66
83503001 Rev G
MASTER
POWER SUPPLY
SLAVE#1
POWER SUPPLY
J1-25
J1-10
P
IPGM
J1-12
J1-23
P
IPGM_RTN
+
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
To J1-23
SLAVE#2
POWER SUPPLY
+S
+LS
-LS
-S
Fig. 5-5: Parallel Operation with Remote Sensing
CAUTION
Make sure that the connection between –Vo terminals is reliable to avoid disconnection
during operation. Disconnection may cause damage to the power supply.
NOTE
1. In parallel operation, the AC Supply should be applied to the Master Unit and then to the
slave unit.
2. The above sequence is not required if the units are connected in daisy-chain.
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
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 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
systems with a larger number of units.
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. 5-6: Daisy-Chain Connection