23 - 05 - 2019

AltonaLab Hardware Conception

AltonaLab has a specially developed concept for connecting analogue inputs with sensors and controlling relays from digital outputs.

 

Connecting analogue inputs 0..5V to sensors with output 0..5V:

For analogue inputs operating in range 0..5V, an extension board has been developed to allow easy connection of up to 4 sensors to analog inputs. In this board, the connection of the analog input and the sensor is direct, so there is no need for a mathematical transformation of sensor readings. The board has two power supply connectors, one of them is to power the board, the other is to power the next one board, if it is needed;

 

 

 

Connecting analogue inputs 0..3.3V to sensors with output 0..5V:

For analogue inputs operating in range 0..3.3V, an expansion board has a resistor divider for each analog input. In this case the conversion of the signal is:

Vout = Vin * (R2/(R1+R2)), where R1=1k, R2=2k, so Vout = Vin * 0.666666;

The board has two power supply connectors, one of them is to power the board, the other is to power the next one board, if it is needed;

 

Connecting digital inputs to contact sensors:

The output of some sensors are normal close contact. An example of this kind of sensors is Alarm sensor. The extension board below allows to connect up to 4 contact sensors to digital inputs.

 

 

Connecting fast contact sensor to analog input:

Some contact sensors are very fast, the contact Turns ON for milliseconds. For this case is developed the board below. When the contact closes, the output of the board will become at 5V for period between 2 and 8 seconds. The time duration depends of the potentiometer on the board. This time is enough to capture the high signal from a not too frequent measurement of the analog output of the board.

 

Controlling relays located at a long distance by digital outputs:

Special extension boards are developed for controlling an electrical load located at a long distance. For this purpose, supply the board with a power 12V and connect one or two of the controlling digital outputs. When the controlling digital output becomes to a high level, 12V appears on its corresponding board connector. On these 12V connector, a 12V electrical load can be directly connected or using two long wires we can connect a second relay board, located on a long distance.

The remote relay board has two connectors - one for supplying 12V to Turn ON the relay and one connector to which the normally open contact of the relay is connected.