4 Series/Parallel Operation
4.1 Series Operation
¡
Wiring method with series operation is shown in Fig.4.1.
The MS and SGND must be connected with each other.
Please use option part H-PA-14 for connecting between MS and
SGND.
Please decide one power supply (master power supply) to be op-
erated on the volume and short circuit between SLV_EN and COM
of the other power supply (slave power supply).
To short-circuit between SLV_EN and COM, please use option
part H-SN-53.
Use the Master when changing the output voltage.
If one of the units operated in series stops or fails, all the power
supplies are stopped by signal information of the MS terminal.
To start / stop use the remote ON/OFF control function. Connect
RC 2 and RCG of all power supplies to be operated in series and
start / stop all at the same time.
It is necessary to turn the power supply on again to switch the
mode of Master/slave.
When using in series operation, use products of the same model
name.
Implement H-PA-14
Implement H-SN-53
Load
No.3 (Slave)
No.2 (Slave)
No.1 (Master)
Fig.4.1 Connection method in series
*
Notes on series operation
(1) Constant current set value external variable function cannot be
used.
(2) When the overcurrent condition occurs, the latch stop operation
is performed.
In order to release the latch stop operation, input is shut down
and input is restarted after 10 seconds or setting the voltage of
RC2 terminal to logic to turn off output.
4.2 Parallel Operation/Master-slave Operation
¡
Wiring method with series operation is shown in Fig.4.2.
The MS and SGND must be connected with each other.
Please use option part H-PA-14 for connecting between MS and
SGND.
Please decide one power supply (master power supply) to be op-
erated on the volume and short circuit between SLV_EN and COM
of the other power supply (slave power supply).
To short-circuit between SLV_EN and COM, please use option
part H-SN-53.
Use the Master to change the output voltage.
If one of the units operating in parallel stops or fails, all the power
supplies are stopped by signal information of the MS terminal.
To start / stop use the remote ON/OFF control function. Connect
RC 2 and RCG of all power supplies to be operated in parallel and
start / stop all at the same time.
It is necessary to turn the power supply on again to switch the
mode of the Master/slave.
When using in parallel operation, use products of the same model
name.
As variance of output current drew from each power supply is
maximum 10%, the total output current must not exceed the value
determined by the following equation.
(Output current at parallel operation)
= (the rated current per unit) × (number of unit) × 0.9
¡
When the number of units in parallel operation increases, the in-
put current also increases. Please design input circuitry (including
circuit pattern, wiring and current capacity for equipment) carefully.
¡
Please make sure that the wiring impedance of a load from each
power supply becomes even. Otherwise, the output current bal-
ance circuit may become inoperative.
¡
The maximum number of units you can use in parallel operation is
3.
AC-DC Power Supplies Enclosed Type
Instruction Manual
PCA-13
