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Terminals on SCADA products and the RAZN have many Input/Output capabilities.
This page describes all the types of terminals available on Raveon’s products with SCADA terminals and General Purpose IOs.

Input Output (IO) Terminal Block Descriptions

Each product version of the RAZN and Raveon’s GPIO interfaces on radio modems has a variety of different inputs and output terminal block function pins with a myriad of different features available.

Here is a description of the IO terminals available on various RAZN terminal blocks and some Tech Series data radio modems.

If you need some other terminal IO feature, contact Raveon and we will be glad to create new IO functions. If an IO pin has a Configuration variable, the letters is the name code code for the particular IO pin is how they are referred to and configured in commands.

All pins are heavily protected against noise and ESD and can be configured using commands in Command mode, or a program to program the RAZN.

The specifications listed here are typical specs for our products. Please look at the data sheet for the specific product you need accurate specifications for.

DI      Digital Input.

IOPIN:  A is the character to use to specify this type of GPIO

  • Max DC input Voltage: Vcc 3.3V std. 5V option.
  • “ON” DC input voltage Range (0.8 × Vcc) to Vcc
  • “OFF” DC input voltage Range 0V – (0.12 × Vcc)
  • Input Current:  ±2uA

DO      Digital Output.

IOPIN:  B is the character to use to specify this type of GPIO

  • Output “ON” voltage output: (0.9 × Vcc) to Vcc
  • Output “OFF” voltage output:  0V – 0.1V
  • Output impedance: 1000 ohm – 1200 ohm
  • Output current: 3mA max. The Res is 1K on normal DO.
  • CAP: 220pF      Res: 1K  Diodes for extra ESD protection.
  • VCC Voltage: Vcc 3.3V std. 5V option.

FIO     Flexible Digital Input / Output

IOPIN:  A(In) B(Out) is the character used to specify the IO mode

  • User configurable TTL digital IO pins configurable as In or Out.
  • Max DC input Voltage: Vcc
  • “ON” DC input voltage Range: (0.8 × Vcc) to Vcc
  • “OFF” DC input voltage Range: 0V – (0.12 × Vcc)
  • Input Current:  <2uA
  • CAP: 220pF      Res: 1K      Diodes for ESD protection.
  • Default IO mode from factory: A (digital Input).

SV   Switched Voltage Output    Ac or DC input voltage switched by this output

IOPIN:  D is the character to use to specify this type of GPIO

  • AC or DC diverted input on VP and VPG.   SV is switched voltage out, and the output device shares the power source ground connection VPG.
  • Max DC input:
  • Max AC input:
  • Input impedance on power input:
  • Switch impedances when on:
  • Switch impedances when off:

The RV-N55-3 RAZN has many SV options to control you pumps, valves, lights, or whatever, and it has button inputs to locally control also if needed.

BI   Button Input.

IOPIN:  S is the character to use to specify this type of GPIO

  • Input with pull-up resistor.  Button ON is when input is shorted to ground connection by a button.
  • Pull-up resistor R(PU):  2.4k
  • Input impedance:  2.4k
  • Max input voltage: 50V DC or AC
  • On Threshold:
  • Off Threshold:
  • Current draw to short input to ground.  1mA.

BM   Button Monitor.

IOPIN:  S is the character to use to specify this type of GPIO

  • Input with large pull-up resistor.
  • Button ON is when input is shorted to ground connection by a button.
  • Button OFF is when input open circuit, not connects, button OPEN.
  • Pull-up resistor R(PU):  2.4k or
  • Max input voltage: 0-3.3V DC
  • On Threshold:  >2.8V and Open source input.
  • Off Threshold:  <.5V Connect BM to GND
  • Current draw to short input to ground.  1mA.

OIDI    Optically Isolated Digital Input

IOPIN:  A is the character to use to specify this type of GPIO

  • Max DC input Voltage:  Vdd+.1
  • “ON” DC input voltage Range: (0.9 × Vdd) to Vdd
  • “OFF” DC input voltage Range: 0 to (0.2 × Vdd)
  • Input Current:  < 10uA
  • CAP: 220pF      Res: 1K      Diodes for ESD protection.

OIDO     Optically Isolated Digital Output

IOPIN:  B(Out) is the character used to specify the GPIO mode

  • Output “ON” voltage output:  Vdd.
  • Output “OFF” voltage output:
  • Output impedance: 1-100 ohms
  • Maximum voltage driven into output: 3.3V std. 5V, 9V opt.
  • Max output current: 50mA (Per Pin)   150mA (total)
  • CAP: 220pF

LI    LED Optically Isolated Digital Input

IOPIN:  A(Out) is the character used to specify the GPIO mode

  • 2 inputs in LI a and B are digital input that will light up an internal LED to optically isolate the LIs
    from the microcontroller unit (MCU) that monitors these inputs.
  • Max input Voltage (A to B):  48V
  • “ON” DC input voltage Range:  >1.5V
  • “OFF” DC input voltage Range   <0.8V
  • Input Current:  (Vin-1.0)/1000

AI    Analog Input.    Voltage input or 4-20mA current Input

IOPIN:  E (Volt) or F (Current) is the character to use to specify this type of GPIO

  • Input Configuration:  E: AIV (Voltage read)     F: AIC (Current Read)
  • E: Input impedance: 10K-15K
  • F: Input Impedance: 120 ohm
  • A to D resolution: 12 bit
  • Input Measurement Accuracy:  2%.
  • Input Sampling Time: 50mS – 2S configurable.
  • Smoothing: Selectable averaging: 1-8 samples.
  • Maximum Input voltage:  5V  R1 can be changed.
  • Temperature stability:  <  ±30 PPM/ºC

ADS   Analog Delta-Sigma Differential ADC

This is ultra high resolution ADC.  Analog inputs with differential voltage or current measurement.
(V or 4-20mA). 24bit high resolution ADC with configurable voltage levels.
Most products also have a current output option to use this to measure resistance, temperatures, or whatever.

IOPIN:  E (Volt) is the character to use to specify this type of GPIO

  • AP is Positive differential input
  • AN is Lower differential input
  • AC is mid-input Common voltage
  • Input Range Options: ±1V, ±5V, ±10V ±20V.
  • Input noise:  < 0.01uV.
  • Input Impedance: < 1mΩ
  • Usable Temperature: –40°C to +120°
  • ADC model: TI SBAS790C

RD   Relay Driver

A rugged MOSFET transistor is controlled by the RAZN to connect things to ground (GND).
Conencting relays, LEDs, lights, sirens, motors, or whatever can turn them ON when their GND pin is connect to ground via the RD.

The RD pin shorts to GND when this terminal is turned ON.  ON is digitally a one (1), so set this terminal to 1 or ON to have the MOSFET connect RD to GND.
If off, or 0, then the RD is open, not connected to anything.
A protection diode is on the RD pin to reduce noise from turning coils on and off.

VP  Diverted Voltage Power Output from DC input

VP is output DC voltage for you to use efficient power. DC input power to power the RAZN is passed out to the VP pin.
A MOSFET transistor switches VP voltage on or off. You can setup how and when to turn this on, or have it always on. 

Switch: MOSFET P
Voltage out:  VDD same as DC input powering product.
GND:  Same ground as product’s ground. Not isolated.

Use this to turn on your sensor when you want it on, and save power by having it turn off when the sensor or thing does not need to be on.

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