Appendix C: Power supply requirements
C.1. Input voltage
To ensure that the input voltage at the lidar's Lemo connector is 9 to 36 V DC, please check the specifications of the power source and the voltage
drop over cables.
C.1.1. Calculate the cable voltage drop
Using the estimation formula
We recommend using 26 AWG cables, which is the thickest wire gauge supported by the lidar.
•
Define the cable length from the power source to the lidar's Lemo connector as L (unit: m)
•
When using 26 AWG cables, the estimated cable resistance is r = 0.3L (unit: Ω)
•
Define the source voltage as U
in
(V).
The cable voltage drop of the lidar operating at 10 Hz under room temperature (23 ± 5°C) can be estimated:
Using the lookup table
As shown in the table, when the cable length exceeds 10 m, source voltage should be greater than 24 V.
Cable Total Length L Source Voltage U
in
= 12 V Source Voltage U
in
= 24 V Source Voltage U
in
= 36 V
1.5 m 0.39 V 0.19 V 0.13 V
2 m 0.52 V 0.25 V 0.17 V
5 m 1.42 V 0.64 V 0.42 V
10 m 3.55 V (lidar's input voltage < 9 V) 1.32 V 0.85 V
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