN terminal IO interface for the Sensors to Monitor.

Real Time Clock (RTC)

The battery backed up internal RTC is accurate and keeps track of all time, milliseconds, seconds, minutes, hours, days, weeks, months, and years.
It can be used to trigger events, and also time events and stop them when the time is over.
Timer events can turn things on or off based upon any time status you prefer.

A Myriad of Ways to Use This

We Make it Easy for your sensors to connect the World or Control anything in the World.
Point-to-Point: The two RAZNs can work together by themselves and control what you want in isolated areas.
You can use 2-200 of these RAZNs to do what you need to control in isolated areas.
We offer more features, good performance, and a reliable product at an exceptional price.

Master Control

Use a remote master controller PC, GUI, IoT server, or MODBUS master to communicate with the RAZN and control your things in isolated areas.
Some RAZNs have sensor inputs, so sensors placed in the root zone of the plants to remotely control irrigation.

Timers and Real Time Clocks

All RAZNs have a Timer Operations Actions Alerts (TOAA) feature to use its timers to do what you want and when you want to have it done.
Button inputs can trigger timers to turn remote things on or off for specific time periods.
Set Timer Operations Actions and Alerts (TOAA) to autonomously have actions take place.

  • Thresholds can trigger messages, text, or control local things based on: sensor inputs, timers, buttons, or any input feature,
    and automatically send SCADA messages to other RAZNs to remotely control them.

Temperature Measurement of Thermocouple Sensors

Thermocouples are temperature measurement sensors that output a voltage that changes over temperature. The thermocouple industry has created many versions thermocouple optimized for measuring different ways, and different thermocouples have different output voltages. RAZN’s ADS terminal inputs are modern ultra-high resolution that can use any thermocouple version.  All common thermocouple types can be used with RAZN. Here is the common thermocouple list and their characteristics, and the THC X T command can setup the thermocouple type code and the RAZN will compute temperature the way these parameters show.

List of Common Thermocouple Types

Type Code Lead Metal A (+) Lead Metal B (–) Temperature Range (°C) mV over Temperature Range Volt variations
at 0°C
E Chromel Constantan –270 to 1000 –9.385 to 76.373 58.70
K Chromel Alumel –270 to 1370 –6.458 to 54.886 39.48
J Iron Constantan –210 to 1200 –8.095 to 69.553 50.37
T Copper Constantan –200 to 400 –6.258 to 20.872 38.74
S Platinum and 10% Rhodium Platinum –50 to 1768 –0.236 to 18.693 10.19

With the RAZN, you can monitor the voltage or high-resolution digital ADC value to monitor the thermocouple. Setup input port in the RAZN to the actual common thermocouple type connected to it, and the RAZN will compute the temperature. Temperatures calculated are stored in registers that can be read. These temperature registers can be handled in many ways with this innovative RAZN.

  1. Read the temperature with SCADA commands over long-range wireless, Ethernet, or serial ports.
  2. Automatically send out the temperature the way you want.
  3. With the TOAA feature, you can autonomously control other output terminals based on the input temperatures, time, and other actions.

Raveon has many Complete Solutions to automatically Monitor and Control things.

The controller for your system can be setup in many different ways.  The easiest way is to buy is a preset pair of RAZNs we call the RV-N55-7-xxx.

The N55-7 version has two ADS (Differential Analog Inputs) and 8 FIO(Flexible Digital Inputs or Outputs) and one RD(Relay Driver).

There is also DC power output to be sued to power external sensors or devices.
Information about sensor inputs is on Terminal Information page.

RV-N55-7E Ethernet Interface

If you don’t need Long-range RF, you can use Ethernet or RS-485 connection to the RAZN to do everything also.

Send MODBUS messages over these connections to read your sensors.

Other RAZN version that will also work with your system.

Use the RAZN Long-Range wireless links or Ethernet or RS485 to communicate with other RAZNs we have.
Many RAZNs are available with Switched Power, Button Inputs, GPIOs, and many SCADA IO pin options.


N55-3G has 8 SV(Switched Voltage) outputs and 8 BI(Button Inputs).
Communicate with it over long rage areas using wireless data connections in VHF, UHF or ISM bands.

RV-N55-3E  Switched Voltage controller with Ethernet

And if you’d like to use Ethernet or RS485 connections to control things, the N55-3E RAZN can do that with your system.

Buttons and status are show on the GUI tablet

N55-7 Terminal Port I/O Pin Information.


Terminal A  GPIO Terminals in Flexible IO modes (FIO)
Pins 4-11 are FIO. Setup as digital Inputs or Outputs the way you want.
VIO voltage output terminal pin 2 outputs digital power voltage.
GND pins are Ground to this RAZN product ground.

Terminal B  Analog Inputs, FIOs, and Relay Driver
Pins 4-11 are FIO. Setup as digital Inputs or Outputs the way you want.
AVSS and AVDDD are the ADC reference voltages. No need to utilize these.
IADC terminals 5&6 can output current to drive temperatures resistor sensors or whatever you need output current to.
The two ADS inputs 7&8 and 9&10 are two high-resolution differential analog inputs.
Terminal 12 is a Relay Driver (RD) output to drive a relay if you want. It is an Open-drain output to connect to ground.

AC DC Power Input.
A power supply is connected into the RAZN to power it. DC input must be somewhere between 7V to 30V DC input.

The RAZN has many interface options: Long-Ranage Wireless, Ethernet, RS485, and RS232

Information about all the sensor inputs on all RAZN terminals is on the Terminal Information page..

This is Made in America.

Raveon designed this in California, and all RAZN technology, and the RF radios in the RAZN, are made here in America.

List how How to Setup the RAZN to remotely control an an automated peripheral

RV-N55-7 with MODEM

RV-N55-7 Can be monitored and controlled by a Data Radio Modem (RF Modem).
Your Controller connects to a radio modem to communicate to a RAZN in a remote area.

The RV-M22 is license free ISM band radio modem that is perfect for remotely controlling things using.

RV-N55-7 & RV-N55-3C

Temperature sensors on the RV-N55-7 can be monitored by an RV-N55-3B RAZN with its 1-8 Switched Voltage (SV) outputs.

Sensors on the N55-7 can remotely trigger the SV outputs to turn Lights, Pumps, Sirens, Valves, or whatever On or Off as you want.

And different outputs can trigger at different temperature thresholds. So different light can flash and different temperature issues.
Or different devices can be turned on based on different temperature thresholds.

RV-N55-7 monitors temperature sensors in size, time, and how periodic, and it can remotely control and signal other things like the N55-3 SV outputs.

Outputs in remote areas or local areas can be controlled as you want my the Autonomous features of the RAZN.
The long-range wireless communication feature option of the RAZN can send and control over many miles to many different things.

And you can beep a siren(or light) in a remote area based on a remote temperature!

RV-N55-7 & RV-N55-3C and GUI

The RV-N55-7 can be wirelessly connected to a PC, tablet, or server to monitor temperature and control remote terminal ports.

The RV-N55-3 has an Ethernet interface on it to connect to your controller.
So it can connect to your network. The RV-N55-3 can work with SCADA software that use MODBUS messages.

The Switched Voltage Outputs (SV)  on the N55-3 can also be used to remotely turn on/off devices base on remote temperature measured in the RV-N55-7.

A graphical User Interface (GUI) can be connected to the N55-3 or a Data radio modem to see the Temperature Sensors connected to the N55-7.

The GUI software on the tablet of PC connected via Ethernet to the N55-3 or a data radio modem.  It gets MODBUS messages for Sensor Status from the N55-7.

And the Master computer with the GUI can also monitor the sensors on the N55-7 and control the voltage on the N55-3 based on the sensors levels.

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