Videotec GEKO IRN - Manual (Page 10)

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7.1.4 Maximum cable length
Depending on the type of illuminator and supply
voltage, comply with the following maximum
distances for the power cables.
Power supply 12Vdc: A 0.6V voltage drop is allowed
on the cables. Minimum voltage of 11.4Vdc at the
power cable input provided with the illuminator.
CABLES SPECIFICATIONS (12VDC POWER SUPPLy)
Cable sec-
tion (mm²)
AWG Maximum distance (m)
0.75 18 4.5
1 17 6.5
1.5 16 9
2.5 14 15
4 10 24
Tab. 3
Power supply 24Vac: Maximum 3V voltage drop is
allowed on the cable. Minimum voltage of 21Vac at
the power cable input provided with the illuminator.
CABLES SPECIFICATIONS (24VAC/VDC POWER
SUPPLy)
Cable sec-
tion (mm²)
AWG Maximum distance (m)
0.75 18 35
1 17 50
1.5 16 80
2.5 14 120
4 10 200
Tab. 4
Power supply 90/240Vac: The cable section is less
critical, therefore, it is sufficient to ensure that the
ground connections is efficient for safety reasons.
We recommend using a section of at least 0.75mm²
(AWG18).
Control cable: External command, Colours red and
Green. Follow command, colours White and Black.
Use a minimum section cable of 0,34mm² (AWG22)
and a minimum distance of 200m.
7.1.5 Adjusting the activation threshold
Switch-on threshold
regulation
Infrared illuminators
power setting
Fig. 8
7.1.5.1 Photocell sensitivity
The illuminator has an integrated photocell that
allows its automatic activation and deactivation at
predefined luminous conditions.
The photocell is set in the factory at a predetermined
luminous level, suitable for most installations
(approximately 50Lux). In the event the intervention
threshold (illuminator activation) must be adjusted
differently, loosen the plug on the illuminator rear
and proceed adjusting.