21
6
APPENDIX
Ⅲ
THE RELATIONSHIP BETWEEN AC 24V
CABLE DIAMETER AND TRANSMISSION DISTANCE
The max transmission distance is recommended when the cable diameter is fixed and AC 24V
voltage loss rate is lower than 10%. For the AC power supply devices, the max allowed voltage
loss rate is 10%. For example, a device with rated power of 20W, installed 141 feet (42m) away
from the transformer, the minimum wire diameter needed is 0.8000mm.
mm
Feet
(
m
)
w
0.8000
1.000
1.250
2.000
5
488.52
(
148.90
)
763.31
(
232.66
)
1192.67
(
363.53
)
3053.25
(
930.63
)
10
244.26
(
74.45
)
381.66
(
116.33
)
596.34
(
181.76
)
1526.62
(
465.31
)
15
162.84
(
49.63
)
254.44
(
77.55
)
397.56
(
121.18
)
1017.75
(
310.21
)
20
122.13
(
37.23
)
190.83
(
58.16
)
298.17
(
90.88
)
763.31
(
232.66
)
25
97.70
(
29.78
)
152.66
(
46.53
)
238.53
(
72.71
)
610.65
(
186.13
)
30
81.42
(
24.82
)
127.22
(
38.78
)
198.78
(
60.59
)
508.87
(
155.10
)
35
69.79
(
21.27
)
109.04
(
33.24
)
170.38
(
51.93
)
436.18
(
132.95
)
40
61.06
(
18.61
)
95.41
(
29.08
)
149.08
(
45.44
)
381.66
(
116.33
)
45
54.28
(
16.54
)
84.81
(
25.85
)
132.52
(
40.39
)
339.25
(
103.40
)
50
48.85
(
14.89
)
76.33
(
23.27
)
119.27
(
36.35
)
305.32
(
93.06
)
55
44.41
(
13.54
)
69.39
(
21.15
)
108.42
(
33.05
)
277.57
(
84.60
)
60
40.71
(
12.41
)
63.61
(
19.39
)
99.39
(
30.29
)
254.44
(
77.55
)
65
37.58
(
11.45
)
58.72
(
17.90
)
91.74
(
27.96
)
234.87
(
71.59
)
70
34.89
(
10.64
)
54.52
(
16.62
)
85.19
(
25.97
)
218.09
(
66.47
)
75
32.57
(
9.93
)
50.89
(
15.51
)
79.51
(
24.24
)
203.55
(
62.04
)
80
30.53
(
9.31
)
47.71
(
14.54
)
74.54
(
22.72
)
190.83
(
58.16
)
85
28.74
(
8.76
)
44.90
(
13.69
)
70.16
(
21.38
)
179.60
(
54.74
)
90
27.14
(
8.27
)
42.41
(
12.93
)
66.26
(
20.20
)
169.62
(
51.70
)
95
25.71
(
7.84
)
40.17
(
12.25
)
62.77
(
19.13
)
160.70
(
48.98
)
100
24.43
(
7.45
)
38.17
(
11.63
)
59.63
(
18.18
)
152.66
(
46.53
)
Содержание SD8A240VI-HNI
Страница 19: ...12 Figure 2 12...
Страница 23: ...16 Figure 3 4...