2 Installation
Setting the Over-Voltage Protection
The master unit OVP should be programmed to the desired OVP level. The OVP of the slave units should be programmed to a higher value than the master. When the master unit shuts down, it programs the slave unit to zero output voltage. If a slave unit shuts down when its OVP is set lower than the master output voltage, only that unit shuts down and the remaining slave units will supply all the load current.
Setting the Over-Current Protection
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| unit. When the master unit shuts down, it programs the slave units to |
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| zero output voltage. |
Series Connections |
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| SHOCK HAZARD For models up to 60VDC rated output, no point shall be more |
| WARNING | |
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| than |
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| output, no point shall be more than |
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| There is also a potential shock hazard at the IEEE/LAN/USB ports when |
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| using power supplies with rated or combined voltages > 400VDC with the |
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| positive output of the power supplies grounded. Do not connect the positive |
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| output to ground when using the IEEE/LAN/USB under the above conditions. |
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| Only power supplies that have identical voltage and current ratings can be |
| CAUTION | |
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| connected in series. |
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| Two units of the same voltage and current rating can be connected in |
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| series to provide up to two times the output voltage capability. |
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| Because the current is the same through each element in a series |
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| circuit, outputs connected in series must have equivalent current |
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| ratings. Otherwise, the higher rated output could potentially damage |
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| the lower rated output by forcing excessive current through it under |
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| certain load conditions. Refer to the following figures for typical |
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| series connections using either local or remote sensing. |
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| It is recommended that diodes be connected in parallel with each |
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| output to prevent reverse voltage during start up sequence or in case |
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| one unit shuts down. Each diode should be rated to at least the rated |
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| output voltage and output current of the power supply. |
30 | Series N5700 User’s Guide |
