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83-530-000 Rev J
6.3. Daisy-Chain for Shut-Off
It is possible to configure a multiple power supply system to shut down all the units when an
“Output Off” command is sent or a fault condition occurs in one of the units.
Setup switch SW1 position 5 should be set to its Down position to enable the Daisy-chain
operation. Other SW1 positions can be set according to the application requirements.
If any one supply turns off for any reason, its PS_OK signal will be set to low level and the
display will indicate “Off” or the fault. The other units will shut off and their display will indicate
a shut-off fault “SO”.
When the “Output On” command is sent or the fault condition is removed, the units will
recover to their last setting according to their Safe start or Auto-restart setting.
Fig.6-6 shows connection of three units, The same connection method applies to systems of
more supplies.
6.4. Advanced Parallel Operation
In this method, multiple supplies are configured as a basic parallel system but the master
supply is set to be the single-point display for the programming, measurement and status of
all the supplies. The slave supply front panels are essentially disabled.
NOTE
In an Advanced Parallel system, the output current measured by the master
supply is only the master’s current multiplied by two, three or four (depending on
the number of slaves).
The total paralleled current may be different, subject to the combined output
errors of the slaves.
It is required to use the shut-off daisy-chain with Advanced Parallel.
The wiring for Advanced Parallel, including the loads, sense and J1 analog control, is
identical to the basic parallel system described above. Advanced Parallel is a firmware
feature.
POWER SUPPLY
#
1
J1-2,3 J1-16
J1-16
J1-16
J1-15
PS_OK
POWER SUPPLY
#
2
J1-2,3 J1-15
PS_OK
SO
POWER SUPPLY
#3
J1-2,3
J1-15
PS_OK
SO
SO
IF_COM
IF_COM
IF_COM
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