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83
-
507
-
013 Rev. D
19
CAUTION
When local sensing, a
short from +LS or +S to
-
V or
-
S or
-
LS,
will cause damage to the power supply. Reversing the sense
wires might cause damage to the power supply in local and
remote sensing. (Do not connect
-
S to +V or +S to
-
V).
2.
Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the rate
d
current. Although units will compensate for up to 5V in each load wire, it is recommended to
minimize the voltage drop (1V typical maximum) to prevent excessive output power consum
p-
tion from the power supply and poor dynamic response to load changes. Ple
ase refer to T
a-
bles 3
-
2 and 3
-
3 for minimum wire length (to limit voltage drop) in American and European d
i-
mensions respectively.
Maximum length in Feet to limit
voltage drop to 1V or less
Wire size
AWG
Resistivity
OHM/1000ft
5A
10A
20A
50A
150A
14
2
.526
80
40
20
8
2
12
1.589
120
60
30
12
3.4
10
0.9994
200
100
50
20
6
8
0.6285
320
160
80
32
10
6
0.3953
500
250
125
50
16
4
0.2486
800
400
200
80
26
2
0.1564
1200
600
300
125
40
0
0.0983
2000
1000
500
200
68
Table 3
-
2: Maximum wire length for 1V d
rop on lead (in feet)
Maximum length in meters to limit
voltage drop to 1V or less
Cross sect.
area
(mm
²
)
Resistivity
OHM/Km
5A
10A
20A
50A
150A
2.5
8.21
24.0
12.0
6.0
2.4
0.8
4
5.09
39.2
18.6
9.8
4.0
1.4
6
3.39
59.0
29.4
14.8
5.8
2.0
10
1.95
102.6
51.2
25.6
10.2
3.4
16
1.24
160.0
80.0
40.0
16.0
5.4
25
0.795
250.0
125.0
62.0
25.2
8.4
35
0.565
354.0
177.0
88.0
35.4
11.8
Table 3
-
3: Maximum wire length for 1 V drop on lead (in meters)
For currents not shown in Table 3
-
2 and 3
-
3, use the formula:
Ma
ximum length=1000/(current x resistivity)
Where current is expressed in Amperes and resistivity in ohms/km or ohms/1000ft.
3.9.3
Wire termination
The wires should be properly terminated with terminals securely attached. DO NOT use unterminated
wires for load con
nection at the power supply.