POLITEC s.r.l. | Sandor Dual Sma manual – Ver. 2.4
7
4
CABLES AND WIRING
The wiring requires to SEPARATE the power cable 12Vdc (ex. 2x0.5 + Nx0.22),to the power
cable for heaters 24Vac (ex. 2x0.75) to prevent input of disorders of the AC voltage on the
barrier.
N.B. is absolutely necessary to shield the cable that provides 12 Vdc power supply and put
the metal braid to ground.
The cable size depends on the consumption of the columns and the resistance of the cable to the distances
involved.
The table shows the cable sections and the relative distances to which they provide optimum performance using
the supplier LAR22 (12Vdc - 2,5A / 24V AC-300W) and a barrier SANDOR DUAL SMA.
Cable
section
12Vdc
24Vac
0,5 mm²
165 m
35 m
0,75 mm²
245 m
50 m
1,5 mm²
490 m
100 m
2,5 mm²
820 m
165 m
4 mm²
1310 m
265 m
6 mm²
1975 m
400 m
N.B. THE LAR22 IS NOT WATERPROOF, MUST BE PLACED INSIDE A LOCAL OR PLACED IN
A SEALED CONTAINER FOR USE OUTSIDE.
Is possible use the power supplier LAR18 (12Vdc – 0,9A / 24VAC-60W) to supply a single column.
