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83507013 Rev G
Master unit’s control. The Output Current setting of each unit should be
programmed to the desired load current divided by the number of parallel
units.
2. Set the rear panel setup switch SW1 position 2 to the up position.
3. Set SW1 position 3 of Slave same as SW1 position 4 of Master (both 5V or
10V).
4. Connect a wire jumper between J1-8 and J1-12 (refer to Table 4-4).
5. Connect J1 terminal 10(IPGM) of the slave unit to J1 terminal 25(P) of the
master unit.
During operation, the Slave units operate as a controlled current source following
the Master Output Current. It is recommended that the power system be
designed so that each unit supplies up to 95% of its current rating because of the
imbalance which may be caused by cabling and connection voltage drop.
3. Daisy Chain Connection: (See Fig. 5-6)
These set up and connections are optional but are strongly recommended. It will
shut down all power supplies when a fault condition occurs in any one of them.
1. Switch SW1 position 5 should be in its down position for all power supplies.
2. Connect J1-16 of the Master Supply to J1-
15 of the ‘First’ Slave Supply (If
any).
3. Connect J1-
16 of the ‘First’ Slave Supply to J1-15 of the ‘Second’ Slave
Supply (if any).
4. Connect J1-
16 of the ‘Second’ Slave Supply to J1-15 of the ‘Third’ Slave
Supply (If any).
5. Connect J1-
16 of the ‘Last’ Slave Supply to J1-15 of the master supply.
6. Connect J1-2 (or J1-3) common to all supplies (See Fig. 5.6).
4. Setting Over Voltage protection
The Master unit OVP setting should be programmed to the desired OVP level.
The OVP setting of the slave units should be programmed to a higher value than
the Master OVP. 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 Slave unit would shut down, and the
remaining Slave units would supply all of the load current.
5. Setting Foldback Protection
Foldback protection, is desired, may only be used with the Master unit. When the
Master unit shuts down, it programs the Slave units to zero Output Voltage.
6. Connection to the load
In parallel operation, power supplies can be connected in local or remote
sensing. Refer to Fig. 5-4 and 5-5 for typical connections of parallel power
supplies. The figures show the connection of two units, however, the same
connection method applies for up to 4 units.
5.15.2 Advanced Parallel Operation
In this method, multiple supplies can be configured to parallel operation as a
single power supply. The total load current and output voltage are displayed by
the Master unit and can be readback from the Master unit. The Slave units
display only their operating status (On, Off or Fault condition).
Refer to the following procedure to configure multiple supplies for advanced
parallel operation.
