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Figure
3-6.,
Remot~ Sensing
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rent thnn the load lead~ and' It Is not required that
these leads be 'as' heavy as the load lead!,~., How-'
ever, they must be twisted or shielded to mlrtimlze
noise pickup.
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3-31.
Note that it is desirable to minimize the
voltage drop In the load leads and It Is recommend-
1ed that'the drop not exceed l Vo,lt per,,lead If the
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power supply Is to meet its de specifications.
.If
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larger droj:, must be tolerated, please consult a
~ sales engineer..
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NOTE
'')ue to the voltage drop In the load.
leads, It may be necessary to read-
Justthe current limit In the remote
sensing mode.
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3-32
Although the strapping· patterns shown in
Figures 3-3 through 3-5 employ local sensing,
note that it Is possible to ope~ate a power supply
simultaneously In the reinote sensing 'and Constant
Voltage/Constant Current remote programming
modes.
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Figure 3-7. Normal ParaUel Connections
~-33,.
PARALLEL OPERATION,
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3-34, Normal Parallel Connections (Figure 3-7).
Two or, more p,iwer supplies can be connected In
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parallel to obtain a total output current greater,
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than that available from one power supply. The
totaloutput current Is the sum of the output cur-
rents of the Individual power supplies. The output
CURRENT, controls of each power supply can be
separately set. 'fhe'output voltage controls of
' one power supply should be set to the desired out-
'put voltage; the other power supply should be· 'set',
for a slightly larger output voltage. The supply
set' to the lower output voltage will act as a con-
stant,voltage source; the supply set to the higher
output will act as a constant current source, drop-
'ping Its output voltge until It equa~s that of the '
other supply,, The constant,voltage source will
deliver only that fraction of Its total rated output.,
current ·which Is necessary to fulfill the total cur-
rent demand.
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Figure
3.:.a.
Auto Para lie I, Two and Three Uni ts
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· 3-35 Auto-Parallel. The strapping patterns for
Auto-Parallel operation of three power supplies
are shown In Figure 3-8. Auto-Parallel operation
permits equal current sharing under all load con-
ditions,' and allows complete control of the output
current from one master power supply. The output
current of each, slave will
be
approximately equal
to the master's regardless of the load conditions.
Because the. output current controls of each slave
are operative, they should
be
set to maximum to
avoid having the slave revert to constant current
3-4 '
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