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83-507-5002 Rev. B
44
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 be-
tween power supplies
Fig.5-6: Daisy-chain connection
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
Fig.5-5: Parallel operation with Remote sensing
MASTER
POWER SUPPLY
SLAVE#1
POWER SUPPLY
J1-25
J1-10
P
IPGM
+
V
-
V
+
V
-
V
+S
-S
LOAD
As short as possible
Twisted
pair
+S-S
+S
-S
Twisted
pair
J1-8 J1-12
To J1-10
SLAVE#2
POWER SUPPLY
+S
+LS
-LS-S
CAUTION Make sure that the connection between –V terminals is reliable to avoid disconnection
during operation. Disconnection may cause damage to the power supply.
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 or Auto-restart mode.
Setup switch SW1, position 5 should be set to its DOWN position to enable the Daisy-chain op-
eration. 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 a 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 sys-
tems with a larger number of units.
5.17 FRONT PANEL LOCKING
The front panel controls can be locked to protect from accidental power supply parameter
change. Press and hold the 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.