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RCB1200 output modules of the same type can be paralleled in any number within the same section to achieve higher output
currents. Paralleling across the two sections in the same chassis is not possible without external protection (such as external
diodes or controlled MOSFETs) to prevent circulating currents between them. Failure to provide such protection may result in
damage to the units.
WARNING!
Energy hazards may arise when individual modules are paralleled. See the Safety section for more details.
For best performance, the output voltages of each paralleled module should be adjusted as close as possible.
Follow the procedure below to achieve the most accurate results:
1.
Connect all the negative power cables together.
2.
Adjust the first module (1) to the desired voltage.
3.
Connect a voltmeter between the positive terminal of the first module (1) and the positive terminal of the
second module (2) and adjust the second module (2) until the voltmeter reads 0.000 volts.
4.
Repeat step 3 for the remaining modules, always using the positive terminal of the first module (1) as the
reference.
When paralleled, the outputs can operate in two distinct modes, Normal parallel mode or Share parallel mode.
Normal parallel mode
For normal parallel mode, the positive power cables should be connected together and the negative power cables should be
connected together. No other connections are required as shown in the diagram below.
In this mode the highest adjusted output module will supply all of the load current until its current limit is reached. If the load
demand exceeds this level the output voltage will drop to the level of the next highest adjusted module and that module will
begin to supply the load current while the first module continues delivering full current. This process repeats for the total
number of paralleled modules. The diagram above shows the V-I curve for such a system.
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