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Power

The RTU is powered at low voltage (12V
power supply module (RTU-Qxx). In order to determine the correct size for
power cables, refer to the table below. Max voltage cable drop = 1,0VDC for
assure that in battery power working, when battery min voltage is 10,5V the
min RTU power supply
Type of cable
AWG
mm2
ohm/Km 150 [mA] 300 [mA] 600 [mA]
12
3,3
14
2
16
1,3
18
0,9
20
0,6
22
0,35
24
0,2
When the cables go out-of-doors is mandatory to use shielded cables. The
cables' shielding must be connected to the ground connector.
For internal wiring without shielded cables is recommended an electrical
environment where the cables are well separated, even at short runs,
especially to the power cables or external cables which can be essentially
subjected to interference or lighting.
Power
9,5V (min RTU voltage).
Length (m) in relation to effective load
5,7
585
292
8,8
379
189
14
238
119
21
159
79
34
98
49
52
64
32
85
39
20
+12V Ground
150mA) by a battery-operated
DC
1,2 [A]
2,4 [A]
117
58
76
38
48
24
32
16
20
10
13
6
8
4
29
19
12
8
5
3
2
Page 9

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