83
-
507
-
013 Rev. D
43
c) The Master and Slave modes a
re stored in the power supply EEPROM when the AC power is turned
off. The system will return to the Ma
s
ter/Slave mode upon re
-
application of AC power.
4. CURRENT display accuracy
In the advanced parallel mode, the Master unit calculates the total current b
y multiplying the Master
output cu
r
rent by the number of Slave units. In this method, the CURRENT display accuracy is 2% +/
-
1
count. In cases that higher accuracy is required, it is recommended to use the basic parallel operation
mode.
5.
To release units f
rom Slave mode
Slave units can be released using the following procedure:
a) Depress FINE button for 3 seconds. The Master/Slave configuration will be displayed on the
CURRENT display.
b) Select H1 mode using the CURRENT encoder.
c) Depress FINE button aga
in or wait 5 seconds.
d) Turn the AC power Off to store the new setting.
e) After exiting from Slave operation the unit’s parameters will be set to:
*Programmed Voltage to zero
*Programmed Current to zero
*UVL to zero volts
*OVP to its maxi
mum value
*AST OFF
*OUT OFF
*Foldback protection OFF
*Locked Front Panel
Fig.5-4: Parallel connection with local sensing
MASTER
POWERSUPPLY
SLAVE#1
POWERSUPPLY
J1-25
J1-10
P
IPGM
+
V
-
V
+
V
-
V
LOAD
Asshort as possible
Twisted
pair
+S
-S
J1-8
J1-12
ToJ1-10
SLAVE#2
POWERSUPPLY
-S
-LS
+LS
+S
+LS
-LS
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 ba
l-
ance between power su
p
plies.
CAUTION
Make sure that the connection between
–
V terminals is reliable to avoid disco
n
nection during
operation. Disconnection may cause damage to the power supply.