Current limiting schemes | Basic Programming |
Polarity and disconnect relays
Issuing the OUT 0 command, globally disables the outputs of all the Power Modules.
Turning the output on or off
Use the OUT <ch>,1 command to turn on the output of a specific Power Module.
Not that only if the other conditions mentioned at the top of this section are met then the Power Module’s output will be activated.
Use the OUT <ch>,0 command to turn off the output of a specific Power Module.
Each XMP 2600 Power Module has two sets of output relays: disconnect and polarity reversal.
Disconnect relays
The output disconnect relays are operated using the DISC <ch>,<mode> command, where <mode> can be either 1 for disconnect or 0 for connect.
Polarity reversal relays
The output polarity reversal relays are operated using the POL <ch>,<mode> command, where <mode> can be either 1 for negative or 0 for positive.
Auto polarity
The
When auto polarity is enabled, the polarity of the programmed Vset value automatically controls the state of the polarity reversal relays.
While auto polarity is enabled and the polarity of the corresponding output is reversed, voltage readback values have a minus sign preceding them.
To enable auto polarity, issue the POLEN 1 command. To disable auto polarity, issue the POLEN 0 command.
Current limiting schemes
Voltage / current mode
Foldback
The Power Modules of the XMP 2600 have 5 different output current limiting schemes. The following sections describe each of those schemes.
The output current limiting scheme is selected using the FOLD <ch>,<mode> command, where mode can have a value between 0 and 4.
This output current limiting scheme, selected using |
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mode = 0 (FOLD <ch>,0), instructs the Power Module to | V |
operate as either a voltage source or a current source with |
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automatic switching between the two modes of operation. | Vset |
This, default mode, is the most commonly used output | operating |
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current limiting scheme. The window workpoint warning |
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feature can be used in combination with this output current |
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limiting scheme to give you a more tight control over the |
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load’s behavior. |
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Foldback is an output current limiting scheme in which both output voltage and output current are reduced when the Power Module is operating as a current source (current limitation is active).
There are two types of output foldback to choose from: linear and
20 | XMP 2600 Programming Manual rev. 1.1 |
