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A closer look at AirQ 305 I/0 board

Yesterday we started shipping new AirQ 305 to our worldwide customers. And we are really happy that many of you liked it :-)

But we haven’t released complete specifications until now. So, let’s see all features of this new control board. AirQ 305 is a wireless controller board with 4 relays and 4 inputs. Each relay is tight to a three way terminal block (Normally Open, Normally Closed and COMmon). Relays are able to drive up to 10A of current. But if you plan to use them to drive AC loads, these are the exactly specifications of manufacturer:



Rated load (resistive / cosφ=1) 6A @250 VAC (NO/NC)     10A @120 VAC (NO/NC) 

10A @24 VDC (NO/NC)

Rated carry current 10A
Max. switching voltage 250 VAC     24 VDC
Max. switching current 15A

Different from other AirQ Networks control boards, inputs in AirQ 305 are voltage driven. This solution is more flexible compared to voltage free inputs, since they can be used both in case of dry and hot contacts. However, inputs can’t be used with every type of voltage and, keep in mind that they can’t be used with AC source. Input voltage ranges from 3VDC up to 24VDC. This upper limit can be extended using a voltage limit resistor. If you need to interface a dry contact (eg, a switch), you can sink +12VDC from power supply, as shown in the following picture. Inputs are opto-isolated: this is really useful if the input voltage is noisy.


Compared to AirQ 310 and AirQ 300 control boards, this one doesn’t provide a battery changer and management IC. So the board can be powered only through a power adapter. The reason of this choice was to keep the selling price as low as possible. If fault tolerance is demanding, consider buying an AirQ 310 or 300 control board.

These are the hardware characteristics of AirQ 305. But it introduces interesting functionalities too. AirQ 305 relays can operate in three different modes:

  • ON/OFF mode: the relay is set to be ON or OFF.
  • Pulsed mode: relay is set to pulse for a short time (0.5s, 1s and 2s). Pulse can be run both from ON state and OFF. If relay is ON, a pulse command will turn OFF relay; if it’s OFF, a pulse command will turn it ON.
  • Timed mode: relay will be turned ON for a specified number of seconds.

Timed mode was introduced for the first time in AirQ 305 (AirQ 300 and 310 still doesn’t implement this feature) and it’s really interesting. Let’s suppose we need to drive a motor that need to operate only for few seconds: this feature allows to turn ON the relay for a specified time. Timed mode is set using the AIRQ305::setRELAYx() method, setting the optional “duration” parameter. For example, to turn on the RELAY1 for 5 seconds, the setRELAY1() method is called in the following way:

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2 Responses to A closer look at AirQ 305 I/0 board

  1. Pingback: A closer look at AirQ 305 I/0 board | AirQ Networks Development Blog |


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