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Parallel Operation
Current Share Operation
Group Operation
Group Configuration
Group Protection
Parallel operation provides the possibility of connecting a number of devices together to create a system with higher
total current and, hence, higher power. Refer to
outputs, share cables, and master/slave cables.
Current Share Operation
The current SHARE cables must be connected on all paralleled units as previously described under Paralleled Con-
nections.
The current share cables allow identical units to share current approximately equally in voltage priority mode. Oper-
ation continues until the total current limit of the paralleled group is reached. No additional external connections or pro-
gramming commands are required.
The following list details the current sharing operation:
Program the output voltage of each paralleled unit to the same value.
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Set the current limit of each paralleled unit so as not to interfere with the expected current sharing level. When
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the current limit setting of any paralleled unit is reached, the output current of that unit will limit at its specified
setting. If the current limit of the remaining units is set to a higher value, those units will continue to share cur-
rent until their current limit is reached.
Current sharing continues until the current limit of the group is reached. This allows current to be shared equally
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among participating units without any additional external connections or programming considerations.
Group Operation (master/slave)
In addition to the current Share function, which must be used with paralleled units, you can also Group the paralleled
units, with one unit configured as a master controlling up to 9 additional units. Grouping units provides the following
benefits:
Program the Output, Transient, Protect, and States functions on only one unit. The programmed settings will auto-
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matically be distributed to the connected units.
The master unit displays, or makes available to be read by the remote controller, the sum of the actual current val-
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ues of all the units. The output current of the slave units can be queried individually.
The range for setting the values of the master unit is dependent on the number of paralleled units. For example, if
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5 units each with a current rating of 90 A are connected to form a 450 A system, then the master can be pro-
grammed to provide current in the range from 0 to 450 A.
The Group configuration is saved in non-volatile memory.
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Agilent N8900 Series Operating and Service Guide
Parallel Connections
for detailed information on how to connect the
Parallel Operation
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