Installation Guide

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VisionPass - 2019_2000045728
4.2 > Power Supply
External Power supply
1-3 Red Power Supply 12-24V DC In Positive 12-24 Volts, power supply
2-4 Black Power ground In Ground power supply
Figure 18: Power supply wiring
The External power supply
Must comply with IEC 60950-1 standard marked Class 2, Limited Power source (LPS)
12V to 24V DC (regulated and filtered) 3A min at 12V.
If sharing power between devices, each unit must receive 3A (e.g. two units would require a 12vDC,
6A supply).
IDEMIA recommends using a 24V power supply and AWG16 gauge cable. The voltage measured on the
product block connector of the terminal must be equal to 12V-24V (-15% / +10%).
The voltage drop due to the cable shall be taken into account. The table below shows as an example the
maximum distance between power supply and one (1) unique device, depending on cable gauge and
power supply rating.
Gauge
AWG
Section
(mm
2
)
Maximum distance (meters)
vs power source rating
12V+/-10% 12V+/-5% 24V+/-10%
16 1.31 9 m 20 m 300 m
18 0.82 6 m 12 m 200 m
20 0.52 3 m 8 m 120 m
22 0.32 2 m 5 m 75 m
If several terminals are powered by the same cable, make sure to select a wire gauge that
complies with maximum voltage drop, cable length, and power source minimum voltage
rating.