Lambda LJS-10-V Series Instruction Manual page 11

| efore programming, adjust programming resistor for zero resistance and set voltage adjust control to the
imum rated output voltage. Output voltage of programmed supply will nominally be minimum output
oltage plus 1 volt per 1000 ohms.
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| As shown іп figure 5, voltages сап be programmed utilizing either local or remote sensing connections, as
pos
И nm med Voltage Connections Using Programming Voltage, Figure 6. The power supply voltage output
'can be programmed with an externally connected programming power supply. The output voltage change of
¡the programmed supply will maintain a one-to-one ratio with the voltage of the programming supply. If the
‚output voltage control of the programmed supply is set to minimum output voltage, output voltage of the
programmed supply will be minimum output voltage plus voltage of programming supply.
| The programming supply must have a reverse current capability of 1.1ma. minimum.
| Alternatively, when supplies with less than 1.1ma. reverse current capability are used, a resistor capable
of drawing 1.1ma. at the minimum programming voltage must be connected across the output terminals of
the programming supply. This programming supply must be rated to handle all excess resistor current at the
¡maximum programming voltage.
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| Connections For Series Operation, Figure 7.
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The voltage capability of LJS-10-V power supplies can be extended by series operation. Figure 7 shows
the connections for either local or remote sensing in a series connection where the voltage control of each unit
functions independently to control the output.
A diode, having a current carrying capability egual to or greater than the maximum current rating of the
supply, must be used and connected as shown in figure 7. The diode blocking voltage should be at least twice
the maximum rated output voltage of the supply. See table I, of SPECIFICATIONS AND FEATURES, for
power supply current and voltage ratings.
OPERATION AFTER PROTECTIVE DEVICE SHUTDOWN
Fuse Shutdown. Fuse will blow when the maximum rated current value for the fuse is exceeded. Fatigue
failure of fuses can occur when mechanical vibrations from the installation combine with thermally induced
stresses to weaken the fuse metal. Many fuse failures are caused by a temporary condition and replacing the
blown fuse will make the fuse protected circuit operative.
Overvoltage Shutdown. When the power supply output voltage increases above the overvoltage limit, the
overvoltage protection circuit will short circuit output of the supply and shut down inverter operation.
After eliminating the cause(s) for overvoltage, resume operation of the supply by momentarily interrupting
the AC input circuit.
IM-LJS-10-V 4