Download Manual

NOTE
With local sensing it is important to minimize the wire length and resistance. Also the
positive and negative wire resistance should be close as possible to each other to achieve
current balance between power supplies.
+S
To J1-10
SLAVE#2
POWER SUPPLY
-S
+S
MASTER
POWER SUPPLY
J1-25
P
IPGM
J1-8 J1-12 J1-10
To J1-23
SLAVE#2
POWER SUPPLY
-S
Twisted
pair
As short as possible
-V
Twisted
pair
CAUTION
Make sure that the
connection between -Vo
terminals is reliable to
avoid disconnection
during operation.
Disconnection may cause
damage to the power
supply.
+S
J1-12 COM
+
IPGM_RTN
J1-23
-
LOAD
+V
SLAVE#1
POWER SUPPLY
-S
+V
-S
-V
+S
Twisted
pair
-S
+S
Fig.5-5: Parallel operation with Remote sensing
5.16 DAISY-CHAIN CONNECTION
It is possible to configure a multiple power supply system to shut down all the units when a fault
condition occurs in one of the units. When the fault is removed, the system recovers according to its
setting to Safe start mode or Automatic restart.
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 a fault occurs in one of the units its PS_OK signal will be set to low level and the display will indicate
the fault. The other units will shut off and their display will indicate "SO”. When the fault condition is
removed, the units will recover to their last setting according to their Safe start or Auto-restart setting.
Fig.5-6 shows connection of three units, however the same connection method applies to systems
with a larger number of units.
POWER SUPPLY
J1-2,3
#1
J1-16
IF_COM
POWER SUPPLY
J1-2,3
J1-15
#2
J1-16
IF_COM
PS_OK SO
POWER SUPPLY
#3
J1-15
PS_OK
SO
J1-2,3
J1-16
IF_COM
J1-15
PS_OK
SO
Fig.5-6: Daisy-chain connection
5.17 FRONT PANEL LOCKING
The front panel controls can be locked to protect from accidental power supply parameter change.
Press and hold PREV button to toggle between “Locked front panel” and “Unlocked front panel”.
The display will cycle between “LFP” and “UFP”. Releasing the PREV button while one of the
modes is displayed, selects that mode.
5.17.1 Unlocked front panel
In this mode, the front panel controls are enable to program and monitor the power supply
parameters.
5.17.2 Locked front panel
In this mode the following front panel controls are disabled:
- VOLTAGE and CURRENT encoders.
- FOLD button.
- OUT button.
The power supply will not respond to attempts to use these controls. The VOLT display will show
“LFP” to indicate that the front panel is locked.
OVP/UVL button is active to preview the OVP and UVL setting.
Use PREV button to preview the output voltage and current setting or to unlock the front panel.
43