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For current not shown in tables 3-1 and 3-2 use formula: Maximum length=500/(current*resistivity)
Where current is expressed in ampers and resistivity in ohms/km or ohms/1000ft.
Table 3-2: Maximum wire length for 0.5V drop on lead (in meters)
cross sect.
area
(mm 2)
5A
12.2
6.1
3.0
1.2
0.4
19.6
9.8
4.9
2.0
0.7
29.5
14.7
7.4
2.9
1.0
51.3
25.6
12.8
5.1
1.7
80.6
40.3
20.2
8.1
2.7
125.8
62.9
31.4
12.6
4.2
177.0
88.5
44.2
17.7
5.9
2.5
4
6
10
16
25
35
8.21
5.09
3.39
1.95
1.24
0.795
0.565
Maximum length in meters -
to limit voltage drop to 0.5V or less
10A
20A
50A
150A
<
Resistivity
Ohm/km
3.7.2 Wire termination
3.7.3 Single load connection, Local Sensing
The wires should be properly terminated with terminals securely attached. DO NOT use non
terminated wires for load connection at the power supply.
Fig. 3-1 illustrates the connection of a single load to the power supply using local sensing. This
connection is made via the “External Control Connector” located on the rear panel of the power supply.
Local sensing is suitable for applications where load regulation is not critical.
Fig. 3-1: Single load connection, Local Sensing
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2
- LS
- S
- V
- S
+LS
+LS
- LS
+S
On/Off
+V
- S
COM
Output Good
P
VRFV
VCVP
VRFI
VCCP
RCVP
EXTERNAL CONTROL
CONNECTOR
(ZUP rear panel view)
LOAD
POWER
SUPPLY
+
_
RCCP
1
CAUTION
At local sensing, short bLS 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
at local and remote sensing.
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