TDK-Lambda ZUP36-12 - Page 20

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For current not shownintables 3-1 and 3-2 use formula: Maximumlength=500/(current*resistivity)
Where current is expressed in ampers and resistivity in ohms/km or ohms/1000ft.
Table 3-2: Maximumwirelength for 0.5V drop on lead (inmeters)
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 Singleloadconnection, Local Sensing
The wires shouldbe 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 asingleload 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 between +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
at local and remote sensing.