Technical glossary

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1/4-Wave atenna

The antenna length corresponds to a quarter of the 433 MHz wavelength in vacuum : i.e. 17 cm

1/2- Wave atenna

The antenna length corresponds to half the 433 MHz wavelength in vacuum : i.e. 34 cm.
This antenna is thus twice longer than the 1/4-wave antenna. It improves the radio reception by 3db compared with a 1/4-wave antenna
Consequently, the useful power received by the receiver is doubled and the range is multiplied by 1.4.

Pairing

It is used to define which transmitter(s) is working with which receiver(s)

Active stop

It is a priority order used for the safety stop.

Passive Stop

It is a safety stop by default if:

  • There is no more link between transmitter and receiver
  • There is interference in the frequency used by another system on the same frequency
  • The transmitter is too far away from the receiver

The receiver stops by itself.

Identity code

It is a specific code for the transmitter-receiver pair.
Yt allows the receiver to recognize the matching transmitter during radio communications.

Harmonic

Frequency multiple of the fundamental frequency.
The harmonic emission power is voluntarily residual in our applications, this to the benefit of the fundamental frequency.

IK Index

Mechanical impact resistance rate according to standard NF50 102.
example : remote case IK08 : Shock test energy = 5 Joules

IP Index

Material protection rate : the 1st digit indicates the protection against dust and the 2nd the protection against water projections.
examples :

Remote case IP40 :
4 : Protected against solid bodies bigger than 1mm (fine tools, small wires)
0 : No protection against water projections

remote case IP44 :
4 : Protected against solid bodies bigger than 1mm (fine tools, small wires)
4 : Protected against water projections from all directions

remote case IP52 :
5 : Protected against dust (no harmful deposit)
2 : Protected against water drop falls up to 15° off the vertical

remote case IP55 :
5 : Protected against dust (no harmful deposit)
5 : Protected against water jets from all directions

remote case IP56 :
5 : Protected against dust (no harmful deposit)
6 : Protected against water projections comparable to big waves

remote case IP65 :
6 : Full protection against dust
5 : Protected against water jets from all directions

Interlocking

Mechanical or electric process which prevents the activation at same time of 2 contradictory movements like "forward-backward", "right-left" for example.

EEPROM Memory

Re-programmable memory.
It keeps information even when the power supply is off.

Multiplexing

Process allowing to establish several communication channels on the same transmission medium.

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